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| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2008-02-05 03:02:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-02-05 03:02:26 -0800 |
| commit | d2f19fa13ee5e78d4195a771f8f1ff7d42a80740 (patch) | |
| tree | 1faad0851f729cb8bf45b976cf3b28c5de9a2164 | |
| parent | b9c4d82a853713d49ac53b507964d7cf30ee408d (diff) | |
| download | linux-d2f19fa13ee5e78d4195a771f8f1ff7d42a80740.tar.bz2 | |
[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>
| -rw-r--r-- | net/sctp/sm_statefuns.c | 4 |
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()); |