aboutsummaryrefslogtreecommitdiff
path: root/net
diff options
context:
space:
mode:
authorWei Yongjun <yjwei@cn.fujitsu.com>2008-02-05 03:02:26 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-05 03:02:26 -0800
commitd2f19fa13ee5e78d4195a771f8f1ff7d42a80740 (patch)
tree1faad0851f729cb8bf45b976cf3b28c5de9a2164 /net
parentb9c4d82a853713d49ac53b507964d7cf30ee408d (diff)
downloadlinux-linaro-stable-d2f19fa13ee5e78d4195a771f8f1ff7d42a80740.tar.gz
[SCTP]: Fix kernel panic while received AUTH chunk while enabled auth
If STCP is started while /proc/sys/net/sctp/auth_enable is set 0 and association is established between endpoints. Then if /proc/sys/net/sctp/auth_enable is set 1, a received AUTH chunk will cause kernel panic. Test as following: step 1: echo 0> /proc/sys/net/sctp/auth_enable step 2: SCTP client SCTP server INIT ---------> <--------- INIT-ACK COOKIE-ECHO ---------> <--------- COOKIE-ACK step 3: echo 1> /proc/sys/net/sctp/auth_enable step 4: SCTP client SCTP server AUTH -----------> Kernel Panic This patch fix this probleam to treat AUTH chunk as unknow chunk if peer has initialized with no auth capable. > Sorry for the delay. Was on vacation without net access. > > Wei Yongjun wrote: >> >> >> This patch fix this probleam to treat AUTH chunk as unknow chunk if >> peer has initialized with no auth capable. >> >> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> > > Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> > >> Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/sm_statefuns.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 5df0c4bd415b..f98658782d4f 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3865,6 +3865,10 @@ sctp_disposition_t sctp_sf_eat_auth(const struct sctp_endpoint *ep,
struct sctp_chunk *err_chunk;
sctp_ierror_t error;
+ /* Make sure that the peer has AUTH capable */
+ if (!asoc->peer.auth_capable)
+ return sctp_sf_unk_chunk(ep, asoc, type, arg, commands);
+
if (!sctp_vtag_verify(chunk, asoc)) {
sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_BAD_TAG,
SCTP_NULL());