system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-23 02:04:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

Don't scribble on the stack if our input packet is

Browse source 
bigger than our MRU.  Moan and drop the packet
instead.
This commit is contained in:
Brian Somers 1998-01-04 20:26:37 +00:00
parent 79d1bdaedb
commit 512db5555c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=32247
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
usr.sbin/ppp/ip.c
View file

@ -17,7 +17,7 @@
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id: ip.c,v 1.34 1997/12/28 02:46:22 brian Exp $
* $Id: ip.c,v 1.35 1997/12/29 22:23:11 brian Exp $
*
* TODO:
* o Return ICMP message for filterd packet
@ -396,6 +396,12 @@ IpInput(struct mbuf * bp)
cp = tun.data;
nb = 0;
for (wp = bp; wp; wp = wp->next) { /* Copy to contiguous region */
if (sizeof tun.data - (cp - tun.data) < wp->cnt) {
LogPrintf(LogERROR, "IpInput: Packet too large (%d) - dropped\n",
plength(bp));
pfree(bp);
return;
}
memcpy(cp, MBUF_CTOP(wp), wp->cnt);
cp += wp->cnt;
nb += wp->cnt;