Bug 570952

Description of problem:
I have a  SD card with some faulty files, shown under /dev/mmcblk0p1 in my build-in cardreader, that I like to check.

This runs fine:
 fsck.vfat   /dev/mmcblk0p1
dosfsck 3.0.1, 23 Nov 2008, FAT32, LFN
Reclaimed 2275 unused clusters (74547200 bytes).
Leaving file system unchanged.
/dev/mmcblk0p1: 545 files, 59447/61980 clusters

But with the -a option

fsck.vfat -a  /dev/mmcblk0p1
dosfsck 3.0.1, 23 Nov 2008, FAT32, LFN
*** buffer overflow detected ***: fsck.vfat terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x4d)[0x5351ed]
/lib/libc.so.6[0x53330a]
/lib/libc.so.6[0x532a38]
/lib/libc.so.6(_IO_default_xsputn+0xb6)[0x4adbd6]
/lib/libc.so.6(_IO_vfprintf+0x1007)[0x481217]
/lib/libc.so.6(__vsprintf_chk+0xa7)[0x532ae7]
/lib/libc.so.6(__sprintf_chk+0x2d)[0x532a2d]
fsck.vfat[0x804cffe]
fsck.vfat[0x804e0b0]
fsck.vfat[0x804907f]
/lib/libc.so.6(__libc_start_main+0xe6)[0x457bb6]
fsck.vfat[0x8048b01]
======= Memory map: ========
003f8000-003f9000 r-xp 00000000 00:00 0          [vdso]
0041f000-0043d000 r-xp 00000000 08:03 375448     /lib/ld-2.11.1.so
0043d000-0043e000 r--p 0001d000 08:03 375448     /lib/ld-2.11.1.so
0043e000-0043f000 rw-p 0001e000 08:03 375448     /lib/ld-2.11.1.so
00441000-005b0000 r-xp 00000000 08:03 375450     /lib/libc-2.11.1.so
005b0000-005b2000 r--p 0016e000 08:03 375450     /lib/libc-2.11.1.so
005b2000-005b3000 rw-p 00170000 08:03 375450     /lib/libc-2.11.1.so
005b3000-005b6000 rw-p 00000000 00:00 0 
00927000-00944000 r-xp 00000000 08:03 376815     /lib/libgcc_s-4.4.3-20100127.so.1
00944000-00945000 rw-p 0001c000 08:03 376815     /lib/libgcc_s-4.4.3-20100127.so.1
08047000-08054000 r-xp 00000000 08:03 458133     /sbin/dosfsck
08054000-08055000 rw-p 0000c000 08:03 458133     /sbin/dosfsck
08055000-08057000 rw-p 00000000 00:00 0 
09181000-091c0000 rw-p 00000000 00:00 0          [heap]
b75f9000-b76ed000 rw-p 00000000 00:00 0 
b7715000-b7717000 rw-p 00000000 00:00 0 
bf97f000-bf994000 rw-p 00000000 00:00 0          [stack]
Aborted

Works fine on another card.


Version-Release number of selected component (if applicable):


How reproducible:
Always, with this card.

Additional info:

The partition table of this device is empty, or least not recognized.
This seems to be common on these SD cards.

parted  /dev/mmcblk0p1
GNU Parted 1.9.0
Using /dev/mmcblk0p1
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Model: Unknown (unknown)
Disk /dev/mmcblk0p1: 2031MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start  End  Size  Type  File system  Flags

(parted).