[LU-5840] Should Null pointer occurrence in mdc_unpack_acl throw a warning

Sat, 9 Oct 2021 06:39:33 +0000

A possible null pointer dereference in mdc_unpack_acl was reported and fixed in ~~LU-4787~~ / ~~LU-5150~~. While the patch in ~~LU-5150~~ just prevents the dereference, the patch in ~~LU-4787~~ in addition throws a warning. As explained in ~~LU-5150~~, I have indications that this NULL pointer occurence can indicate some FS corruption and is thus worthwhile to notice. Working with the patch in ~~LU-4787~~ for more than half a year now, judging from our experience on multiple clusters, the issue occurs rarely (actually just on one cluster so far) so I don't see a danger of log flooding.
I therefore propose to use the patch in ~~LU-4787~~.

Whamcloud Community JIRA

[LU-5840] Should Null pointer occurrence in mdc_unpack_acl throw a warning