Commit Graph

51801 Commits

Author SHA1 Message Date
Christoph Hellwig
e88958e636 net: handle NULL ->poll gracefully
The big aio poll revert broke various network protocols that don't
implement ->poll as a patch in the aio poll serie removed sock_no_poll
and made the common code handle this case.

Reported-by: syzbot+57727883dbad76db2ef0@syzkaller.appspotmail.com
Reported-by: syzbot+cdb0d3176b53d35ad454@syzkaller.appspotmail.com
Reported-by: syzbot+2c7e8f74f8b2571c87e8@syzkaller.appspotmail.com
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Fixes: a11e1d432b ("Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-29 06:51:51 -07:00
Linus Torvalds
a11e1d432b Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
The poll() changes were not well thought out, and completely
unexplained.  They also caused a huge performance regression, because
"->poll()" was no longer a trivial file operation that just called down
to the underlying file operations, but instead did at least two indirect
calls.

Indirect calls are sadly slow now with the Spectre mitigation, but the
performance problem could at least be largely mitigated by changing the
"->get_poll_head()" operation to just have a per-file-descriptor pointer
to the poll head instead.  That gets rid of one of the new indirections.

But that doesn't fix the new complexity that is completely unwarranted
for the regular case.  The (undocumented) reason for the poll() changes
was some alleged AIO poll race fixing, but we don't make the common case
slower and more complex for some uncommon special case, so this all
really needs way more explanations and most likely a fundamental
redesign.

[ This revert is a revert of about 30 different commits, not reverted
  individually because that would just be unnecessarily messy  - Linus ]

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-28 10:40:47 -07:00
Linus Torvalds
6f0d349d92 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix netpoll OOPS in r8169, from Ville Syrjälä.

 2) Fix bpf instruction alignment on powerpc et al., from Eric Dumazet.

 3) Don't ignore IFLA_MTU attribute when creating new ipvlan links. From
    Xin Long.

 4) Fix use after free in AF_PACKET, from Eric Dumazet.

 5) Mis-matched RTNL unlock in xen-netfront, from Ross Lagerwall.

 6) Fix VSOCK loopback on big-endian, from Claudio Imbrenda.

 7) Missing RX buffer offset correction when computing DMA addresses in
    mvneta driver, from Antoine Tenart.

 8) Fix crashes in DCCP's ccid3_hc_rx_send_feedback, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (34 commits)
  sfc: make function efx_rps_hash_bucket static
  strparser: Corrected typo in documentation.
  qmi_wwan: add support for the Dell Wireless 5821e module
  cxgb4: when disabling dcb set txq dcb priority to 0
  net_sched: remove a bogus warning in hfsc
  net: dccp: switch rx_tstamp_last_feedback to monotonic clock
  net: dccp: avoid crash in ccid3_hc_rx_send_feedback()
  net: Remove depends on HAS_DMA in case of platform dependency
  MAINTAINERS: Add file patterns for dsa device tree bindings
  net: mscc: make sparse happy
  net: mvneta: fix the Rx desc DMA address in the Rx path
  Documentation: e1000: Fix docs build error
  Documentation: e100: Fix docs build error
  Documentation: e1000: Use correct heading adornment
  Documentation: e100: Use correct heading adornment
  ipv6: mcast: fix unsolicited report interval after receiving querys
  vhost_net: validate sock before trying to put its fd
  VSOCK: fix loopback on big-endian systems
  net: ethernet: ti: davinci_cpdma: make function cpdma_desc_pool_create static
  xen-netfront: Update features after registering netdev
  ...
2018-06-25 15:58:17 +08:00
Cong Wang
35b42da69e net_sched: remove a bogus warning in hfsc
In update_vf():

  cftree_remove(cl);
  update_cfmin(cl->cl_parent);

the cl_cfmin of cl->cl_parent is intentionally updated to 0
when that parent only has one child. And if this parent is
root qdisc, we could end up, in hfsc_schedule_watchdog(),
that we can't decide the next schedule time for qdisc watchdog.
But it seems safe that we can just skip it, as this watchdog is
not always scheduled anyway.

Thanks to Marco for testing all the cases, nothing is broken.

Reported-by: Marco Berizzi <pupilla@libero.it>
Tested-by: Marco Berizzi <pupilla@libero.it>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-23 10:58:46 +09:00
Eric Dumazet
0ce4e70ff0 net: dccp: switch rx_tstamp_last_feedback to monotonic clock
To compute delays, better not use time of the day which can
be changed by admins or malicious programs.

Also change ccid3_first_li() to use s64 type for delta variable
to avoid potential overflows.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Cc: dccp@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-23 10:46:44 +09:00
Eric Dumazet
74174fe563 net: dccp: avoid crash in ccid3_hc_rx_send_feedback()
On fast hosts or malicious bots, we trigger a DCCP_BUG() which
seems excessive.

syzbot reported :

BUG: delta (-6195) <= 0 at net/dccp/ccids/ccid3.c:628/ccid3_hc_rx_send_feedback()
CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.18.0-rc1+ #112
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 ccid3_hc_rx_send_feedback net/dccp/ccids/ccid3.c:628 [inline]
 ccid3_hc_rx_packet_recv.cold.16+0x38/0x71 net/dccp/ccids/ccid3.c:793
 ccid_hc_rx_packet_recv net/dccp/ccid.h:185 [inline]
 dccp_deliver_input_to_ccids+0xf0/0x280 net/dccp/input.c:180
 dccp_rcv_established+0x87/0xb0 net/dccp/input.c:378
 dccp_v4_do_rcv+0x153/0x180 net/dccp/ipv4.c:654
 sk_backlog_rcv include/net/sock.h:914 [inline]
 __sk_receive_skb+0x3ba/0xd80 net/core/sock.c:517
 dccp_v4_rcv+0x10f9/0x1f58 net/dccp/ipv4.c:875
 ip_local_deliver_finish+0x2eb/0xda0 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip_local_deliver+0x1e9/0x750 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:450 [inline]
 ip_rcv_finish+0x823/0x2220 net/ipv4/ip_input.c:396
 NF_HOOK include/linux/netfilter.h:287 [inline]
 ip_rcv+0xa18/0x1284 net/ipv4/ip_input.c:492
 __netif_receive_skb_core+0x2488/0x3680 net/core/dev.c:4628
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:4693
 process_backlog+0x219/0x760 net/core/dev.c:5373
 napi_poll net/core/dev.c:5771 [inline]
 net_rx_action+0x7da/0x1980 net/core/dev.c:5837
 __do_softirq+0x2e8/0xb17 kernel/softirq.c:284
 run_ksoftirqd+0x86/0x100 kernel/softirq.c:645
 smpboot_thread_fn+0x417/0x870 kernel/smpboot.c:164
 kthread+0x345/0x410 kernel/kthread.c:240
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Cc: dccp@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-23 10:46:43 +09:00
Hangbin Liu
6c6da92808 ipv6: mcast: fix unsolicited report interval after receiving querys
After recieving MLD querys, we update idev->mc_maxdelay with max_delay
from query header. This make the later unsolicited reports have the same
interval with mc_maxdelay, which means we may send unsolicited reports with
long interval time instead of default configured interval time.

Also as we will not call ipv6_mc_reset() after device up. This issue will
be there even after leave the group and join other groups.

Fixes: fc4eba58b4 ("ipv6: make unsolicited report intervals configurable for mld")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-23 10:27:45 +09:00
Claudio Imbrenda
e5ab564c9e VSOCK: fix loopback on big-endian systems
The dst_cid and src_cid are 64 bits, therefore 64 bit accessors should be
used, and in fact in virtio_transport_common.c only 64 bit accessors are
used. Using 32 bit accessors for 64 bit values breaks big endian systems.

This patch fixes a wrong use of le32_to_cpu in virtio_transport_send_pkt.

Fixes: b911682318 ("VSOCK: add loopback to virtio_transport")

Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-22 09:34:08 +09:00
Paolo Abeni
44a5cd436e cls_flower: fix use after free in flower S/W path
If flower filter is created without the skip_sw flag, fl_mask_put()
can race with fl_classify() and we can destroy the mask rhashtable
while a lookup operation is accessing it.

 BUG: unable to handle kernel paging request at 00000000000911d1
 PGD 0 P4D 0
 SMP PTI
 CPU: 3 PID: 5582 Comm: vhost-5541 Not tainted 4.18.0-rc1.vanilla+ #1950
 Hardware name: Dell Inc. PowerEdge R730/072T6D, BIOS 2.1.7 06/16/2016
 RIP: 0010:rht_bucket_nested+0x20/0x60
 Code: 31 c8 c1 c1 18 29 c8 c3 66 90 8b 4f 04 ba 01 00 00 00 8b 07 48 8b bf 80 00 00 0
 RSP: 0018:ffffafc5cfbb7a48 EFLAGS: 00010206
 RAX: 0000000000001978 RBX: ffff9f12dff88a00 RCX: 00000000ffff9f12
 RDX: 00000000000911d1 RSI: 0000000000000148 RDI: 0000000000000001
 RBP: ffff9f12dff88a00 R08: 000000005f1cc119 R09: 00000000a715fae2
 R10: ffffafc5cfbb7aa8 R11: ffff9f1cb4be804e R12: ffff9f1265e13000
 R13: 0000000000000000 R14: ffffafc5cfbb7b48 R15: ffff9f12dff88b68
 FS:  0000000000000000(0000) GS:ffff9f1d3f0c0000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00000000000911d1 CR3: 0000001575a94006 CR4: 00000000001626e0
 Call Trace:
  fl_lookup+0x134/0x140 [cls_flower]
  fl_classify+0xf3/0x180 [cls_flower]
  tcf_classify+0x78/0x150
  __netif_receive_skb_core+0x69e/0xa50
  netif_receive_skb_internal+0x42/0xf0
  tun_get_user+0xdd5/0xfd0 [tun]
  tun_sendmsg+0x52/0x70 [tun]
  handle_tx+0x2b3/0x5f0 [vhost_net]
  vhost_worker+0xab/0x100 [vhost]
  kthread+0xf8/0x130
  ret_from_fork+0x35/0x40
 Modules linked in: act_mirred act_gact cls_flower vhost_net vhost tap sch_ingress
 CR2: 00000000000911d1

Fix the above waiting for a RCU grace period before destroying the
rhashtable: we need to use tcf_queue_work(), as rhashtable_destroy()
must run in process context, as pointed out by Cong Wang.

v1 -> v2: use tcf_queue_work to run rhashtable_destroy().

Fixes: 05cd271fd6 ("cls_flower: Support multiple masks per priority")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-22 07:24:07 +09:00
Eric Dumazet
945d015ee0 net/packet: fix use-after-free
We should put copy_skb in receive_queue only after
a successful call to virtio_net_hdr_from_skb().

syzbot report :

BUG: KASAN: use-after-free in __skb_unlink include/linux/skbuff.h:1843 [inline]
BUG: KASAN: use-after-free in __skb_dequeue include/linux/skbuff.h:1863 [inline]
BUG: KASAN: use-after-free in skb_dequeue+0x16a/0x180 net/core/skbuff.c:2815
Read of size 8 at addr ffff8801b044ecc0 by task syz-executor217/4553

CPU: 0 PID: 4553 Comm: syz-executor217 Not tainted 4.18.0-rc1+ #111
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 __skb_unlink include/linux/skbuff.h:1843 [inline]
 __skb_dequeue include/linux/skbuff.h:1863 [inline]
 skb_dequeue+0x16a/0x180 net/core/skbuff.c:2815
 skb_queue_purge+0x26/0x40 net/core/skbuff.c:2852
 packet_set_ring+0x675/0x1da0 net/packet/af_packet.c:4331
 packet_release+0x630/0xd90 net/packet/af_packet.c:2991
 __sock_release+0xd7/0x260 net/socket.c:603
 sock_close+0x19/0x20 net/socket.c:1186
 __fput+0x35b/0x8b0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1ec/0x2a0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1b08/0x2750 kernel/exit.c:865
 do_group_exit+0x177/0x440 kernel/exit.c:968
 __do_sys_exit_group kernel/exit.c:979 [inline]
 __se_sys_exit_group kernel/exit.c:977 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:977
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4448e9
Code: Bad RIP value.
RSP: 002b:00007ffd5f777ca8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004448e9
RDX: 00000000004448e9 RSI: 000000000000fcfb RDI: 0000000000000001
RBP: 00000000006cf018 R08: 00007ffd0000a45b R09: 0000000000000000
R10: 00007ffd5f777e48 R11: 0000000000000202 R12: 00000000004021f0
R13: 0000000000402280 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 4553:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
 kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554
 skb_clone+0x1f5/0x500 net/core/skbuff.c:1282
 tpacket_rcv+0x28f7/0x3200 net/packet/af_packet.c:2221
 deliver_skb net/core/dev.c:1925 [inline]
 deliver_ptype_list_skb net/core/dev.c:1940 [inline]
 __netif_receive_skb_core+0x1bfb/0x3680 net/core/dev.c:4611
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:4693
 netif_receive_skb_internal+0x12e/0x7d0 net/core/dev.c:4767
 netif_receive_skb+0xbf/0x420 net/core/dev.c:4791
 tun_rx_batched.isra.55+0x4ba/0x8c0 drivers/net/tun.c:1571
 tun_get_user+0x2af1/0x42f0 drivers/net/tun.c:1981
 tun_chr_write_iter+0xb9/0x154 drivers/net/tun.c:2009
 call_write_iter include/linux/fs.h:1795 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6c6/0x9f0 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 4553:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kmem_cache_free+0x86/0x2d0 mm/slab.c:3756
 kfree_skbmem+0x154/0x230 net/core/skbuff.c:582
 __kfree_skb net/core/skbuff.c:642 [inline]
 kfree_skb+0x1a5/0x580 net/core/skbuff.c:659
 tpacket_rcv+0x189e/0x3200 net/packet/af_packet.c:2385
 deliver_skb net/core/dev.c:1925 [inline]
 deliver_ptype_list_skb net/core/dev.c:1940 [inline]
 __netif_receive_skb_core+0x1bfb/0x3680 net/core/dev.c:4611
 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:4693
 netif_receive_skb_internal+0x12e/0x7d0 net/core/dev.c:4767
 netif_receive_skb+0xbf/0x420 net/core/dev.c:4791
 tun_rx_batched.isra.55+0x4ba/0x8c0 drivers/net/tun.c:1571
 tun_get_user+0x2af1/0x42f0 drivers/net/tun.c:1981
 tun_chr_write_iter+0xb9/0x154 drivers/net/tun.c:2009
 call_write_iter include/linux/fs.h:1795 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6c6/0x9f0 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801b044ecc0
 which belongs to the cache skbuff_head_cache of size 232
The buggy address is located 0 bytes inside of
 232-byte region [ffff8801b044ecc0, ffff8801b044eda8)
The buggy address belongs to the page:
page:ffffea0006c11380 count:1 mapcount:0 mapping:ffff8801d9be96c0 index:0x0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006c17988 ffff8801d9bec248 ffff8801d9be96c0
raw: 0000000000000000 ffff8801b044e040 000000010000000c 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b044eb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b044ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc
>ffff8801b044ec80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
                                           ^
 ffff8801b044ed00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801b044ed80: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc

Fixes: 58d19b19cd ("packet: vnet_hdr support for tpacket_rcv")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-22 07:17:42 +09:00
Linus Torvalds
27db64f65f NFS client bugfixes for Linux 4.18
Hightlights include:
 
 Bugfixes:
 - Fix an rcu deadlock in nfs_delegation_find_inode()
 - Fix NFSv4 deadlocks due to not freeing the session slot in layoutget
 - Don't send layoutreturn if the layout is already invalid
 - Prevent duplicate XID allocation
 - flexfiles: Don't tie up all the rpciod threads in resends
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Merge tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Hightlights include:

   - fix an rcu deadlock in nfs_delegation_find_inode()

   - fix NFSv4 deadlocks due to not freeing the session slot in
     layoutget

   - don't send layoutreturn if the layout is already invalid

   - prevent duplicate XID allocation

   - flexfiles: Don't tie up all the rpciod threads in resends"

* tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  pNFS/flexfiles: Process writeback resends from nfsiod context as well
  pNFS/flexfiles: Don't tie up all the rpciod threads in resends
  sunrpc: Prevent duplicate XID allocation
  pNFS: Don't send layoutreturn if the layout is already invalid
  pNFS: Always free the session slot on error in nfs4_layoutget_handle_exception
  NFS: Fix an rcu deadlock in nfs_delegation_find_inode()
2018-06-22 06:21:34 +09:00
Marcelo Ricardo Leitner
fedb1bd3d2 sctp: fix erroneous inc of snmp SctpFragUsrMsgs
Currently it is incrementing SctpFragUsrMsgs when the user message size
is of the exactly same size as the maximum fragment size, which is wrong.

The fix is to increment it only when user message is bigger than the
maximum fragment size.

Fixes: bfd2e4b873 ("sctp: refactor sctp_datamsg_from_user")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-21 12:49:33 +09:00
Vakul Garg
456488cd95 strparser: Don't schedule in workqueue in paused state
In function strp_data_ready(), it is useless to call queue_work if
the state of strparser is already paused. The state checking should
be done before calling queue_work. The change reduces the context
switches and improves the ktls-rx throughput by approx 20% (measured
on cortex-a53 based platform).

Signed-off-by: Vakul Garg <vakul.garg@nxp.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-21 09:54:05 +09:00
Matteo Croce
c24fb5e68e bpfilter: fix user mode helper cross compilation
Use $(OBJDUMP) instead of literal 'objdump' to avoid
using host toolchain when cross compiling.

Fixes: 421780fd49 ("bpfilter: fix build error")
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Reported-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-21 09:19:19 +09:00
Willem de Bruijn
9887cba199 ip: limit use of gso_size to udp
The ipcm(6)_cookie field gso_size is set only in the udp path. The ip
layer copies this to cork only if sk_type is SOCK_DGRAM. This check
proved too permissive. Ping and l2tp sockets have the same type.

Limit to sockets of type SOCK_DGRAM and protocol IPPROTO_UDP to
exclude ping sockets.

v1 -> v2
- remove irrelevant whitespace changes

Fixes: bec1f6f697 ("udp: generate gso with UDP_SEGMENT")
Reported-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 14:41:04 +09:00
Matteo Croce
8b26a06ad4 bpfilter: ignore binary files
net/bpfilter/bpfilter_umh is a binary file generated when bpfilter is
enabled, add it to .gitignore to avoid committing it.

Fixes: d2ba09c17a ("net: add skeleton of bpfilter kernel module")
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 09:07:46 +09:00
Matteo Croce
421780fd49 bpfilter: fix build error
bpfilter Makefile assumes that the system locale is en_US, and the
parsing of objdump output fails.
Set LC_ALL=C and, while at it, rewrite the objdump parsing so it spawns
only 2 processes instead of 7.

Fixes: d2ba09c17a ("net: add skeleton of bpfilter kernel module")
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 09:07:46 +09:00
Davide Caratti
cbf56c2962 net/sched: act_ife: preserve the action control in case of error
in the following script

 # tc actions add action ife encode allow prio pass index 42
 # tc actions replace action ife encode allow tcindex drop index 42

the action control should remain equal to 'pass', if the kernel failed
to replace the TC action. Pospone the assignment of the action control,
to ensure it is not overwritten in the error path of tcf_ife_init().

Fixes: ef6980b6be ("introduce IFE action")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 09:03:58 +09:00
Davide Caratti
0a889b9404 net/sched: act_ife: fix recursive lock and idr leak
a recursive lock warning [1] can be observed with the following script,

 # $TC actions add action ife encode allow prio pass index 42
 IFE type 0xED3E
 # $TC actions replace action ife encode allow tcindex pass index 42

in case the kernel was unable to run the last command (e.g. because of
the impossibility to load 'act_meta_skbtcindex'). For a similar reason,
the kernel can leak idr in the error path of tcf_ife_init(), because
tcf_idr_release() is not called after successful idr reservation:

 # $TC actions add action ife encode allow tcindex index 47
 IFE type 0xED3E
 RTNETLINK answers: No such file or directory
 We have an error talking to the kernel
 # $TC actions add action ife encode allow tcindex index 47
 IFE type 0xED3E
 RTNETLINK answers: No space left on device
 We have an error talking to the kernel
 # $TC actions add action ife encode use mark 7 type 0xfefe pass index 47
 IFE type 0xFEFE
 RTNETLINK answers: No space left on device
 We have an error talking to the kernel

Since tcfa_lock is already taken when the action is being edited, a call
to tcf_idr_release() wrongly makes tcf_idr_cleanup() take the same lock
again. On the other hand, tcf_idr_release() needs to be called in the
error path of tcf_ife_init(), to undo the last tcf_idr_create() invocation.
Fix both problems in tcf_ife_init().
Since the cleanup() routine can now be called when ife->params is NULL,
also add a NULL pointer check to avoid calling kfree_rcu(NULL, rcu).

 [1]
 ============================================
 WARNING: possible recursive locking detected
 4.17.0-rc4.kasan+ #417 Tainted: G            E
 --------------------------------------------
 tc/3932 is trying to acquire lock:
 000000005097c9a6 (&(&p->tcfa_lock)->rlock){+...}, at: tcf_ife_cleanup+0x19/0x80 [act_ife]

 but task is already holding lock:
 000000005097c9a6 (&(&p->tcfa_lock)->rlock){+...}, at: tcf_ife_init+0xf6d/0x13c0 [act_ife]

 other info that might help us debug this:
  Possible unsafe locking scenario:

        CPU0
        ----
   lock(&(&p->tcfa_lock)->rlock);
   lock(&(&p->tcfa_lock)->rlock);

  *** DEADLOCK ***

  May be due to missing lock nesting notation

 2 locks held by tc/3932:
  #0: 000000007ca8e990 (rtnl_mutex){+.+.}, at: tcf_ife_init+0xf61/0x13c0 [act_ife]
  #1: 000000005097c9a6 (&(&p->tcfa_lock)->rlock){+...}, at: tcf_ife_init+0xf6d/0x13c0 [act_ife]

 stack backtrace:
 CPU: 3 PID: 3932 Comm: tc Tainted: G            E     4.17.0-rc4.kasan+ #417
 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
 Call Trace:
  dump_stack+0x9a/0xeb
  __lock_acquire+0xf43/0x34a0
  ? debug_check_no_locks_freed+0x2b0/0x2b0
  ? debug_check_no_locks_freed+0x2b0/0x2b0
  ? debug_check_no_locks_freed+0x2b0/0x2b0
  ? __mutex_lock+0x62f/0x1240
  ? kvm_sched_clock_read+0x1a/0x30
  ? sched_clock+0x5/0x10
  ? sched_clock_cpu+0x18/0x170
  ? find_held_lock+0x39/0x1d0
  ? lock_acquire+0x10b/0x330
  lock_acquire+0x10b/0x330
  ? tcf_ife_cleanup+0x19/0x80 [act_ife]
  _raw_spin_lock_bh+0x38/0x70
  ? tcf_ife_cleanup+0x19/0x80 [act_ife]
  tcf_ife_cleanup+0x19/0x80 [act_ife]
  __tcf_idr_release+0xff/0x350
  tcf_ife_init+0xdde/0x13c0 [act_ife]
  ? ife_exit_net+0x290/0x290 [act_ife]
  ? __lock_is_held+0xb4/0x140
  tcf_action_init_1+0x67b/0xad0
  ? tcf_action_dump_old+0xa0/0xa0
  ? sched_clock+0x5/0x10
  ? sched_clock_cpu+0x18/0x170
  ? kvm_sched_clock_read+0x1a/0x30
  ? sched_clock+0x5/0x10
  ? sched_clock_cpu+0x18/0x170
  ? memset+0x1f/0x40
  tcf_action_init+0x30f/0x590
  ? tcf_action_init_1+0xad0/0xad0
  ? memset+0x1f/0x40
  tc_ctl_action+0x48e/0x5e0
  ? mutex_lock_io_nested+0x1160/0x1160
  ? tca_action_gd+0x990/0x990
  ? sched_clock+0x5/0x10
  ? find_held_lock+0x39/0x1d0
  rtnetlink_rcv_msg+0x4da/0x990
  ? validate_linkmsg+0x680/0x680
  ? sched_clock_cpu+0x18/0x170
  ? find_held_lock+0x39/0x1d0
  netlink_rcv_skb+0x127/0x350
  ? validate_linkmsg+0x680/0x680
  ? netlink_ack+0x970/0x970
  ? __kmalloc_node_track_caller+0x304/0x3a0
  netlink_unicast+0x40f/0x5d0
  ? netlink_attachskb+0x580/0x580
  ? _copy_from_iter_full+0x187/0x760
  ? import_iovec+0x90/0x390
  netlink_sendmsg+0x67f/0xb50
  ? netlink_unicast+0x5d0/0x5d0
  ? copy_msghdr_from_user+0x206/0x340
  ? netlink_unicast+0x5d0/0x5d0
  sock_sendmsg+0xb3/0xf0
  ___sys_sendmsg+0x60a/0x8b0
  ? copy_msghdr_from_user+0x340/0x340
  ? lock_downgrade+0x5e0/0x5e0
  ? tty_write_lock+0x18/0x50
  ? kvm_sched_clock_read+0x1a/0x30
  ? sched_clock+0x5/0x10
  ? sched_clock_cpu+0x18/0x170
  ? find_held_lock+0x39/0x1d0
  ? lock_downgrade+0x5e0/0x5e0
  ? lock_acquire+0x10b/0x330
  ? __audit_syscall_entry+0x316/0x690
  ? current_kernel_time64+0x6b/0xd0
  ? __fget_light+0x55/0x1f0
  ? __sys_sendmsg+0xd2/0x170
  __sys_sendmsg+0xd2/0x170
  ? __ia32_sys_shutdown+0x70/0x70
  ? syscall_trace_enter+0x57a/0xd60
  ? rcu_read_lock_sched_held+0xdc/0x110
  ? __bpf_trace_sys_enter+0x10/0x10
  ? do_syscall_64+0x22/0x480
  do_syscall_64+0xa5/0x480
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
 RIP: 0033:0x7fd646988ba0
 RSP: 002b:00007fffc9fab3c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
 RAX: ffffffffffffffda RBX: 00007fffc9fab4f0 RCX: 00007fd646988ba0
 RDX: 0000000000000000 RSI: 00007fffc9fab440 RDI: 0000000000000003
 RBP: 000000005b28c8b3 R08: 0000000000000002 R09: 0000000000000000
 R10: 00007fffc9faae20 R11: 0000000000000246 R12: 0000000000000000
 R13: 00007fffc9fab504 R14: 0000000000000001 R15: 000000000066c100

Fixes: 4e8c861550 ("net sched: net sched: ife action fix late binding")
Fixes: ef6980b6be ("introduce IFE action")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 09:03:58 +09:00
Li RongQing
7892bd0810 net: propagate dev_get_valid_name return code
if dev_get_valid_name failed, propagate its return code

and remove the setting err to ENODEV, it will be set to
0 again before dev_change_net_namespace exits.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 08:12:57 +09:00
David Ahern
8c43bd1706 net/tcp: Fix socket lookups with SO_BINDTODEVICE
Similar to 69678bcd4d ("udp: fix SO_BINDTODEVICE"), TCP socket lookups
need to fail if dev_match is not true. Currently, a packet to a given port
can match a socket bound to device when it should not. In the VRF case,
this causes the lookup to hit a VRF socket and not a global socket
resulting in a response trying to go through the VRF when it should not.

Fixes: 3fa6f616a7 ("net: ipv4: add second dif to inet socket lookups")
Fixes: 4297a0ef08 ("net: ipv6: add second dif to inet6 socket lookups")
Reported-by: Lou Berger <lberger@labn.net>
Diagnosed-by: Renato Westphal <renato@opensourcerouting.org>
Tested-by: Renato Westphal <renato@opensourcerouting.org>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 08:03:06 +09:00
Eric Dumazet
9b0a8da8c4 net/ipv6: respect rcu grace period before freeing fib6_info
syzbot reported use after free that is caused by fib6_info being
freed without a proper RCU grace period.

CPU: 0 PID: 1407 Comm: udevd Not tainted 4.17.0+ #39
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 __read_once_size include/linux/compiler.h:188 [inline]
 find_rr_leaf net/ipv6/route.c:705 [inline]
 rt6_select net/ipv6/route.c:761 [inline]
 fib6_table_lookup+0x12b7/0x14d0 net/ipv6/route.c:1823
 ip6_pol_route+0x1c2/0x1020 net/ipv6/route.c:1856
 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2082
 fib6_rule_lookup+0x211/0x6d0 net/ipv6/fib6_rules.c:122
 ip6_route_output_flags+0x2c5/0x350 net/ipv6/route.c:2110
 ip6_route_output include/net/ip6_route.h:82 [inline]
 icmpv6_xrlim_allow net/ipv6/icmp.c:211 [inline]
 icmp6_send+0x147c/0x2da0 net/ipv6/icmp.c:535
 icmpv6_send+0x17a/0x300 net/ipv6/ip6_icmp.c:43
 ip6_link_failure+0xa5/0x790 net/ipv6/route.c:2244
 dst_link_failure include/net/dst.h:427 [inline]
 ndisc_error_report+0xd1/0x1c0 net/ipv6/ndisc.c:695
 neigh_invalidate+0x246/0x550 net/core/neighbour.c:892
 neigh_timer_handler+0xaf9/0xde0 net/core/neighbour.c:978
 call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0x79e/0xc50 kernel/time/timer.c:1666
 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1d1/0x200 kernel/softirq.c:404
 exiting_irq arch/x86/include/asm/apic.h:527 [inline]
 smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
RIP: 0010:strlen+0x5e/0xa0 lib/string.c:482
Code: 24 00 74 3b 48 bb 00 00 00 00 00 fc ff df 4c 89 e0 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 <84> d2 75 23 80 38 00 75 de 48 83 c4 08 4c 29 e0 5b 41 5c 5d c3 48
RSP: 0018:ffff8801af117850 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff880197f53bd0 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81c5b06c RDI: ffff880197f53bc0
RBP: ffff8801af117868 R08: ffff88019a976540 R09: 0000000000000000
R10: ffff88019a976540 R11: 0000000000000000 R12: ffff880197f53bc0
R13: ffff880197f53bc0 R14: ffffffff899e4e90 R15: ffff8801d91c6a00
 strlen include/linux/string.h:267 [inline]
 getname_kernel+0x24/0x370 fs/namei.c:218
 open_exec+0x17/0x70 fs/exec.c:882
 load_elf_binary+0x968/0x5610 fs/binfmt_elf.c:780
 search_binary_handler+0x17d/0x570 fs/exec.c:1653
 exec_binprm fs/exec.c:1695 [inline]
 __do_execve_file.isra.35+0x16fe/0x2710 fs/exec.c:1819
 do_execveat_common fs/exec.c:1866 [inline]
 do_execve fs/exec.c:1883 [inline]
 __do_sys_execve fs/exec.c:1964 [inline]
 __se_sys_execve fs/exec.c:1959 [inline]
 __x64_sys_execve+0x8f/0xc0 fs/exec.c:1959
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f1576a46207
Code: 77 19 f4 48 89 d7 44 89 c0 0f 05 48 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 f7 d8 64 41 89 01 eb df b8 3b 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 02 f3 c3 48 8b 15 00 8c 2d 00 f7 d8 64 89 02
RSP: 002b:00007ffff2784568 EFLAGS: 00000202 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f1576a46207
RDX: 0000000001215b10 RSI: 00007ffff2784660 RDI: 00007ffff2785670
RBP: 0000000000625500 R08: 000000000000589c R09: 000000000000589c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001215b10
R13: 0000000000000007 R14: 0000000001204250 R15: 0000000000000005

Allocated by task 12188:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 kmem_cache_alloc_trace+0x152/0x780 mm/slab.c:3620
 kmalloc include/linux/slab.h:513 [inline]
 kzalloc include/linux/slab.h:706 [inline]
 fib6_info_alloc+0xbb/0x280 net/ipv6/ip6_fib.c:152
 ip6_route_info_create+0x782/0x2b50 net/ipv6/route.c:3013
 ip6_route_add+0x23/0xb0 net/ipv6/route.c:3154
 ipv6_route_ioctl+0x5a5/0x760 net/ipv6/route.c:3660
 inet6_ioctl+0x100/0x1f0 net/ipv6/af_inet6.c:546
 sock_do_ioctl+0xe4/0x3e0 net/socket.c:973
 sock_ioctl+0x30d/0x680 net/socket.c:1097
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16f0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 1402:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3498 [inline]
 kfree+0xd9/0x260 mm/slab.c:3813
 fib6_info_destroy+0x29b/0x350 net/ipv6/ip6_fib.c:207
 fib6_info_release include/net/ip6_fib.h:286 [inline]
 __ip6_del_rt_siblings net/ipv6/route.c:3235 [inline]
 ip6_route_del+0x11c4/0x13b0 net/ipv6/route.c:3316
 ipv6_route_ioctl+0x616/0x760 net/ipv6/route.c:3663
 inet6_ioctl+0x100/0x1f0 net/ipv6/af_inet6.c:546
 sock_do_ioctl+0xe4/0x3e0 net/socket.c:973
 sock_ioctl+0x30d/0x680 net/socket.c:1097
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x1cf/0x16f0 fs/ioctl.c:684
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701
 __do_sys_ioctl fs/ioctl.c:708 [inline]
 __se_sys_ioctl fs/ioctl.c:706 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706
 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8801b5df2580
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 8 bytes inside of
 256-byte region [ffff8801b5df2580, ffff8801b5df2680)
The buggy address belongs to the page:
page:ffffea0006d77c80 count:1 mapcount:0 mapping:ffff8801da8007c0 index:0xffff8801b5df2e40
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffffea0006c5cc48 ffffea0007363308 ffff8801da8007c0
raw: ffff8801b5df2e40 ffff8801b5df2080 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b5df2480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801b5df2500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
> ffff8801b5df2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff8801b5df2600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801b5df2680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb

Fixes: a64efe142f ("net/ipv6: introduce fib6_info struct and helpers")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsahern@gmail.com>
Reported-by: syzbot+9e6d75e3edef427ee888@syzkaller.appspotmail.com
Acked-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 07:57:23 +09:00
Joel Stanley
6e42a3f5cd net/ncsi: Use netdev_dbg for debug messages
This moves all of the netdev_printk(KERN_DEBUG, ...) messages over to
netdev_dbg.

As Joe explains:

> netdev_dbg is not included in object code unless
> DEBUG is defined or CONFIG_DYNAMIC_DEBUG is set.
> And then, it is not emitted into the log unless
> DEBUG is set or this specific netdev_dbg is enabled
> via the dynamic debug control file.

Which is what we're after in this case.

Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 07:26:58 +09:00
Joel Stanley
5d3b146736 net/ncsi: Drop no more channels message
This does not provide useful information. As the ncsi maintainer said:

 > either we get a channel or broadcom has gone out to lunch

Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 07:26:58 +09:00
Joel Stanley
87975a0117 net/ncsi: Silence debug messages
In normal operation we see this series of messages as the host drives
the network device:

 ftgmac100 1e660000.ethernet eth0: NCSI: LSC AEN - channel 0 state down
 ftgmac100 1e660000.ethernet eth0: NCSI: suspending channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI: configuring channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI: channel 0 link down after config
 ftgmac100 1e660000.ethernet eth0: NCSI interface down
 ftgmac100 1e660000.ethernet eth0: NCSI: LSC AEN - channel 0 state up
 ftgmac100 1e660000.ethernet eth0: NCSI: configuring channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI interface up
 ftgmac100 1e660000.ethernet eth0: NCSI: LSC AEN - channel 0 state down
 ftgmac100 1e660000.ethernet eth0: NCSI: suspending channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI: configuring channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI: channel 0 link down after config
 ftgmac100 1e660000.ethernet eth0: NCSI interface down
 ftgmac100 1e660000.ethernet eth0: NCSI: LSC AEN - channel 0 state up
 ftgmac100 1e660000.ethernet eth0: NCSI: configuring channel 0
 ftgmac100 1e660000.ethernet eth0: NCSI interface up

This makes all of these messages netdev_dbg. They are still useful to
debug eg. misbehaving network device firmware, but we do not need them
filling up the kernel logs in normal operation.

Acked-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-20 07:26:58 +09:00
Chuck Lever
0dae72d581 sunrpc: Prevent duplicate XID allocation
Krzysztof Kozlowski <krzk@kernel.org> reports that a heavy NFSv4
WRITE workload against a slow NFS server causes his Raspberry Pi
clients to stall. Krzysztof bisected it to commit 37ac86c3a7
("SUNRPC: Initialize rpc_rqst outside of xprt->reserve_lock") .

I was able to reproduce similar behavior and it appears that rarely
the RPC client layer is re-allocating an XID for an RPC that it has
already partially sent. This results in the client ignoring the
subsequent reply, which carries the original XID.

For various reasons, checking !req->rq_xmit_bytes_sent in
xprt_prepare_transmit is not a 100% reliable mechanism for
determining when a fresh XID is needed.

Trond's preference is to allocate the XID at the time each rpc_rqst
slot is initialized.

This patch should also address a gcc 4.1.2 complaint reported by
Geert Uytterhoeven <geert@linux-m68k.org>.

Reported-by: Krzysztof Kozlowski <krzk@kernel.org>
Fixes: 37ac86c3a7 ("SUNRPC: Initialize rpc_rqst outside of ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2018-06-19 08:53:48 -04:00
Konstantin Khlebnikov
7e85dc8cb3 net_sched: blackhole: tell upper qdisc about dropped packets
When blackhole is used on top of classful qdisc like hfsc it breaks
qlen and backlog counters because packets are disappear without notice.

In HFSC non-zero qlen while all classes are inactive triggers warning:
WARNING: ... at net/sched/sch_hfsc.c:1393 hfsc_dequeue+0xba4/0xe90 [sch_hfsc]
and schedules watchdog work endlessly.

This patch return __NET_XMIT_BYPASS in addition to NET_XMIT_SUCCESS,
this flag tells upper layer: this packet is gone and isn't queued.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-17 08:42:33 +09:00
David Woodhouse
9bbe60a67b atm: Preserve value of skb->truesize when accounting to vcc
ATM accounts for in-flight TX packets in sk_wmem_alloc of the VCC on
which they are to be sent. But it doesn't take ownership of those
packets from the sock (if any) which originally owned them. They should
remain owned by their actual sender until they've left the box.

There's a hack in pskb_expand_head() to avoid adjusting skb->truesize
for certain skbs, precisely to avoid messing up sk_wmem_alloc
accounting. Ideally that hack would cover the ATM use case too, but it
doesn't — skbs which aren't owned by any sock, for example PPP control
frames, still get their truesize adjusted when the low-level ATM driver
adds headroom.

This has always been an issue, it seems. The truesize of a packet
increases, and sk_wmem_alloc on the VCC goes negative. But this wasn't
for normal traffic, only for control frames. So I think we just got away
with it, and we probably needed to send 2GiB of LCP echo frames before
the misaccounting would ever have caused a problem and caused
atm_may_send() to start refusing packets.

Commit 14afee4b60 ("net: convert sock.sk_wmem_alloc from atomic_t to
refcount_t") did exactly what it was intended to do, and turned this
mostly-theoretical problem into a real one, causing PPPoATM to fail
immediately as sk_wmem_alloc underflows and atm_may_send() *immediately*
starts refusing to allow new packets.

The least intrusive solution to this problem is to stash the value of
skb->truesize that was accounted to the VCC, in a new member of the
ATM_SKB(skb) structure. Then in atm_pop_raw() subtract precisely that
value instead of the then-current value of skb->truesize.

Fixes: 158f323b98 ("net: adjust skb->truesize in pskb_expand_head()")
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Tested-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-17 08:27:01 +09:00
David S. Miller
0841d98641 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:

====================
pull-request: bpf 2018-06-16

The following pull-request contains BPF updates for your *net* tree.

The main changes are:

1) Fix a panic in devmap handling in generic XDP where return type
   of __devmap_lookup_elem() got changed recently but generic XDP
   code missed the related update, from Toshiaki.

2) Fix a freeze when BPF progs are loaded that include BPF to BPF
   calls when JIT is enabled where we would later bail out via error
   path w/o dropping kallsyms, and another one to silence syzkaller
   splats from locking prog read-only, from Daniel.

3) Fix a bug in test_offloads.py BPF selftest which must not assume
   that the underlying system have no BPF progs loaded prior to test,
   and one in bpftool to fix accuracy of program load time, from Jakub.

4) Fix a bug in bpftool's probe for availability of the bpf(2)
   BPF_TASK_FD_QUERY subcommand, from Yonghong.

5) Fix a regression in AF_XDP's XDP_SKB receive path where queue
   id check got erroneously removed, from Björn.

6) Fix missing state cleanup in BPF's xfrm tunnel test, from William.

7) Check tunnel type more accurately in BPF's tunnel collect metadata
   kselftest, from Jian.

8) Fix missing Kconfig fragments for BPF kselftests, from Anders.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-17 07:54:24 +09:00
Linus Torvalds
9215310cf1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Various netfilter fixlets from Pablo and the netfilter team.

 2) Fix regression in IPVS caused by lack of PMTU exceptions on local
    routes in ipv6, from Julian Anastasov.

 3) Check pskb_trim_rcsum for failure in DSA, from Zhouyang Jia.

 4) Don't crash on poll in TLS, from Daniel Borkmann.

 5) Revert SO_REUSE{ADDR,PORT} change, it regresses various things
    including Avahi mDNS. From Bart Van Assche.

 6) Missing of_node_put in qcom/emac driver, from Yue Haibing.

 7) We lack checking of the TCP checking in one special case during SYN
    receive, from Frank van der Linden.

 8) Fix module init error paths of mac80211 hwsim, from Johannes Berg.

 9) Handle 802.1ad properly in stmmac driver, from Elad Nachman.

10) Must grab HW caps before doing quirk checks in stmmac driver, from
    Jose Abreu.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (81 commits)
  net: stmmac: Run HWIF Quirks after getting HW caps
  neighbour: skip NTF_EXT_LEARNED entries during forced gc
  net: cxgb3: add error handling for sysfs_create_group
  tls: fix waitall behavior in tls_sw_recvmsg
  tls: fix use-after-free in tls_push_record
  l2tp: filter out non-PPP sessions in pppol2tp_tunnel_ioctl()
  l2tp: reject creation of non-PPP sessions on L2TPv2 tunnels
  mlxsw: spectrum_switchdev: Fix port_vlan refcounting
  mlxsw: spectrum_router: Align with new route replace logic
  mlxsw: spectrum_router: Allow appending to dev-only routes
  ipv6: Only emit append events for appended routes
  stmmac: added support for 802.1ad vlan stripping
  cfg80211: fix rcu in cfg80211_unregister_wdev
  mac80211: Move up init of TXQs
  mac80211_hwsim: fix module init error paths
  cfg80211: initialize sinfo in cfg80211_get_station
  nl80211: fix some kernel doc tag mistakes
  hv_netvsc: Fix the variable sizes in ipsecv2 and rsc offload
  rds: avoid unenecessary cong_update in loop transport
  l2tp: clean up stale tunnel or session in pppol2tp_connect's error path
  ...
2018-06-16 07:39:34 +09:00
Toshiaki Makita
6d5fc19579 xdp: Fix handling of devmap in generic XDP
Commit 67f29e07e1 ("bpf: devmap introduce dev_map_enqueue") changed
the return value type of __devmap_lookup_elem() from struct net_device *
to struct bpf_dtab_netdev * but forgot to modify generic XDP code
accordingly.

Thus generic XDP incorrectly used struct bpf_dtab_netdev where struct
net_device is expected, then skb->dev was set to invalid value.

v2:
- Fix compiler warning without CONFIG_BPF_SYSCALL.

Fixes: 67f29e07e1 ("bpf: devmap introduce dev_map_enqueue")
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-06-15 23:47:15 +02:00
Roopa Prabhu
f6a6f203d5 neighbour: skip NTF_EXT_LEARNED entries during forced gc
Commit 9ce33e4653 ("neighbour: support for NTF_EXT_LEARNED flag")
added support for NTF_EXT_LEARNED for neighbour entries.
NTF_EXT_LEARNED entries are neigh entries managed by control
plane (eg: Ethernet VPN implementation in FRR routing suite).
Periodic gc already excludes these entries. This patch extends
it to forced gc which the earlier patch missed.

Fixes: 9ce33e4653 ("neighbour: support for NTF_EXT_LEARNED flag")
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:37:33 -07:00
Daniel Borkmann
06030dbaf3 tls: fix waitall behavior in tls_sw_recvmsg
Current behavior in tls_sw_recvmsg() is to wait for incoming tls
messages and copy up to exactly len bytes of data that the user
provided. This is problematic in the sense that i) if no packet
is currently queued in strparser we keep waiting until one has been
processed and pushed into tls receive layer for tls_wait_data() to
wake up and push the decrypted bits to user space. Given after
tls decryption, we're back at streaming data, use sock_rcvlowat()
hint from tcp socket instead. Retain current behavior with MSG_WAITALL
flag and otherwise use the hint target for breaking the loop and
returning to application. This is done if currently no ctx->recv_pkt
is ready, otherwise continue to process it from our strparser
backlog.

Fixes: c46234ebb4 ("tls: RX path for ktls")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:14:30 -07:00
Daniel Borkmann
a447da7d00 tls: fix use-after-free in tls_push_record
syzkaller managed to trigger a use-after-free in tls like the
following:

  BUG: KASAN: use-after-free in tls_push_record.constprop.15+0x6a2/0x810 [tls]
  Write of size 1 at addr ffff88037aa08000 by task a.out/2317

  CPU: 3 PID: 2317 Comm: a.out Not tainted 4.17.0+ #144
  Hardware name: LENOVO 20FBCTO1WW/20FBCTO1WW, BIOS N1FET47W (1.21 ) 11/28/2016
  Call Trace:
   dump_stack+0x71/0xab
   print_address_description+0x6a/0x280
   kasan_report+0x258/0x380
   ? tls_push_record.constprop.15+0x6a2/0x810 [tls]
   tls_push_record.constprop.15+0x6a2/0x810 [tls]
   tls_sw_push_pending_record+0x2e/0x40 [tls]
   tls_sk_proto_close+0x3fe/0x710 [tls]
   ? tcp_check_oom+0x4c0/0x4c0
   ? tls_write_space+0x260/0x260 [tls]
   ? kmem_cache_free+0x88/0x1f0
   inet_release+0xd6/0x1b0
   __sock_release+0xc0/0x240
   sock_close+0x11/0x20
   __fput+0x22d/0x660
   task_work_run+0x114/0x1a0
   do_exit+0x71a/0x2780
   ? mm_update_next_owner+0x650/0x650
   ? handle_mm_fault+0x2f5/0x5f0
   ? __do_page_fault+0x44f/0xa50
   ? mm_fault_error+0x2d0/0x2d0
   do_group_exit+0xde/0x300
   __x64_sys_exit_group+0x3a/0x50
   do_syscall_64+0x9a/0x300
   ? page_fault+0x8/0x30
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

This happened through fault injection where aead_req allocation in
tls_do_encryption() eventually failed and we returned -ENOMEM from
the function. Turns out that the use-after-free is triggered from
tls_sw_sendmsg() in the second tls_push_record(). The error then
triggers a jump to waiting for memory in sk_stream_wait_memory()
resp. returning immediately in case of MSG_DONTWAIT. What follows is
the trim_both_sgl(sk, orig_size), which drops elements from the sg
list added via tls_sw_sendmsg(). Now the use-after-free gets triggered
when the socket is being closed, where tls_sk_proto_close() callback
is invoked. The tls_complete_pending_work() will figure that there's
a pending closed tls record to be flushed and thus calls into the
tls_push_pending_closed_record() from there. ctx->push_pending_record()
is called from the latter, which is the tls_sw_push_pending_record()
from sw path. This again calls into tls_push_record(). And here the
tls_fill_prepend() will panic since the buffer address has been freed
earlier via trim_both_sgl(). One way to fix it is to move the aead
request allocation out of tls_do_encryption() early into tls_push_record().
This means we don't prep the tls header and advance state to the
TLS_PENDING_CLOSED_RECORD before allocation which could potentially
fail happened. That fixes the issue on my side.

Fixes: 3c4d755915 ("tls: kernel TLS support")
Reported-by: syzbot+5c74af81c547738e1684@syzkaller.appspotmail.com
Reported-by: syzbot+709f2810a6a05f11d4d3@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:14:30 -07:00
Guillaume Nault
ecd012e45a l2tp: filter out non-PPP sessions in pppol2tp_tunnel_ioctl()
pppol2tp_tunnel_ioctl() can act on an L2TPv3 tunnel, in which case
'session' may be an Ethernet pseudo-wire.

However, pppol2tp_session_ioctl() expects a PPP pseudo-wire, as it
assumes l2tp_session_priv() points to a pppol2tp_session structure. For
an Ethernet pseudo-wire l2tp_session_priv() points to an l2tp_eth_sess
structure instead, making pppol2tp_session_ioctl() access invalid
memory.

Fixes: d9e31d17ce ("l2tp: Add L2TP ethernet pseudowire support")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:12:37 -07:00
Guillaume Nault
de9bada5d3 l2tp: reject creation of non-PPP sessions on L2TPv2 tunnels
The /proc/net/pppol2tp handlers (pppol2tp_seq_*()) iterate over all
L2TPv2 tunnels, and rightfully expect that only PPP sessions can be
found there. However, l2tp_netlink accepts creating Ethernet sessions
regardless of the underlying tunnel version.

This confuses pppol2tp_seq_session_show(), which expects that
l2tp_session_priv() returns a pppol2tp_session structure. When the
session is an Ethernet pseudo-wire, a struct l2tp_eth_sess is returned
instead. This leads to invalid memory access when
pppol2tp_session_get_sock() later tries to dereference ps->sk.

Fixes: d9e31d17ce ("l2tp: Add L2TP ethernet pseudowire support")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:12:37 -07:00
Ido Schimmel
6eba08c362 ipv6: Only emit append events for appended routes
Current code will emit an append event in the FIB notification chain for
any route added with NLM_F_APPEND set, even if the route was not
appended to any existing route.

This is inconsistent with IPv4 where such an event is only emitted when
the new route is appended after an existing one.

Align IPv6 behavior with IPv4, thereby allowing listeners to more easily
handle these events.

Fixes: f34436a430 ("net/ipv6: Simplify route replace and appending into multipath route")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:11:16 -07:00
David S. Miller
41f9ba67f0 A handful of fixes:
* missing RCU grace period enforcement led to drivers freeing
    data structures before; fix from Dedy Lansky.
  * hwsim module init error paths were messed up; fixed it myself
    after a report from Colin King (who had sent a partial patch)
  * kernel-doc tag errors; fix from Luca Coelho
  * initialize the on-stack sinfo data structure when getting
    station information; fix from Sven Eckelmann
  * TXQ state dumping is now done from init, and when TXQs aren't
    initialized yet at that point, bad things happen, move the
    initialization; fix from Toke Høiland-Jørgensen.
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Merge tag 'mac80211-for-davem-2018-06-15' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
A handful of fixes:
 * missing RCU grace period enforcement led to drivers freeing
   data structures before; fix from Dedy Lansky.
 * hwsim module init error paths were messed up; fixed it myself
   after a report from Colin King (who had sent a partial patch)
 * kernel-doc tag errors; fix from Luca Coelho
 * initialize the on-stack sinfo data structure when getting
   station information; fix from Sven Eckelmann
 * TXQ state dumping is now done from init, and when TXQs aren't
   initialized yet at that point, bad things happen, move the
   initialization; fix from Toke Høiland-Jørgensen.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-15 09:08:26 -07:00
Dedy Lansky
bf2b61a683 cfg80211: fix rcu in cfg80211_unregister_wdev
Callers of cfg80211_unregister_wdev can free the wdev object
immediately after this function returns. This may crash the kernel
because this wdev object is still in use by other threads.
Add synchronize_rcu() after list_del_rcu to make sure wdev object can
be safely freed.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
2018-06-15 13:05:14 +02:00
Toke Høiland-Jørgensen
dc8b274f09 mac80211: Move up init of TXQs
On init, ieee80211_if_add() dumps the interface. Since that now includes a
dump of the TXQ state, we need to initialise that before the dump happens.
So move up the TXQ initialisation to to before the call to
ieee80211_if_add().

Fixes: 52539ca89f ("cfg80211: Expose TXQ stats and parameters to userspace")
Reported-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Tested-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
2018-06-15 13:02:42 +02:00
Sven Eckelmann
3c12d04868 cfg80211: initialize sinfo in cfg80211_get_station
Most of the implementations behind cfg80211_get_station will not initialize
sinfo to zero before manipulating it. For example, the member "filled",
which indicates the filled in parts of this struct, is often only modified
by enabling certain bits in the bitfield while keeping the remaining bits
in their original state. A caller without a preinitialized sinfo.filled can
then no longer decide which parts of sinfo were filled in by
cfg80211_get_station (or actually the underlying implementations).

cfg80211_get_station must therefore take care that sinfo is initialized to
zero. Otherwise, the caller may tries to read information which was not
filled in and which must therefore also be considered uninitialized. In
batadv_v_elp_get_throughput's case, an invalid "random" expected throughput
may be stored for this neighbor and thus the B.A.T.M.A.N V algorithm may
switch to non-optimal neighbors for certain destinations.

Fixes: 7406353d43 ("cfg80211: implement cfg80211_get_station cfg80211 API")
Reported-by: Thomas Lauer <holminateur@gmail.com>
Reported-by: Marcel Schmidt <ff.z-casparistrasse@mailbox.org>
Cc: b.a.t.m.a.n@lists.open-mesh.org
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
2018-06-15 13:01:47 +02:00
Santosh Shilimkar
f1693c63ab rds: avoid unenecessary cong_update in loop transport
Loop transport which is self loopback, remote port congestion
update isn't relevant. Infact the xmit path already ignores it.
Receive path needs to do the same.

Reported-by: syzbot+4c20b3866171ce8441d2@syzkaller.appspotmail.com
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 19:01:49 -07:00
Guillaume Nault
bda06be215 l2tp: clean up stale tunnel or session in pppol2tp_connect's error path
pppol2tp_connect() may create a tunnel or a session. Remove them in
case of error.

Fixes: fd558d186d ("l2tp: Split pppol2tp patch into separate l2tp and ppp parts")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 17:10:19 -07:00
Guillaume Nault
3e1bc8bf97 l2tp: prevent pppol2tp_connect() from creating kernel sockets
If 'fd' is negative, l2tp_tunnel_create() creates a tunnel socket using
the configuration passed in 'tcfg'. Currently, pppol2tp_connect() sets
the relevant fields to zero, tricking l2tp_tunnel_create() into setting
up an unusable kernel socket.

We can't set 'tcfg' with the required fields because there's no way to
get them from the current connect() parameters. So let's restrict
kernel sockets creation to the netlink API, which is the original use
case.

Fixes: 789a4a2c61 ("l2tp: Add support for static unmanaged L2TPv3 tunnels")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 17:10:19 -07:00
Guillaume Nault
7ac6ab1f8a l2tp: only accept PPP sessions in pppol2tp_connect()
l2tp_session_priv() returns a struct pppol2tp_session pointer only for
PPPoL2TP sessions. In particular, if the session is an L2TP_PWTYPE_ETH
pseudo-wire, l2tp_session_priv() returns a pointer to an l2tp_eth_sess
structure, which is much smaller than struct pppol2tp_session. This
leads to invalid memory dereference when trying to lock ps->sk_lock.

Fixes: d9e31d17ce ("l2tp: Add L2TP ethernet pseudowire support")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 17:10:19 -07:00
Guillaume Nault
90904ff5f9 l2tp: fix pseudo-wire type for sessions created by pppol2tp_connect()
Define cfg.pw_type so that the new session is created with its .pwtype
field properly set (L2TP_PWTYPE_PPP).

Not setting the pseudo-wire type had several annoying effects:

  * Invalid value returned in the L2TP_ATTR_PW_TYPE attribute when
    dumping sessions with the netlink API.

  * Impossibility to delete the session using the netlink API (because
    l2tp_nl_cmd_session_delete() gets the deletion callback function
    from an array indexed by the session's pseudo-wire type).

Also, there are several cases where we should check a session's
pseudo-wire type. For example, pppol2tp_connect() should refuse to
connect a session that is not PPPoL2TP, but that requires the session's
.pwtype field to be properly set.

Fixes: f7faffa3ff ("l2tp: Add L2TPv3 protocol support")
Signed-off-by: Guillaume Nault <g.nault@alphalink.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 17:10:19 -07:00
Frank van der Linden
4fd44a98ff tcp: verify the checksum of the first data segment in a new connection
commit 079096f103 ("tcp/dccp: install syn_recv requests into ehash
table") introduced an optimization for the handling of child sockets
created for a new TCP connection.

But this optimization passes any data associated with the last ACK of the
connection handshake up the stack without verifying its checksum, because it
calls tcp_child_process(), which in turn calls tcp_rcv_state_process()
directly.  These lower-level processing functions do not do any checksum
verification.

Insert a tcp_checksum_complete call in the TCP_NEW_SYN_RECEIVE path to
fix this.

Fixes: 079096f103 ("tcp/dccp: install syn_recv requests into ehash table")
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Balbir Singh <bsingharora@gmail.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 17:04:41 -07:00
Linus Torvalds
dc594c39f7 The main piece is a set of libceph changes that revamps how OSD
requests are aborted, improving CephFS ENOSPC handling and making
 "umount -f" actually work (Zheng and myself).  The rest is mostly
 mount option handling cleanups from Chengguang and assorted fixes
 from Zheng, Luis and Dongsheng.
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Merge tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "The main piece is a set of libceph changes that revamps how OSD
  requests are aborted, improving CephFS ENOSPC handling and making
  "umount -f" actually work (Zheng and myself).

  The rest is mostly mount option handling cleanups from Chengguang and
  assorted fixes from Zheng, Luis and Dongsheng.

* tag 'ceph-for-4.18-rc1' of git://github.com/ceph/ceph-client: (31 commits)
  rbd: flush rbd_dev->watch_dwork after watch is unregistered
  ceph: update description of some mount options
  ceph: show ino32 if the value is different with default
  ceph: strengthen rsize/wsize/readdir_max_bytes validation
  ceph: fix alignment of rasize
  ceph: fix use-after-free in ceph_statfs()
  ceph: prevent i_version from going back
  ceph: fix wrong check for the case of updating link count
  libceph: allocate the locator string with GFP_NOFAIL
  libceph: make abort_on_full a per-osdc setting
  libceph: don't abort reads in ceph_osdc_abort_on_full()
  libceph: avoid a use-after-free during map check
  libceph: don't warn if req->r_abort_on_full is set
  libceph: use for_each_request() in ceph_osdc_abort_on_full()
  libceph: defer __complete_request() to a workqueue
  libceph: move more code into __complete_request()
  libceph: no need to call flush_workqueue() before destruction
  ceph: flush pending works before shutdown super
  ceph: abort osd requests on force umount
  libceph: introduce ceph_osdc_abort_requests()
  ...
2018-06-15 07:24:58 +09:00
Xin Long
9951912200 sctp: define sctp_packet_gso_append to build GSO frames
Now sctp GSO uses skb_gro_receive() to append the data into head
skb frag_list. However it actually only needs very few code from
skb_gro_receive(). Besides, NAPI_GRO_CB has to be set while most
of its members are not needed here.

This patch is to add sctp_packet_gso_append() to build GSO frames
instead of skb_gro_receive(), and it would avoid many unnecessary
checks and make the code clearer.

Note that sctp will use page frags instead of frag_list to build
GSO frames in another patch. But it may take time, as sctp's GSO
frames may have different size. skb_segment() can only split it
into the frags with the same size, which would break the border
of sctp chunks.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-14 10:25:53 -07:00
David S. Miller
60d061e347 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter patches for your net tree:

1) Fix NULL pointer dereference from nf_nat_decode_session() if NAT is
   not loaded, from Prashant Bhole.

2) Fix socket extension module autoload.

3) Don't bogusly reject sets with the NFT_SET_EVAL flag set on from
   the dynset extension.

4) Fix races with nf_tables module removal and netns exit path,
   patches from Florian Westphal.

5) Don't hit BUG_ON if jumpstack goes too deep, instead hit
   WARN_ON_ONCE, from Taehee Yoo.

6) Another NULL pointer dereference from ctnetlink, again if NAT is
   not loaded, from Florian Westphal.

7) Fix x_tables match list corruption in xt_connmark module removal
   path, also from Florian.

8) nf_conncount doesn't properly deal with conntrack zones, hence
   garbage collector may get rid of entries in a different zone.
   From Yi-Hung Wei.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-13 14:04:48 -07:00