Bug #1154
closed
fix ip_input m_len assertion
0%
Description
Hi all,
Following patch fixes:
- The assertion in ip_input, should test sizeof(struct ip) instead of sizeof(ip)
- Make sure that ip_input's precondition meets in ip_localforward
- Don't allow raw ip socket to send ip packet whose header length is
less than the minimum
http://leaf.dragonflybsd.org/~sephe/ip_assert.diff
Please test/review.
Best Regards,
sephe
Updated by nthery over 15 years ago
The diff looks fine to me (but I don't know much about networking).
Out of curiosity in ip_localforward(), how can the packet be freed
while we are trying to forward it?
+ /* The packet was freed; we are done */
Cheers,
Nicolas
Updated by sepherosa over 15 years ago
Above comment is in following code block:
+ if (m->m_len < hlen) {
+ m = m_pullup(m, hlen);
+ if (m == NULL) {
+ /* The packet was freed; we are done */
+ return 1;
+ }
+ }
If m_pullup failed ('m' is freed), then we lost the mbuf, so we could
not return 0 to let ip_output keep going.
Best Regards,
sephe
Updated by