Re: OOPS in nf_ct_unlink_expect_report using Polycom RealPresence Mobile

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Dear Alexey,

seems to help. Thank you for your quick response. Kernel 3.10.28 is now stable using h323 / Polycom.

Will test this patch with different kernel versions the next days.

Best Regards,
Toni


Original message from Alexey Dobriyan:
--------------------------------------------------------------------------------------
Date	Fri, 31 Jan 2014 16:29:58 +0300
Subject Re: OOPS in nf_ct_unlink_expect_report using Polycom RealPresence Mobile
From	Alexey Dobriyan <>


Disabling nf_nat_h323 and nf_conntrack_h323 avoids crash -
but video conferencing software is no more usable.

BUG: unable to handle kernel paging request at 00100104
IP: [<f8214f07>] nf_ct_unlink_expect_report

This must be the same bug fixed in SIP module:
commit 3f509c689a07a4aa989b426893d8491a7ffcc410
netfilter: nf_nat_sip: fix incorrect handling of EBUSY for RTCP expectation

Try attached patch (if this is mangled):

--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -229,7 +229,10 @@ static int nat_rtp_rtcp(struct sk_buff *skb,
struct nf_conn *ct,
  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);
  nated_port = 0;
  break;--- a/net/ipv4/netfilter/nf_nat_h323.c
+++ b/net/ipv4/netfilter/nf_nat_h323.c
@@ -229,7 +229,10 @@ static int nat_rtp_rtcp(struct sk_buff *skb, struct nf_conn *ct,
 			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);
 				nated_port = 0;
 				break;


--
To unsubscribe from this list: send the line "unsubscribe netfilter" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Netfilter Development]     [Linux Kernel Networking Development]     [Netem]     [Berkeley Packet Filter]     [Linux Kernel Development]     [Advanced Routing & Traffice Control]     [Bugtraq]

  Powered by Linux