]> err.no Git - linux-2.6/commit
[SCTP]: Fix kernel panic while received ASCONF chunk with bad serial number
authorWei Yongjun <yjwei@cn.fujitsu.com>
Tue, 5 Feb 2008 14:35:04 +0000 (23:35 +0900)
committerVlad Yasevich <vladislav.yasevich@hp.com>
Thu, 7 Feb 2008 02:27:39 +0000 (21:27 -0500)
commita869981423b96045c49420a6884c72528836cea8
treef8f97758febdd52e19bc4c27c566a9ba3027e359
parentb46ae36de451212d253f31112338517753739191
[SCTP]: Fix kernel panic while received ASCONF chunk with bad serial number

While recevied ASCONF chunk with serial number less then needed, kernel
will treat this chunk as a retransmitted ASCONF chunk and find cached
ASCONF-ACK chunk used sctp_assoc_lookup_asconf_ack(). But this function
will always return NO-NULL. So response with cached ASCONF-ACKs chunk
will cause kernel panic.
In function sctp_assoc_lookup_asconf_ack(), if the cached ASCONF-ACKs
list asconf_ack_list is empty, or if the serial being requested does not
exists, the function as it currectly stands returns the actuall
list_head asoc->asconf_ack_list, this is not a cache ASCONF-ACK chunk
but a bogus pointer.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
net/sctp/associola.c