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| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2009-04-26 23:13:35 +0800 |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2009-06-03 09:14:46 -0400 |
| commit | 6345b19985e9f3ec31b61720de01806e3ef680fe (patch) | |
| tree | bb34bf4a7c0bc539e405a68c6835bb40d6b91147 /net/sctp/associola.c | |
| parent | a2c395846cf6abfdda3c04a19a0982adbb6469c2 (diff) | |
| download | op-kernel-dev-6345b19985e9f3ec31b61720de01806e3ef680fe.zip op-kernel-dev-6345b19985e9f3ec31b61720de01806e3ef680fe.tar.gz | |
sctp: fix panic when T2-shutdown timer expire on removed transport
If T2-shutdown timer is expired on a removed transport, kernel
panic will occur when we do failure management on that transport.
You can reproduce this use the following sequence:
Endpoint A Endpoint B
(ESTABLISHED) (ESTABLISHED)
<----------------- SHUTDOWN
(SRC=X)
ASCONF ----------------->
(Delete IP Address = X)
<----------------- ASCONF-ACK
(Success Indication)
<----------------- SHUTDOWN
(T2-shutdown timer expire)
This patch fixed the problem.
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp/associola.c')
| -rw-r--r-- | net/sctp/associola.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c index e7b69a7..3be28fe 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -567,6 +567,14 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc, if (asoc->init_last_sent_to == peer) asoc->init_last_sent_to = NULL; + /* If we remove the transport an SHUTDOWN was last sent to, set it + * to NULL. Combined with the update of the retran path above, this + * will cause the next SHUTDOWN to be sent to the next available + * transport, maintaining the cycle. + */ + if (asoc->shutdown_last_sent_to == peer) + asoc->shutdown_last_sent_to = NULL; + asoc->peer.transport_count--; sctp_transport_free(peer); |
