[Bug 1953431] Re: [SRU] fix unsafe access in unregister_conn()
James Page
1953431 at bugs.launchpad.net
Fri Mar 18 14:51:19 UTC 2022
This bug is included in 15.2.16 - see bug 1964802
** Changed in: ceph (Ubuntu)
Status: In Progress => Won't Fix
** Changed in: ceph (Ubuntu Focal)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1953431
Title:
[SRU] fix unsafe access in unregister_conn()
Status in ceph package in Ubuntu:
Won't Fix
Status in ceph source package in Focal:
Won't Fix
Bug description:
[Impact]
without holding sufficient locks, accept_conn and shutdown_connections in AsyncMessenger could cause OSD processes crash
[Test plan]
run ceph_test_async_networkstack repeatedly, this will trigger many async messenger events and make sure
1. OSD process not crash
2. no deadlock
[Where problems could occur]
hold sufficient locks and decrement l_msgr_active_connections can avoid OSD processes to crash due to race condition
The only problem I can imagine is deadlock if one process is holding lock A and wait for lock B, the there is another process holding lock B and wait for lock A
[Other info]
from upstream:
octopus backport tracker
https://tracker.ceph.com/issues/50482
octopus backport PR
https://github.com/ceph/ceph/pull/43325
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