[Bug 1687004] Re: multipath crash generating core dump

[Rafael David Tinoco]

There is a commit:

commit 123cb42439a3f31bef49adb4325a16cb9b8c0aeb 
Author: Hannes Reinecke <hare at suse.de> 
Date: Tue Jan 8 14:54:03 2013 +0100 

Make log_pthread more robust

We don't need to allocate memory for mutexes, we can just 
be using static variables. And valgrind complained about 
logqueue flush from shutdown, so don't do this. 
The normal shutdown process should be flushing the log 
queue anyway. 

Signed-off-by: Hannes Reinecke <hare at suse.de>

That takes care of what happened in this crash.

I'm providing this commit as a SRU attempt soon.

** Tags added: sts

** Changed in: multipath-tools (Ubuntu)
       Status: New => In Progress

** Changed in: multipath-tools (Ubuntu)
   Importance: Undecided => Medium

** Changed in: multipath-tools (Ubuntu)
     Assignee: (unassigned) => Rafael David Tinoco (inaddy)

** Changed in: multipath-tools (Ubuntu)
    Milestone: None => ubuntu-14.04.5

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to multipath-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1687004

Title:
  multipath crash generating core dump

Status in multipath-tools package in Ubuntu:
  In Progress

Bug description:
  It was brought to my attention that:

  multipath-tools: 0.4.9-3ubuntu7.15

  Faced a crash and generated a dump.

  ## multipath (trusty) crashed and its dump shows:

  (gdb) bt full
  #0  __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:66
          __PRETTY_FUNCTION__ = "__pthread_mutex_lock"
          type = 0
  #1  0x00007f48700b606e in flush_logqueue () at log_pthread.c:39
          empty = 0
  #2  0x00007f48700b611b in log_thread (et=0x0) at log_pthread.c:57
  No locals.
  #3  0x00007f4870964184 in start_thread (arg=0x7f4870d8b700) at pthread_create.c:312
          __res = <optimized out>
          pd = 0x7f4870d8b700
          now = <optimized out>
          unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139949107623680, -3200163692152804016, 0, 0, 139949107624384, 139949107623680, 3244383534590274896, 
                  3244383107817352528}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
          not_first_call = <optimized out>
          pagesize_m1 = <optimized out>
          sp = <optimized out>
          freesize = <optimized out>
          __PRETTY_FUNCTION__ = "start_thread"
  #4  0x00007f486fdb537d in __ecvt_r (value=9.532824124368238e-130, ndigit=0, decpt=0x0, sign=0x0, buf=0x7f4870d8b9c0 "\220R\267pH\177", len=139949107623680)
      at efgcvt_r.c:218
          d = 0
          f = 3.2378592100206092e-319
          exponent = 1893250816
  #5  0x0000000000000000 in ?? ()
  No symbol table info available.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1687004/+subscriptions