[Bug 1532314] Re: Buffer overflow in cgmanager

[Serge Hallyn]

Hm, sadly the trace isn't very informative:

Core was generated by `/sbin/cgmanager -m name=systemd'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007fade2d7a267 in __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
55      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) where
#0  0x00007fade2d7a267 in __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#1  0x00007fade2d7beca in __GI_abort () at abort.c:89
#2  0x00007fade2dbdc53 in __libc_message (do_abort=do_abort at entry=2, fmt=fmt at entry=0x7fade2ed3dad "*** %s ***: %s terminated\n") at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007fade2e5de8c in __GI___fortify_fail (msg=<optimized out>, msg at entry=0x7fade2ed3d44 "buffer overflow detected") at fortify_fail.c:38
#4  0x00007fade2e5be80 in __GI___chk_fail () at chk_fail.c:28
#5  0x00007fade2e5ddd7 in __fdelt_chk (d=<optimized out>) at fdelt_chk.c:25
#6  0x00007fade356e970 in nih_io_select_fds () from /lib/x86_64-linux-gnu/libnih.so.1
#7  0x00007fade3572f79 in nih_main_loop () from /lib/x86_64-linux-gnu/libnih.so.1
#8  0x000056043364a145 in ?? ()
#9  0x00007fade2d65a40 in __libc_start_main (main=0x560433649ef0, argc=3, argv=0x7ffe4e46dda8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffe4e46dd98) at libc-start.c:289
#10 0x000056043364a3d9 in ?? ()

How often does this happen?  Can you trigger it in a particular way?
Are you able to do

cgm listcontrollers
cgm getvalue memory . memory.limit_in_bytes
cgm listchildren memory .
cgm create memory x1

without any crashes?


** Changed in: lxc (Ubuntu)
   Importance: Undecided => High

** Changed in: lxc (Ubuntu)
       Status: New => Incomplete

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Title:
  Buffer overflow in cgmanager

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