ipv4: fix possible seqlock deadlock
authorEric Dumazet <edumazet@google.com>
Thu, 14 Nov 2013 21:37:54 +0000 (13:37 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 8 Dec 2013 15:29:25 +0000 (07:29 -0800)
commitac6a5b926d2d8df1596f7cb91f46afc18e5e39f9
tree372ff792d5b54001be023c36c9047074847e7a73
parentf0173a11a965e9e6cc248ccf9efa88cfd22355f9
ipv4: fix possible seqlock deadlock

[ Upstream commit c9e9042994d37cbc1ee538c500e9da1bb9d1bcdf ]

ip4_datagram_connect() being called from process context,
it should use IP_INC_STATS() instead of IP_INC_STATS_BH()
otherwise we can deadlock on 32bit arches, or get corruptions of
SNMP counters.

Fixes: 584bdf8cbdf6 ("[IPV4]: Fix "ipOutNoRoutes" counter error for TCP and UDP")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv4/datagram.c