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authorOctavian Purdila <opurdila@ixiacom.com>2010-12-16 17:26:56 -0500
committerDavid S. Miller <davem@davemloft.net>2010-12-16 17:26:56 -0500
commitfcbdf09d9652c8919dcf47072e3ae7dcb4eb98ac (patch)
tree51e3cc1fbd813a880ea09dc31a12683b73d87e05 /net/ipv6/udp.c
parent2984961c388381c1830f95e1c2dc2137301b1009 (diff)
net: fix nulls list corruptions in sk_prot_alloc
Special care is taken inside sk_port_alloc to avoid overwriting skc_node/skc_nulls_node. We should also avoid overwriting skc_bind_node/skc_portaddr_node. The patch fixes the following crash: BUG: unable to handle kernel paging request at fffffffffffffff0 IP: [<ffffffff812ec6dd>] udp4_lib_lookup2+0xad/0x370 [<ffffffff812ecc22>] __udp4_lib_lookup+0x282/0x360 [<ffffffff812ed63e>] __udp4_lib_rcv+0x31e/0x700 [<ffffffff812bba45>] ? ip_local_deliver_finish+0x65/0x190 [<ffffffff812bbbf8>] ? ip_local_deliver+0x88/0xa0 [<ffffffff812eda35>] udp_rcv+0x15/0x20 [<ffffffff812bba45>] ip_local_deliver_finish+0x65/0x190 [<ffffffff812bbbf8>] ip_local_deliver+0x88/0xa0 [<ffffffff812bb2cd>] ip_rcv_finish+0x32d/0x6f0 [<ffffffff8128c14c>] ? netif_receive_skb+0x99c/0x11c0 [<ffffffff812bb94b>] ip_rcv+0x2bb/0x350 [<ffffffff8128c14c>] netif_receive_skb+0x99c/0x11c0 Signed-off-by: Leonard Crestez <lcrestez@ixiacom.com> Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp.c')
-rw-r--r--net/ipv6/udp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 91def93bec85..cd6cb7c3e563 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1477,6 +1477,7 @@ struct proto udpv6_prot = {
1477 .compat_setsockopt = compat_udpv6_setsockopt, 1477 .compat_setsockopt = compat_udpv6_setsockopt,
1478 .compat_getsockopt = compat_udpv6_getsockopt, 1478 .compat_getsockopt = compat_udpv6_getsockopt,
1479#endif 1479#endif
1480 .clear_sk = sk_prot_clear_portaddr_nulls,
1480}; 1481};
1481 1482
1482static struct inet_protosw udpv6_protosw = { 1483static struct inet_protosw udpv6_protosw = {