diff options
Diffstat (limited to 'sys/netinet/tcp_input.c')
| -rw-r--r-- | sys/netinet/tcp_input.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 9cdff6a..427e6c7 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -2329,8 +2329,10 @@ tcp_dooptions(tp, cp, cnt, th, to) if (opt == TCPOPT_NOP) optlen = 1; else { + if (cnt < 2) + break; optlen = cp[1]; - if (optlen <= 0) + if (optlen < 2 || optlen > cnt) break; } switch (opt) { |
