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author | Yifeng Sun <pkusunyifeng@gmail.com> | 2019-02-01 15:56:04 -0800 |
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committer | Ben Pfaff <blp@ovn.org> | 2019-02-04 12:45:25 -0800 |
commit | 99c9ba8ec013b89138440b85ffc061bb90377114 (patch) | |
tree | 9f74d915861a39107f42662638bd58a41552c4f8 | |
parent | d8bd74950c0dec18f350a99fe89bfdf14543013f (diff) | |
download | openvswitch-branch-2.0.tar.gz |
odp-util: Stop parse odp actions if nlattr is overflowbranch-2.0
`encap = nl_msg_start_nested(key, OVS_KEY_ATTR_ENCAP)` ensures that
key->size >= (encap + NLA_HDRLEN), so the `if` statement is safe.
Reported-at: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=11306
Signed-off-by: Yifeng Sun <pkusunyifeng@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
-rw-r--r-- | lib/odp-util.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/odp-util.c b/lib/odp-util.c index d83159c4f..fca28f937 100644 --- a/lib/odp-util.c +++ b/lib/odp-util.c @@ -2330,6 +2330,10 @@ parse_odp_key_mask_attr(const char *s, const struct simap *port_names, if (retval < 0) { return retval; } + + if (nl_attr_oversized(key->size - encap - NLA_HDRLEN)) { + return -E2BIG; + } s += retval; } s++; |