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Fix NULL pointer dereference bug when parsing IPV6CP traffic.

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This file is already off the vendor branch, and the fix will be
in future tcpdump.org vendor branch imports.

PR:		bin/76497
MFC after:	1 week
Obtained from:	tcpdump.org rev 1.89.2.4
Discussed with:	fenner, keramida
This commit is contained in:
Bruce M Simpson 2005-01-24 14:56:48 +00:00
parent f6dc414a5c
commit a0fba9baed
1 changed files with 5 additions and 1 deletions
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6
contrib/tcpdump/print-ppp.c
View File

@ -33,7 +33,7 @@
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.89.2.3 2004/03/24 03:32:43 guy Exp $ (LBL)";
"@(#) $Header: /tcpdump/master/tcpdump/print-ppp.c,v 1.89.2.4 2004/07/13 16:00:25 hannes Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
@ -444,6 +444,10 @@ handle_ctrl_proto(u_int proto, const u_char *pptr, int length)
pfunc = NULL;
break;
}
if (pfunc == NULL) /* catch the above null pointer if unknown CP */
break;
if ((j = (*pfunc)(tptr, len)) == 0)
break;
x -= j;