Debian
glibc package

  1. Bug #1864864
  2. Comment #13

Comment 13 for bug 1864864

Revision history for this message
Andreas Hasenack (ahasenack) wrote :

Bionic verification

First, reproducing the bug with the current glibc:
ubuntu@bionic-glibc-1864864:~$ apt-cache policy libc6
libc6:
  Installed: 2.27-3ubuntu1.2
  Candidate: 2.27-3ubuntu1.2
  Version table:
 *** 2.27-3ubuntu1.2 500
        500 http://br.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://br.archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        100 /var/lib/dpkg/status

It hung immediately:
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
(stuck)

Second run worked, third run got stuck again:
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
(stuck)

With updated glibc:
ubuntu@bionic-glibc-1864864:~$ apt-cache policy libc6
libc6:
  Installed: 2.27-3ubuntu1.3
  Candidate: 2.27-3ubuntu1.3
  Version table:
 *** 2.27-3ubuntu1.3 500
        500 http://br.archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status

Sample program doesn't hang anymore, after multiple tries, and no need to rebuild it:
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000
ubuntu@bionic-glibc-1864864:~$ ./bug23844wr
trylock_wr
500000

bionic verification succeeded