Package: libc6
Version: 2.10.2-6
Severity: normal
Here's a stack-trace: <quote src="gdb">
(gdb) run
Starting program: /disk/home/eddy/work/mine/toys/sscanferange
Program received signal SIGSEGV, Segmentation fault.
0xb7ee1d2d in _IO_vfscanf_internal (s=0xbfdff2dc, format=0x8048540 "%llu",
argptr=0xbfdff3a8 "žóÿ¿", errp=0x0) at vfscanf.c:1760
1760 vfscanf.c: No such file or directory.
in vfscanf.c
(gdb) bt
#0 0xb7ee1d2d in _IO_vfscanf_internal (s=0xbfdff2dc, format=0x8048540 "%llu",
argptr=0xbfdff3a8 "žóÿ¿", errp=0x0) at vfscanf.c:1760
#1 0xb7ee79c5 in *__GI___isoc99_vsscanf (string=0xbfdff3b7 '9' <repeats 200
times>..., format=0x8048540 "%llu", args=0xbfdff3a8 "žóÿ¿") at
isoc99_vsscanf.c:44
#2 0xb7ee791f in __isoc99_sscanf (s=0xbfdff3b7 '9' <repeats 200 times>...,
format=0x8048540 "%llu") at isoc99_sscanf.c:33
#3 0x08048474 in main () at sscanferange.c:11
</quote> produced by this source <file name="sscanferange.c">
#include <stdio.h>
#include <string.h>
#include <errno.h>
#define SIZE 0x200000 // crashes; 0x1fffff is ok
int main()
{
unsigned long long val;
char buf[SIZE + 1];
memset(buf, '9', SIZE);
buf[SIZE] = '\0';
errno = 0;
return 1 != sscanf(buf, "%llu", &val) || errno != ERANGE;
}
</file>
There appears to be a two megabyte limit on endurable length of
the string of digits.
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_GB.ISO-8859-15, LC_CTYPE=en_GB.ISO-8859-15 (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash
Versions of packages libc6 depends on:
ii libc-bin 2.10.2-6 Embedded GNU C Library: Binaries
ii libgcc1 1:4.4.2-9 GCC support library
Versions of packages libc6 recommends:
ii libc6-i686 2.10.2-6 GNU C Library: Shared libraries [i
Versions of packages libc6 suggests:
ii debconf [debconf-2.0] 1.5.28 Debian configuration management sy
ii glibc-doc 2.10.2-6 Embedded GNU C Library: Documentat
ii locales 2.10.2-6 Embedded GNU C Library: National L
-- debconf information:
* glibc/upgrade: true
* glibc/disable-screensaver:
glibc/restart-failed:
* glibc/restart-services: rsync openbsd-inetd nis exim4 cups cron atd xdm
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