If enough large input is given ofpact_finish will fail. Check was added and error message returned.
Basic manual testing performed. Reported-by: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12972 Signed-off-by: Toms Atteka <[email protected]> --- lib/learn.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/lib/learn.c b/lib/learn.c index 642ce18..5b168e4 100644 --- a/lib/learn.c +++ b/lib/learn.c @@ -455,6 +455,11 @@ learn_parse__(char *orig, char *arg, const struct ofputil_port_map *port_map, learn = ofpacts->header; } } + + if ((char *)ofpbuf_tail(ofpacts) - (char *)ofpacts->header > UINT16_MAX) { + return xasprintf("input too big"); + } + ofpact_finish_LEARN(ofpacts, &learn); return NULL; -- 2.7.4 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
