[Bug nptl/21422] New: Deadlock in 2.25 pthread_cond_broadcast after process abort

["michael.krasnyk at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21422

            Bug ID: 21422
           Summary: Deadlock in 2.25 pthread_cond_broadcast after process
                    abort
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: nptl
          Assignee: unassigned at sourceware dot org
          Reporter: michael.krasnyk at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 10015
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10015&action=edit
Test for reproduction

Hi, in glibc 2.25 the attached test hangs in pthread_cond_broadcast. The test
code creates a shared mmapped file /tmp/test.mmap with a shared mutex and a
conditional variable. If the waiting process was aborted and restarted, the
signaling process hangs in pthread_cond_broadcast.

Correct behavior:
./a.out 1
./a.out 2 &  ( sleep 1 ; ./a.out 3 )

Hangs on the third line in "./a.out 3" process with libc 2.25, but works with
2.24:
./a.out 1
./a.out 2 &  p=$! ; ( sleep 1 ; kill -SIGABRT $p ; ./a.out 3 )
./a.out 2 &  ( sleep 1 ; ./a.out 3 )

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