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DescriptionSweet Tea Dorminy
2020-04-16 13:16:23 UTC
Description of problem:
In certain rare circumstances in either async mode, there can be an assertion failure from the VDO recovery journal from it attempting to double-enqueue a block for writing. This requires IO to be in progress and the journal to have no space; the journal attempts never to get more than halfway full, so being full is unlikely.
Version-Release number of selected component (if applicable):
6.2.2.109
How reproducible:
Exceedingly rare. Not observed except in unit tests.
Steps to Reproduce:
1. Unknown.
Actual results:
In userspace imitation in a unit test:
waitQueue.c:19: handleAssertionFailure: Assertion `(waiter->next_waiter == ((void *)0))' failed.
==7808==
==7808== Process terminating with default action of signal 6 (SIGABRT): dumping core
==7808== at 0x4B0957F: raise (in /usr/lib64/libc-2.28.so)
==7808== by 0x4AF3894: abort (in /usr/lib64/libc-2.28.so)
==7808== by 0x4AF3768: __assert_fail_base.cold.0 (in /usr/lib64/libc-2.28.so)
==7808== by 0x4B01A25: __assert_fail (in /usr/lib64/libc-2.28.so)
==7808== by 0x48BB74A: handleAssertionFailure (permassertLinuxUser.c:83)
==7808== by 0x48B530C: assertionFailed (permassert.c:24)
==7808== by 0x489F94D: enqueue_waiter (waitQueue.c:18)
==7808== by 0x488B028: schedule_block_write (recoveryJournal.c:845)
==7808== by 0x488B028: complete_write (recoveryJournal.c:1110)
The kernel assertion would look similar.
Expected results:
No assertion.
Additional info:
This bug was introduced in fixing 1657301
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (kmod-kvdo bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2020:4551