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DescriptionAndreas Gruenbacher
2021-12-07 16:00:19 UTC
Description of problem:
xfstest generic/079 fails because of incorrect permission checks in gfs2. More precisely, the vfs performs its permission checks with an unlocked inode glock, so nothing prevents the inode from changing on another node. The filesystem then takes the inode glock and tries to perform the same permission checks again, it's only that the permission checks in the vfs no longer match the copy we have in the filesystem.
Version-Release number of selected component (if applicable):
All RHEL9.
How reproducible:
Reliably.
Steps to Reproduce:
1. Run xfstest generic/079.
Actual results:
Test should pass.
Expected results:
Test fails.
Additional info:
The fix is to put the vfs permission fix into a separate function and call that function from the filesystem. Upstream:
026e2e197813 gfs2: Switch to may_setattr in gfs2_setattr
435825eb4d97 fs: Move notify_change permission checks into may_setattr
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 (new packages: kernel), 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-2022:3907