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| author | Dmitry Popov <dp@highloadlab.com> | 2010-08-07 20:24:28 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-08-07 20:24:28 -0700 |
| commit | ba78e2ddca844598c0efcbf2c76d73519a61b902 (patch) | |
| tree | 2f775c059ab21f4c97d0aaa6ee18b79026f6ba40 /net | |
| parent | e225567960db50e9810a152c8621c7a6ed94de71 (diff) | |
| download | linux-stable-ba78e2ddca844598c0efcbf2c76d73519a61b902.tar.gz linux-stable-ba78e2ddca844598c0efcbf2c76d73519a61b902.tar.bz2 linux-stable-ba78e2ddca844598c0efcbf2c76d73519a61b902.zip | |
tcp: no md5sig option size check bug
tcp_parse_md5sig_option doesn't check md5sig option (TCPOPT_MD5SIG)
length, but tcp_v[46]_inbound_md5_hash assume that it's at least 16
bytes long.
Signed-off-by: Dmitry Popov <dp@highloadlab.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_input.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 3c426cb318e7..e663b78a2ef6 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3930,7 +3930,7 @@ u8 *tcp_parse_md5sig_option(struct tcphdr *th) if (opsize < 2 || opsize > length) return NULL; if (opcode == TCPOPT_MD5SIG) - return ptr; + return opsize == TCPOLEN_MD5SIG ? ptr : NULL; } ptr += opsize - 2; length -= opsize; |