Bug #63494: all: daemonizing may release CephContext:: _fork_watchers_lock when its already unlocked - Ceph - Ceph

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Bug #63494

open

all: daemonizing may release CephContext:: _fork_watchers_lock when its already unlocked

Added by Venky Shankar 6 months ago. Updated 4 days ago.

Status:

Fix Under Review

Priority:

Normal

Assignee:

Venky Shankar

Category:

Target version:

v20.0.0

% Done:

Source:

Development

Tags:

Backport:

squid,reef,quincy

Regression:

Severity:

2 - major

Reviewed:

Affected Versions:

ceph-qa-suite:

Pull request ID:

54433

Crash signature (v1):

Crash signature (v2):

Description

Was debugging a ceph-fuse crash reported downstream which has the following backtrace:

#0  0x00007f66b42a2a4f raise (libc.so.6)
#1  0x00007f66b4275db5 abort (libc.so.6)
#2  0x00007f66b4275c89 __assert_fail_base.cold.0 (libc.so.6)
#3  0x00007f66b429b3a6 __assert_fail (libc.so.6)
#4  0x00007f66b583ccb1 __pthread_mutex_lock (libpthread.so.0)
#5  0x0000563393237387 _Z15global_pre_initPKSt3mapINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES5_St4lessIS5_ESaISt4pairIKS5_S5_EEERSt6vectorIPKcSaISH_EEj18code_environment_ti (ceph-fuse)
#6  0x0000563393239576 _Z11global_initPKSt3mapINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES5_St4lessIS5_ESaISt4pairIKS5_S5_EEERSt6vectorIPKcSaISH_EEj18code_environment_tib (ceph-fuse)
#7  0x000056339314a01e main (ceph-fuse)
#8  0x00007f66b428eca3 __libc_start_main (libc.so.6)
#9  0x000056339315173e _start (ceph-fuse)

No debug logs were available. Although the backtrace shows global_pre_init() leading into a call that involves pthread mutex (lock), I found this via code reading and might just be related to the issue.