summaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorPablo Neira Ayuso <pablo@netfilter.org>2012-08-29 15:24:09 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-10-21 09:17:11 -0700
commit2b3e2b53d651ffe0b5256cbcb94e5b08b9e5d1cc (patch)
treeef95fdc325b456f2107e7b545de2896c411f758d /net
parent7e3cf6ea62cdaf3c556e43b09883e5d63c94536f (diff)
netfilter: nf_nat_sip: fix incorrect handling of EBUSY for RTCP expectation
commit 3f509c689a07a4aa989b426893d8491a7ffcc410 upstream. We're hitting bug while trying to reinsert an already existing expectation: kernel BUG at kernel/timer.c:895! invalid opcode: 0000 [#1] SMP [...] Call Trace: <IRQ> [<ffffffffa0069563>] nf_ct_expect_related_report+0x4a0/0x57a [nf_conntrack] [<ffffffff812d423a>] ? in4_pton+0x72/0x131 [<ffffffffa00ca69e>] ip_nat_sdp_media+0xeb/0x185 [nf_nat_sip] [<ffffffffa00b5b9b>] set_expected_rtp_rtcp+0x32d/0x39b [nf_conntrack_sip] [<ffffffffa00b5f15>] process_sdp+0x30c/0x3ec [nf_conntrack_sip] [<ffffffff8103f1eb>] ? irq_exit+0x9a/0x9c [<ffffffffa00ca738>] ? ip_nat_sdp_media+0x185/0x185 [nf_nat_sip] We have to remove the RTP expectation if the RTCP expectation hits EBUSY since we keep trying with other ports until we succeed. Reported-by: Rafal Fitt <rafalf@aplusc.com.pl> Acked-by: David Miller <davem@davemloft.net> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/netfilter/nf_nat_sip.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/nf_nat_sip.c b/net/ipv4/netfilter/nf_nat_sip.c
index e40cf7816fdb..b1a5e9d2d7ce 100644
--- a/net/ipv4/netfilter/nf_nat_sip.c
+++ b/net/ipv4/netfilter/nf_nat_sip.c
@@ -501,7 +501,10 @@ static unsigned int ip_nat_sdp_media(struct sk_buff *skb, unsigned int dataoff,
ret = nf_ct_expect_related(rtcp_exp);
if (ret == 0)
break;
- else if (ret != -EBUSY) {
+ else if (ret == -EBUSY) {
+ nf_ct_unexpect_related(rtp_exp);
+ continue;
+ } else if (ret < 0) {
nf_ct_unexpect_related(rtp_exp);
port = 0;
break;