tcp: fix more NULL deref after prequeue changes

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When I cooked commit c3658e8d0f ("tcp: fix possible NULL dereference in
tcp_vX_send_reset()") I missed other spots we could deref a NULL
skb_dst(skb)

Again, if a socket is provided, we do not need skb_dst() to get a
pointer to network namespace : sock_net(sk) is good enough.

Reported-by: Dann Frazier <dann.frazier@canonical.com>
Bisected-by: Dann Frazier <dann.frazier@canonical.com>
Tested-by: Dann Frazier <dann.frazier@canonical.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: ca777eff51 ("tcp: remove dst refcount false sharing for prequeue mode")
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Eric Dumazet 2014-12-09 09:56:08 -08:00 • committed by David S. Miller

parent f15650b7f9

commit 0f85feae6b

2 changed files with 16 additions and 16 deletions

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4

net/ipv4/tcp_ipv4.c

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28

net/ipv6/tcp_ipv6.c

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