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(parent: 36a68fd) | patch
net: fix a race in dst_release()
authorEric Dumazet <edumazet@google.com>
Tue, 10 Nov 2015 01:51:23 +0000 (17:51 -0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 10 Nov 2015 02:55:48 +0000 (21:55 -0500)
commit390a1a5ac88f88137ab82fd5f9b82f3031d75588
tree32b81467f642ab7a2b6d0b20b2a935eb85bae712tree | snapshot
parent36a68fdeafef84e19a68ddc1edd3c258be0f6a1dcommit | diff
net: fix a race in dst_release()

Only cpu seeing dst refcount going to 0 can safely
dereference dst->flags.

Otherwise an other cpu might already have freed the dst.

Fixes: 63b489d4c4a4 ("net: avoid RCU for NOCACHE dst")
Reported-by: Greg Thelen <gthelen@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dst.c diff | blob | history
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