diff options
| author | Eric Dumazet <edumazet@google.com> | 2017-02-03 00:03:26 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-02-04 19:44:22 -0500 |
| commit | d71b7896886345c53ef1d84bda2bc758554f5d61 (patch) | |
| tree | e89546d474872302fd1503e07f25bc48f6983039 /include/net | |
| parent | 34b2cef20f19c87999fff3da4071e66937db9644 (diff) | |
netlabel: out of bound access in cipso_v4_validate()
syzkaller found another out of bound access in ip_options_compile(),
or more exactly in cipso_v4_validate()
Fixes: 20e2a8648596 ("cipso: handle CIPSO options correctly when NetLabel is disabled")
Fixes: 446fda4f2682 ("[NetLabel]: CIPSOv4 engine")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Paul Moore <paul@paul-moore.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/cipso_ipv4.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/net/cipso_ipv4.h b/include/net/cipso_ipv4.h index 3ebb168b9afc..a34b141f125f 100644 --- a/include/net/cipso_ipv4.h +++ b/include/net/cipso_ipv4.h @@ -309,6 +309,10 @@ static inline int cipso_v4_validate(const struct sk_buff *skb, } for (opt_iter = 6; opt_iter < opt_len;) { + if (opt_iter + 1 == opt_len) { + err_offset = opt_iter; + goto out; + } tag_len = opt[opt_iter + 1]; if ((tag_len == 0) || (tag_len > (opt_len - opt_iter))) { err_offset = opt_iter + 1; |