diff options
| author | Wei Yongjun <yjwei@cn.fujitsu.com> | 2010-05-17 22:51:58 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:11:21 -0700 |
| commit | a0bda22f42ef2f990578015b8ab34252583121a2 (patch) | |
| tree | b756d4b1fc70cec1c8a90afbb6180e5e4b48b9ac | |
| parent | 966399a8b8d957ed59feb7770b33ee16ce0e8fe4 (diff) | |
sctp: fix append error cause to ERROR chunk correctly
commit 2e3219b5c8a2e44e0b83ae6e04f52f20a82ac0f2 upstream.
commit 5fa782c2f5ef6c2e4f04d3e228412c9b4a4c8809
sctp: Fix skb_over_panic resulting from multiple invalid \
parameter errors (CVE-2010-1173) (v4)
cause 'error cause' never be add the the ERROR chunk due to
some typo when check valid length in sctp_init_cause_fixed().
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Reviewed-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/sctp/sm_make_chunk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c index 590e891daed..8579b4f2f24 100644 --- a/net/sctp/sm_make_chunk.c +++ b/net/sctp/sm_make_chunk.c @@ -140,7 +140,7 @@ int sctp_init_cause_fixed(struct sctp_chunk *chunk, __be16 cause_code, len = sizeof(sctp_errhdr_t) + paylen; err.length = htons(len); - if (skb_tailroom(chunk->skb) > len) + if (skb_tailroom(chunk->skb) < len) return -ENOSPC; chunk->subh.err_hdr = sctp_addto_chunk_fixed(chunk, sizeof(sctp_errhdr_t), @@ -1412,7 +1412,7 @@ void *sctp_addto_chunk(struct sctp_chunk *chunk, int len, const void *data) void *sctp_addto_chunk_fixed(struct sctp_chunk *chunk, int len, const void *data) { - if (skb_tailroom(chunk->skb) > len) + if (skb_tailroom(chunk->skb) >= len) return sctp_addto_chunk(chunk, len, data); else return NULL; |