bin/93841: seg fault with dmesg

[Stephen Montgomery-Smith]

>Number:         93841
>Category:       bin
>Synopsis:       seg fault with dmesg
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Feb 25 22:40:06 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Stephen Montgomery-Smith
>Release:        FreeBSD 6.1-PRERELEASE i386
>Organization:
>Environment:
System: FreeBSD cauchy 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #0: Sun Feb 5 02:37:31 CST 2006 stephen at cauchy:/usr/obj/usr/src/sys/cauchy i386


	
>Description:

My video card issues some really weird messages to the message buffer, e.g.

<
2>>

When the message buffer has such problems, dmesg will seg fault.

>How-To-Repeat:

I'm not sure how anyone else could mimic this problem.

>Fix:

--- dmesg.c-orig	Sat Feb 25 16:26:18 2006
+++ dmesg.c	Sat Feb 25 16:27:01 2006
@@ -177,7 +177,7 @@
 		nextp++;
 
 		/* Skip ^<[0-9]+> syslog sequences. */
-		if (*p == '<') {
+		if (*p == '<' && *(p+1) != '\n') {
 			errno = 0;
 			pri = strtol(p + 1, &q, 10);
 			if (*q == '>' && pri >= 0 && pri < INT_MAX &&


>Release-Note:
>Audit-Trail:
>Unformatted: