Comment 7 for bug 1454008

Reproduce for me :

- start lxcfs (current from package)
- start container (ubuntu 14.04 download)

lxcfs dumps.

Here's the backtrace:

root@core01:~# gdb /usr/bin/lxcfs
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Reading symbols from /usr/bin/lxcfs...(no debugging symbols found)...done.
(gdb) run -f -s -o allow_other /var/lib/lxcfs
Starting program: /usr/bin/lxcfs -f -s -o allow_other /var/lib/lxcfs
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
fuse: read too many bytes
fuse: writing device: Invalid argument
*** Error in `/usr/bin/lxcfs': free(): invalid next size (normal): 0x00005555557824b0 ***

Program received signal SIGABRT, Aborted.
0x00007ffff6d5d267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
55 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) backtrace
#0 0x00007ffff6d5d267 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#1 0x00007ffff6d5eeca in __GI_abort () at abort.c:89
#2 0x00007ffff6da0c53 in __libc_message (do_abort=do_abort@entry=1, fmt=fmt@entry=0x7ffff6eb91a8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007ffff6da8c69 in malloc_printerr (ptr=<optimized out>, str=0x7ffff6eb9300 "free(): invalid next size (normal)", action=1) at malloc.c:4965
#4 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3834
#5 0x00007ffff6dac89c in __GI___libc_free (mem=<optimized out>) at malloc.c:2950
#6 0x00007ffff753a681 in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2
#7 0x00007ffff753f3de in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2
#8 0x00007ffff754784e in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2
#9 0x00007ffff754825b in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2
#10 0x00007ffff7544a9c in fuse_session_loop () from /lib/x86_64-linux-gnu/libfuse.so.2
#11 0x00007ffff753d1d8 in fuse_loop () from /lib/x86_64-linux-gnu/libfuse.so.2
#12 0x00007ffff754c97f in ?? () from /lib/x86_64-linux-gnu/libfuse.so.2
#13 0x0000555555556468 in ?? ()
#14 0x00007ffff6d48a40 in __libc_start_main (main=0x555555556330, argc=6, argv=0x7fffffffe608, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe5f8) at libc-start.c:289
#15 0x00005555555564a9 in ?? ()
(gdb)

If I then to do the exact same thing, but using the current build from lxcfs on github, I don't get the same dump (or any dump).