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| author | jlemon <jlemon@FreeBSD.org> | 2000-06-02 20:18:38 +0000 |
|---|---|---|
| committer | jlemon <jlemon@FreeBSD.org> | 2000-06-02 20:18:38 +0000 |
| commit | d94fab6e66bc1f43b12c01759d3baaca6e0df5d2 (patch) | |
| tree | 9ecbf7d7d025e2c48fe1d6759185766c04e0625c /sys/netinet/ip_output.c | |
| parent | 7c8d1a02ff40df8fde524b8406ff5a51ae21e223 (diff) | |
| download | FreeBSD-src-d94fab6e66bc1f43b12c01759d3baaca6e0df5d2.zip FreeBSD-src-d94fab6e66bc1f43b12c01759d3baaca6e0df5d2.tar.gz | |
Add boundary checks against IP options.
Obtained from: OpenBSD
Diffstat (limited to 'sys/netinet/ip_output.c')
| -rw-r--r-- | sys/netinet/ip_output.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/netinet/ip_output.c b/sys/netinet/ip_output.c index 8faed58..2536b63 100644 --- a/sys/netinet/ip_output.c +++ b/sys/netinet/ip_output.c @@ -1382,8 +1382,10 @@ ip_pcbopts(optname, pcbopt, m) if (opt == IPOPT_NOP) optlen = 1; else { + if (cnt < IPOPT_OLEN + sizeof(*cp)) + goto bad; optlen = cp[IPOPT_OLEN]; - if (optlen <= IPOPT_OLEN || optlen > cnt) + if (optlen < IPOPT_OLEN + sizeof(*cp) || optlen > cnt) goto bad; } switch (opt) { |
