kernel-ark/net
Herbert Xu 6f4b6ec1cf [IPV6]: Fix illegal dst locking in softirq context.
On Tue, Jan 31, 2006 at 10:24:32PM +0100, Ingo Molnar wrote:
>
>  [<c04de9e8>] _write_lock+0x8/0x10
>  [<c0499015>] inet6_destroy_sock+0x25/0x100
>  [<c04b8672>] tcp_v6_destroy_sock+0x12/0x20
>  [<c046bbda>] inet_csk_destroy_sock+0x4a/0x150
>  [<c047625c>] tcp_rcv_state_process+0xd4c/0xdd0
>  [<c047d8e9>] tcp_v4_do_rcv+0xa9/0x340
>  [<c047eabb>] tcp_v4_rcv+0x8eb/0x9d0

OK this is definitely broken.  We should never touch the dst lock in
softirq context.  Since inet6_destroy_sock may be called from that
context due to the asynchronous nature of sockets, we can't take the
lock there.

In fact this sk_dst_reset is totally redundant since all IPv6 sockets
use inet_sock_destruct as their socket destructor which always cleans
up the dst anyway.  So the solution is to simply remove the call.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-02 17:01:13 -08:00
..
802
8021q
appletalk
atm
ax25
bluetooth
bridge
core
dccp
decnet
econet
ethernet
ieee80211
ipv4 [IPV4] multipath_wrandom: Fix softirq-unsafe spin lock usage 2006-02-02 16:59:16 -08:00
ipv6 [IPV6]: Fix illegal dst locking in softirq context. 2006-02-02 17:01:13 -08:00
ipx
irda
key
lapb
llc
netfilter
netlink
netrom
packet
rose
rxrpc
sched
sctp [SCTP]: Fix 'fast retransmit' to send a TSN only once. 2006-02-02 16:57:31 -08:00
sunrpc
tipc
unix
wanrouter
x25
xfrm
compat.c
Kconfig
Makefile
nonet.c
socket.c
sysctl_net.c
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