[Filesystems-devel] Bug#955549: f2fs-tools: fsck.f2fs segfaults

[Adam Borowski]

Package: f2fs-tools
Version: 1.11.0-1.1
Severity: normal

Hi!
After a lot of output on a damaged filesystem (SD card copied to an image)
fsck.f2fs dies with:

 - File name         : mkfs.ext3.dpkg-new
 - File size         : 6 (bytes)

Program received signal SIGSEGV, Segmentation fault.
0x00005555555593ec in memcpy (__len=18446744073323892736, __src=0x55555560760c, __dest=0x7fffffffe000) at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:34
warning: Source file is more recent than executable.
34	  return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
(gdb) bt
#0  0x00005555555593ec in memcpy (__len=18446744073323892736, __src=0x55555560760c, __dest=0x7fffffffe000) at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:34
#1  convert_encrypted_name (name=name at entry=0x55555560760c " ", len=-385658880, new=new at entry=0x7fffffffe000 " ", enc_name=<optimized out>) at fsck.c:1132
#2  0x0000555555562286 in print_inode_info (sbi=0x55555557db20 <gfsck>, node=0x5555556075b0, name=1) at mount.c:183
#3  0x0000555555562a46 in print_node_info (sbi=<optimized out>, node_block=<optimized out>, verbose=<optimized out>) at mount.c:277
#4  0x0000555555560d3f in dump_node (sbi=sbi at entry=0x55555557db20 <gfsck>, nid=nid at entry=24274, force=force at entry=1) at dump.c:520
#5  0x000055555555e94c in fsck_verify (sbi=0x55555557db20 <gfsck>) at fsck.c:2568
#6  0x000055555555699b in do_fsck (sbi=0x55555557db20 <gfsck>) at main.c:569
#7  main (argc=<optimized out>, argv=<optimized out>) at main.c:726


I tried building current upstream git, also segfaults.

I have a copy of the filesystem in question from before any repair attempts. 
It has no sensitive data on it, thus I can share if needed -- 14GB.


Meow!
-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'stable'), (150, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.6.2-00076-g18c13c0c087f (SMP w/6 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages f2fs-tools depends on:
ii  libblkid1        2.34-0.1
ii  libc6            2.30-4
ii  libf2fs-format4  1.11.0-1.1
ii  libf2fs5         1.11.0-1.1
ii  libselinux1      3.0-1+b2
ii  libuuid1         2.34-0.1

f2fs-tools recommends no packages.

f2fs-tools suggests no packages.

-- no debconf information