diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-08-29 15:24:09 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:17:11 -0700 |
| commit | 2b3e2b53d651ffe0b5256cbcb94e5b08b9e5d1cc (patch) | |
| tree | ef95fdc325b456f2107e7b545de2896c411f758d /net | |
| parent | 7e3cf6ea62cdaf3c556e43b09883e5d63c94536f (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.c | 5 |
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; |