when i run ltsp-update-image, it is aborted

root@pavka:/home/pavka/commands# ltsp-update-image 1>output.txt 2>error.txt
*** glibc detected *** mksquashfs: malloc(): memory corruption: 0x0d48dde8 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6[0xb7e3d646]
/lib/tls/i686/cmov/libc.so.6(__libc_malloc+0x90)[0xb7e3efd0]
/lib/tls/i686/cmov/libc.so.6(getpwuid+0x11b)[0xb7e6496b]
mksquashfs[0x805a4bf]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0)[0xb7de9050]
mksquashfs[0x80494b1]
======= Memory map: ========
08048000-08067000 r-xp 00000000 fe:02 951672 /usr/sbin/mksquashfs
08067000-08068000 rw-p 0001e000 fe:02 951672 /usr/sbin/mksquashfs
08068000-0dc8e000 rw-p 08068000 00:00 0 [heap]
b0700000-b0762000 rw-p b0700000 00:00 0
b0762000-b0800000 ---p b0762000 00:00 0
b4800000-b48f1000 rw-p b4800000 00:00 0
b48f1000-b4900000 ---p b48f1000 00:00 0
b4a00000-b4af1000 rw-p b4a00000 00:00 0
b4af1000-b4b00000 ---p b4af1000 00:00 0
b4c00000-b4cf1000 rw-p b4c00000 00:00 0
b4cf1000-b4d00000 ---p b4cf1000 00:00 0
b4d4b000-b4dcc000 rw-p b4d4b000 00:00 0
b4dcc000-b4dcd000 ---p b4dcc000 00:00 0
b4dcd000-b55cd000 rw-p b4dcd000 00:00 0
b55cd000-b55ce000 ---p b55cd000 00:00 0
b55ce000-b5dce000 rw-p b55ce000 00:00 0
b5dce000-b5dcf000 ---p b5dce000 00:00 0
b5dcf000-b65cf000 rw-p b5dcf000 00:00 0
b65cf000-b65d0000 ---p b65cf000 00:00 0
b65d0000-b6dd0000 rw-p b65d0000 00:00 0
b6dd0000-b6dd1000 ---p b6dd0000 00:00 0
b6dd1000-b75d1000 rw-p b6dd1000 00:00 0
b75d1000-b75d2000 ---p b75d1000 00:00 0
b75d2000-b7dd3000 rw-p b75d2000 00:00 0
b7dd3000-b7f17000 r-xp 00000000 fe:02 1884247 /lib/tls/i686/cmov/libc-2.6.1.so
b7f17000-b7f18000 r--p 00143000 fe:02 1884247 /lib/tls/i686/cmov/libc-2.6.1.so
b7f18000-b7f1a000 rw-p 00144000 fe:02 1884247 /lib/tls/i686/cmov/libc-2.6.1.so
b7f1a000-b7f1d000 rw-p b7f1a000 00:00 0
b7f1d000-b7f40000 r-xp 00000000 fe:02 311619 /lib/tls/i686/cmov/libm-2.6.1.so
b7f40000-b7f42000 rw-p 00023000 fe:02 311619 /lib/tls/i686/cmov/libm-2.6.1.so
b7f42000-b7f43000 rw-p b7f42000 00:00 0
b7f43000-b7f57000 r-xp 00000000 fe:02 311708 /lib/tls/i686/cmov/libpthread-2.6.1.so
b7f57000-b7f59000 rw-p 00013000 fe:02 311708 /lib/tls/i686/cmov/libpthread-2.6.1.so
b7f59000-b7f5b000 rw-p b7f59000 00:00 0
b7f5b000-b7f6f000 r-xp 00000000 fe:02 2326607 /usr/lib/libz.so.1.2.3.3
b7f6f000-b7f70000 rw-p 00013000 fe:02 2326607 /usr/lib/libz.so.1.2.3.3
b7f9d000-b7fa7000 r-xp 00000000 fe:02 1180205 /lib/libgcc_s.so.1
b7fa7000-b7fa8000 rw-p 0000a000 fe:02 1180205 /lib/libgcc_s.so.1
b7fa8000-b7fab000 rw-p b7fa8000 00:00 0
b7fab000-b7fc5000 r-xp 00000000 fe:02 99541 /lib/ld-2.6.1.so
b7fc5000-b7fc7000 rw-p 00019000 fe:02 99541 /lib/ld-2.6.1.so
bfb0b000-bfb52000 rw-p bfb0b000 00:00 0 [stack]
ffffe000-fffff000 r-xp 00000000 00:00 0 [vdso]
root@pavka:/home/pavka/commands#