[Bug malloc/16159] New: malloc_printerr() deadlock, when calling malloc_printerr() again

["darryl.miles at darrylmiles dot org" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=16159

            Bug ID: 16159
           Summary: malloc_printerr() deadlock, when calling
                    malloc_printerr() again
           Product: glibc
           Version: 2.12
            Status: NEW
          Severity: normal
          Priority: P2
         Component: malloc
          Assignee: unassigned at sourceware dot org
          Reporter: darryl.miles at darrylmiles dot org

malloc_printerr() on error detection "free(): invalid next size (fast)" ends up
calling into:

backtrace.c:init()
dl-libc.c:do_dlopen()
malloc.c:calloc()
malloc.c:malloc_printerr()

The malloc error reporting should only report the first error, not attempt to
recusively report all error (we knew it was corrupted at the outer most point,
so any further work inside malloc is also likely to find corruption).

Full stack trace to follow.


The main problem is the process does not abort() and die, it hangs around in:

pthread_once.S:pthread_one()
backtrace.c:__backtrace()

I think due to recursive lock, this lock should trylock() on the 2nd time and
abort() the process immediately.  It does appear to deadlock itself.

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