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crash in regex using glibc 2.2.93 on RedHat 8.0
From: |
Jskud |
Subject: |
crash in regex using glibc 2.2.93 on RedHat 8.0 |
Date: |
Tue, 25 Mar 2003 08:51:16 -0800 |
The follow program using regex crashes when run against glibc
2.2.93, as distributed with RedHat 8.0:
Program received signal SIGSEGV, Segmentation fault.
0x420c398d in proceed_next_node () from /lib/i686/libc.so.6
(gdb) where
#0 0x420c398d in proceed_next_node () from /lib/i686/libc.so.6
#1 0x420bdcaf in set_regs () from /lib/i686/libc.so.6
#2 0x420bd54f in re_search_internal () from /lib/i686/libc.so.6
#3 0x420c2df5 in regexec () from /lib/i686/libc.so.6
#4 0x0804843d in main () at demo_crash.c:44
#5 0x420158d4 in __libc_start_main () from /lib/i686/libc.so.6
It does not crash (and works as expected) when run against glibc-2.1.3,
as distributed with RedHat 6.2:
gcc -g -o demo_crash demo_crash.c
./demo_crash
regexec result = 0
regex worked OK
FYI. /Jskud
================================================================
#include <sys/types.h>
#include <regex.h>
#include <assert.h>
#include <stdio.h>
static char *body = "[TheFirstLine]
<!--[if gte mso 10]>
<style>
/* Style Definitions */=20
table.MsoNormalTable
{mso-style-name:QTable NormalQ;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:QQ;
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:QTimes New RomanQ;}
</style>
<![endif]-->
[TheLastLine]" ;
int
main()
{
int result ;
const char* regex = "<!--([^-]|-[^-]|--[^>])*-->" ;
regex_t preg;
regmatch_t matches[256] ;
#if 0
printf("body = <<%s>>\n", body) ;
#endif
result = regcomp(&preg, regex, REG_EXTENDED) ;
assert(result == REG_NOERROR) ;
result = regexec(&preg, body, 256, matches, 0) ;
printf("regexec result = %d\n", result) ;
assert(result == REG_NOERROR) ;
printf("regex worked OK\n") ;
return 0 ;
}
================================================================
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