[Filesystems-devel] Bug#847773: Bug#847773: aufs-tools: auplink crashes with SIGSEGV in ftw_startup()

Sun Dec 11 15:29:15 UTC 2016

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Hey Flos,

since I have never used docker and don't have a testing environment
thus: Could you try in a test environment if the problem exists with
the version 4.1+20161010-1 from testing, too? The aufs-tools should be
backward-compatible as far as I know.

Best regards,
Jan

Am 11.12.2016 um 16:00 schrieb Flos Lonicerae:
> Package: aufs-tools Version: 1:3.2+20130722-1.1 Severity: normal
> 
> Hi,
> 
> auplink always segfault unexpectedly:
> 
> root at mydesktop:~# cat /var/log/messages|grep segf Dec 11 13:13:17
> mydesktop kernel: [ 1627.466470] auplink[7024]: segfault at 
> 7ffe2ab8ced8 ip 00007fbe37812dd9 sp 00007ffe2ab8cee0 error 6 in 
> libc-2.19.so[7fbe37735000+1a1000] Dec 11 13:17:55 mydesktop kernel:
> [ 1906.022100] auplink[7873]: segfault at 7ffd75202628 ip
> 00007f40cf05bdd9 sp 00007ffd75202630 error 6 in 
> libc-2.19.so[7f40cef7e000+1a1000] Dec 11 13:18:43 mydesktop kernel:
> [ 1953.601864] auplink[8108]: segfault at 7ffc839d5098 ip
> 00007f3139e72dd9 sp 00007ffc839d50a0 error 6 in 
> libc-2.19.so[7f3139d95000+1a1000] Dec 11 17:44:01 mydesktop kernel:
> [17882.322580] auplink[1085]: segfault at 7fffec5c2868 ip
> 00007fc4ff0b7dd9 sp 00007fffec5c2870 error 6 in 
> libc-2.19.so[7fc4fefda000+1a1000] Dec 11 17:45:09 mydesktop kernel:
> [17949.768431] auplink[1393]: segfault at 7ffc17e547e8 ip
> 00007fd62f627dd9 sp 00007ffc17e547f0 error 6 in 
> libc-2.19.so[7fd62f54a000+1a1000] Dec 11 17:45:55 mydesktop kernel:
> [17995.873865] auplink[1605]: segfault at 7ffe1250f0e8 ip
> 00007f3a0d4dfdd9 sp 00007ffe1250f0f0 error 6 in 
> libc-2.19.so[7f3a0d402000+1a1000] Dec 11 20:10:17 mydesktop kernel:
> [ 3343.931533] auplink[6082]: segfault at 7ffe5e6edd28 ip
> 00007fb2d520ddd9 sp 00007ffe5e6edd30 error 6 in 
> libc-2.19.so[7fb2d5130000+1a1000] Dec 11 22:37:44 mydesktop kernel:
> [12197.065105] auplink[16901]: segfault at 7ffcf1a52ce8 ip
> 00007f6c86f79dd9 sp 00007ffcf1a52cf0 error 6 in 
> libc-2.19.so[7f6c86e9c000+1a1000]
> 
> Backtrace as follows:
> 
> Core was generated by `auplink 
> /var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa1
f'.
>
> 
Program terminated with signal SIGSEGV, Segmentation fault.
> #0  ftw_startup (dir=dir at entry=0x1d2c010 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de",
>
> 
is_nftw=is_nftw at entry=1,
> func=func at entry=0x401458 <ftw_cpup>, descriptors=1048566, 
> flags=flags at entry=19) at ../sysdeps/wordsize-64/../../io/ftw.c:656 
> 656     ../sysdeps/wordsize-64/../../io/ftw.c: No such file or
> directory. (gdb) thread apply all backtrace full
> 
> Thread 1 (LWP 6082): #0  ftw_startup (dir=dir at entry=0x1d2c010 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de",
>
> 
is_nftw=is_nftw at entry=1,
> func=func at entry=0x401458 <ftw_cpup>, descriptors=1048566, 
> flags=flags at entry=19) at ../sysdeps/wordsize-64/../../io/ftw.c:656 
> data = {dirstreams = 0x7ffe5e6edd30, actdir = 0, maxdir = 1048566, 
> dirbuf = 0x34 <error: Cannot access memory at address 0x34>,
> dirbufsize = 0, ftw = { base = 91, level = 0}, flags = 1, cvt_arr =
> 0x0, func = 0x770000006e, dev = 0, known_objects = 0x7c} st =
> {st_dev = 140730491133504, st_ino = 6303912, st_nlink = 0, st_mode 
> = 30590112, st_uid = 0, st_gid = 3580704400, __pad0 = 32690,
> st_rdev = 30589088, st_size = 5324, st_blksize = 140406059601351,
> st_blocks = 1, st_atim = {tv_sec = 0, tv_nsec = 4294967296},
> st_mtim = {tv_sec = 140406055741616, tv_nsec = 0}, st_ctim =
> {tv_sec = 5324, tv_nsec = 30590240}, __glibc_reserved =
> {140406059627237, 1048576, 19}} result = 0 save_err = <optimized
> out> cwdfd = -1 cwd = 0x0 cp = <optimized out> #1
> 0x00007fb2d520e2ba in __new_nftw (path=path at entry=0x1d2c010 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de",
>
> 
func=func at entry=0x401458 <ftw_cpup>, descriptors=<optimized out>,
> flags=flags at entry=19) at ../sysdeps/wordsize-64/../../io/ftw.c:859 
> No locals. #2  0x0000000000401cac in do_plink (br=<optimized out>,
> nbr=<optimized out>, cmd=0, cwd=0x1d2c010 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de")
>
> 
at plink.c:303
> err = 0 i = <optimized out> rlim = {rlim_cur = 1048576, rlim_max =
> 1048576} func = 0x401458 <ftw_cpup> l = <optimized out> p =
> <optimized out> #3  au_plink (cwd=cwd at entry=0x1d2c010 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de",
>
> 
cmd=cmd at entry=0,
> flags=flags at entry=1, fd=fd at entry=0x0) at plink.c:364 err =
> <optimized out> nbr = 4 ent = {mnt_fsname = 0x1d2c3b0 "none",
> mnt_dir = 0x1d2c3d0 
> "/var/lib/docker/aufs/mnt/d486a4d276491ddd7f3c91e8fb87cb3561a971bdc5aa
1f17882e4b6d2cdd74de",
>
> 
mnt_type = 0x1d2c440 "aufs", mnt_opts = 0x1d2c460
> "rw,relatime,si=a1ff9db3fc41830a,dio,dirperm1", mnt_freq = 0,
> mnt_passno = 0} br = 0x1d2c080 p = <optimized out> si =
> "si=a1ff9db3fc41830a" #4  0x00000000004013ae in main
> (argc=<optimized out>, argv=<optimized out>) at auplink.c:64 err =
> <optimized out> cmd = 0 (gdb)
> 
> 
> Looks like the upstream bug:
> https://sourceforge.net/p/aufs/bugs/26/
> 
> Any thoughts?
> 
> Thanks and Regards, Flos
> 
> 
> 
> -- System Information: Debian Release: 8.6 APT prefers
> stable-updates APT policy: (500, 'stable-updates'), (500,
> 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386
> 
> Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores) Locale: LANG=C,
> LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to
> /bin/dash Init: systemd (via /run/systemd/system)
> 
> Versions of packages aufs-tools depends on: ii  libc6
> 2.19-18+deb8u6
> 
> aufs-tools recommends no packages.
> 
> aufs-tools suggests no packages.
> 
> -- no debconf information
> 
> _______________________________________________ Filesystems-devel
> mailing list Filesystems-devel at lists.alioth.debian.org 
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/filesystems-de
vel
>
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