This issue looks similar to Bug ID -- 739957, so merging the issue into same.
Thank You.

ClusterFuzz has detected this issue as fixed in range 485703:485721.

Detailed report: https://clusterfuzz.com/testcase?key=5492298761895936

Fuzzer: inferno_twister_c
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Data race ATOMIC READ 1
Crash Address: 0x7b0c00047850
Crash State:
  pthread_mutex_lock
  pa_mutex_lock
  pa_xmalloc
  
Sanitizer: thread (TSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=471546:471559
Fixed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=485703:485721

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5492298761895936


Additional requirements: Requires Gestures

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.