[Bug 178045] Re: [Hardy 8.04 Alpha-2] "Check CD for Defects" does not work. (Fixed in 8.04 Alpha-3.)

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------------------------------------------------------------------------
On 2007-12-03T15:29:09+00:00 Aurelien Jarno wrote:

The following code does not work anymore on glibc 2.7, while it was working on 
glibc 2.6:

#include <stdio.h>

int main()
{
  char *buf = " ";
  char *str;

  sscanf (buf, "%as", &str);
  printf("%p\n", str);
  return 0;
}


Instead the glibc now reports an invalid pointer:

*** glibc detected *** ./test: munmap_chunk(): invalid pointer: 
0x00007fffe37dd8c0 ***
======= Backtrace: =========
/lib/libc.so.6(cfree+0x1b6)[0x2b8ac7560d06]
/lib/libc.so.6(_IO_vfscanf+0x239f)[0x2b8ac753e29f]
/lib/libc.so.6(vsscanf+0x75)[0x2b8ac754ec85]
/lib/libc.so.6(_IO_sscanf+0x88)[0x2b8ac75498b8]
./test[0x4004bf]
/lib/libc.so.6(__libc_start_main+0xf4)[0x2b8ac75071c4]
./test[0x400409]
======= Memory map: ========
00400000-00401000 r-xp 00000000 08:02 
2392545                            /tmp/test
00600000-00601000 rw-p 00000000 08:02 
2392545                            /tmp/test
00601000-00622000 rw-p 00601000 00:00 0                                  [heap]
2b8ac72cb000-2b8ac72e8000 r-xp 00000000 08:02 
6669895                    /lib/ld-2.7.so
2b8ac72e8000-2b8ac72eb000 rw-p 2b8ac72e8000 00:00 0
2b8ac74e7000-2b8ac74e9000 rw-p 0001c000 08:02 
6669895                    /lib/ld-2.7.so
2b8ac74e9000-2b8ac763d000 r-xp 00000000 08:02 
6669873                    /lib/libc-2.7.so
2b8ac763d000-2b8ac783d000 ---p 00154000 08:02 
6669873                    /lib/libc-2.7.so
2b8ac783d000-2b8ac7840000 r--p 00154000 08:02 
6669873                    /lib/libc-2.7.so
2b8ac7840000-2b8ac7842000 rw-p 00157000 08:02 
6669873                    /lib/libc-2.7.so
2b8ac7842000-2b8ac7848000 rw-p 2b8ac7842000 00:00 0
2b8ac7848000-2b8ac7855000 r-xp 00000000 08:02 
21217454                   /lib/libgcc_s.so.1
2b8ac7855000-2b8ac7a55000 ---p 0000d000 08:02 
21217454                   /lib/libgcc_s.so.1
2b8ac7a55000-2b8ac7a56000 rw-p 0000d000 08:02 
21217454                   /lib/libgcc_s.so.1
7fffe37ca000-7fffe37df000 rw-p 7fffe37ca000 00:00 0                      
[stack]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vdso]

Reply at: https://bugs.launchpad.net/glibc/+bug/178045/comments/0

------------------------------------------------------------------------
On 2007-12-07T16:50:59+00:00 Drepper-fsp wrote:

Changed in cvs.

Reply at: https://bugs.launchpad.net/glibc/+bug/178045/comments/1


** Changed in: glibc
   Importance: Unknown => Medium

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https://bugs.launchpad.net/bugs/178045

Title:
  [Hardy 8.04 Alpha-2]  "Check CD for Defects" does not work. (Fixed in
  8.04 Alpha-3.)

Status in The GNU C Library:
  Fix Released
Status in “casper” package in Ubuntu:
  Invalid
Status in “cdrom-checker” package in Ubuntu:
  Invalid
Status in “glibc” package in Ubuntu:
  Fix Released
Status in “glibc” package in Debian:
  Fix Released

Bug description:
  Check CD option on Live CD displays the Ubuntu splash with empty
  progress bar and says "Checking integrity.  This may take some time."
  But then nothing happens.  The progress bar makes no progress.  The CD
  drive does not light up its activity LED.  The CD spins down to a full
  stop.  After a minute or so, the display goes blank black except for a
  blinking underscore cursor in the upper left corner.   Ctrl-Alt-Del
  will reboot.   I tried this on a Gateway Core 2 Duo (1.86 GHz) and a
  Northgate Celeron (2.2 GHz).  Both of these machines do execute the
  Check CD function on Hardy Alpha-1 CD, but not the one on Alpha-2 CD
  downloaded today 12/21/07 from default server for my location
  (California, USA).