Linux v4.3-rc1-131-ga7d5c18
This commit is contained in:
Laura Abbott
parent
428887cbbc
commit
beeefc570c
@ -29,6 +29,7 @@ CONFIG_ARM64_ERRATUM_827319=y
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CONFIG_ARM64_ERRATUM_824069=y
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CONFIG_ARM64_ERRATUM_819472=y
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CONFIG_ARM64_ERRATUM_832075=y
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CONFIG_ARM64_ERRATUM_843419=y
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# AMBA / VExpress
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# CONFIG_RTC_DRV_PL030 is not set
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@ -67,7 +67,7 @@ Summary: The Linux kernel
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# The rc snapshot level
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%define rcrev 1
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# The git snapshot level
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%define gitrev 3
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%define gitrev 4
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# Set rpm version accordingly
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%define rpmversion 4.%{upstream_sublevel}.0
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%endif
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@ -585,12 +585,8 @@ Patch508: kexec-uefi-copy-secure_boot-flag-in-boot-params.patch
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#rhbz 1239050
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Patch509: ideapad-laptop-Add-Lenovo-Yoga-3-14-to-no_hw_rfkill-.patch
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Patch519: security-device_cgroup-fix-RCU-lockdep-splat.patch
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Patch520: ARM-dts-Fix-Makefile-target-for-sun4i-a10-itead-itea.patch
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#rhbz 1258223
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Patch521: x86-alternatives-Make-optimize_nops-interrupt-safe-a.patch
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#rhbz 1237136
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Patch522: block-blkg_destroy_all-should-clear-q-root_blkg-and-.patch
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@ -2044,6 +2040,9 @@ fi
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#
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#
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%changelog
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* Fri Sep 18 2015 Laura Abbott <labbott@redhat.com> - 4.3.0-0.rc1.git4.1
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- Linux v4.3-rc1-131-ga7d5c18
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* Fri Sep 18 2015 Josh Boyer <jwboyer@fedoraproject.org>
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- Fix oops in 32-bit kernel on 64-bit AMD cpus (rhbz 1263762)
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@ -1,71 +0,0 @@
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From 85f4e5ec7bbb5f8d7cc023a12af39d76c05cd204 Mon Sep 17 00:00:00 2001
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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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Date: Wed, 2 Sep 2015 17:14:33 -0700
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Subject: [PATCH] security: device_cgroup: fix RCU lockdep splat
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On Wed, Sep 02, 2015 at 12:24:50PM -0400, Tejun Heo wrote:
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> cc'ing Paul.
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>
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> On Wed, Sep 02, 2015 at 08:12:28AM -0500, Felipe Balbi wrote:
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> > while booting AM437x device, the following splat
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> > triggered:
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> >
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> > [ 12.005238] ===============================
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> > [ 12.009749] [ INFO: suspicious RCU usage. ]
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> > [ 12.014116] 4.2.0-next-20150831 #1154 Not tainted
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> > [ 12.019050] -------------------------------
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> > [ 12.023408] security/device_cgroup.c:405 device_cgroup:verify_new_ex called without proper synchronization!
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> ...
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> > [ 12.128326] [<c0317a04>] (verify_new_ex) from [<c0317f50>] (devcgroup_access_write+0x374/0x658)
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> > [ 12.137426] [<c0317f50>] (devcgroup_access_write) from [<c00d2800>] (cgroup_file_write+0x28/0x1bc)
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> > [ 12.146796] [<c00d2800>] (cgroup_file_write) from [<c01f1670>] (kernfs_fop_write+0xc0/0x1b8)
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> > [ 12.155620] [<c01f1670>] (kernfs_fop_write) from [<c0177c94>] (__vfs_write+0x1c/0xd8)
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> > [ 12.163783] [<c0177c94>] (__vfs_write) from [<c0178594>] (vfs_write+0x90/0x16c)
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> > [ 12.171426] [<c0178594>] (vfs_write) from [<c0178db4>] (SyS_write+0x44/0x9c)
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> > [ 12.178806] [<c0178db4>] (SyS_write) from [<c000f680>] (ret_fast_syscall+0x0/0x1c)
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>
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> This shouldn't be happening because devcgroup_access_write() always
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> grabs devcgroup_mutex. Looking at the log, the culprit seems to be
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> f78f5b90c4ff ("rcu: Rename rcu_lockdep_assert() to
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> RCU_LOCKDEP_WARN()"). It missed the bang for the second test while
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> inverting it, so adding rcu_read_lock() isn't the right fix here.
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>
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> Paul, can you please fix it?
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Gah! Please see below.
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Thanx, Paul
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------------------------------------------------------------------------
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security/device_cgroup: Fix RCU_LOCKDEP_WARN() condition
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f78f5b90c4ff ("rcu: Rename rcu_lockdep_assert() to RCU_LOCKDEP_WARN()")
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introduced a bug by incorrectly inverting the condition when moving from
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rcu_lockdep_assert() to RCU_LOCKDEP_WARN(). This commit therefore fixes
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the inversion.
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Reported-by: Felipe Balbi <balbi@ti.com>
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Reported-by: Tejun Heo <tj@kernel.org>
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Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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Cc: Serge Hallyn <serge@hallyn.com>
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---
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security/device_cgroup.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/security/device_cgroup.c b/security/device_cgroup.c
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index 73455089feef..03c1652c9a1f 100644
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--- a/security/device_cgroup.c
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+++ b/security/device_cgroup.c
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@@ -401,7 +401,7 @@ static bool verify_new_ex(struct dev_cgroup *dev_cgroup,
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bool match = false;
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RCU_LOCKDEP_WARN(!rcu_read_lock_held() &&
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- lockdep_is_held(&devcgroup_mutex),
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+ !lockdep_is_held(&devcgroup_mutex),
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"device_cgroup:verify_new_ex called without proper synchronization");
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if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW) {
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--
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2.4.3
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2
sources
2
sources
@ -1,4 +1,4 @@
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3d5ea06d767e2f35c999eeadafc76523 linux-4.2.tar.xz
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4c964bfba54d65b5b54cc898baddecad perf-man-4.2.tar.gz
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45904fd88e2d6f79693abcce148a12fe patch-4.3-rc1.xz
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3e0bea6ffdb570d80e79984b951b7e49 patch-4.3-rc1-git3.xz
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0b736f1395aead55095ff8920f95befe patch-4.3-rc1-git4.xz
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@ -1,41 +0,0 @@
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From 0279e7aded382011be52a2ad340fbfdbf15e75be Mon Sep 17 00:00:00 2001
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Thu, 3 Sep 2015 12:41:47 +0200
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Subject: [PATCH] x86/alternatives: Make optimize_nops() interrupt safe and
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synced
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optimize_nops() is buggy in two aspects:
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- It's not disabling interrupts across the modification
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- It's lacking a sync_core() call
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Fixes: 4fd4b6e5537c 'x86/alternatives: Use optimized NOPs for padding'
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Reported-by: "Richard W.M. Jones" <rjones@redhat.com>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/x86/kernel/alternative.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
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index c42827eb86cf..25f909362b7a 100644
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--- a/arch/x86/kernel/alternative.c
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+++ b/arch/x86/kernel/alternative.c
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@@ -338,10 +338,15 @@ done:
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static void __init_or_module optimize_nops(struct alt_instr *a, u8 *instr)
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{
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+ unsigned long flags;
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+
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if (instr[0] != 0x90)
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return;
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+ local_irq_save(flags);
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add_nops(instr + (a->instrlen - a->padlen), a->padlen);
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+ sync_core();
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+ local_irq_restore(flags);
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DUMP_BYTES(instr, a->instrlen, "%p: [%d:%d) optimized NOPs: ",
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instr, a->instrlen - a->padlen, a->padlen);
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--
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2.4.3
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