** Changed in: linux (Ubuntu Impish)
Status: In Progress => Fix Committed
** Changed in: linux (Ubuntu Impish)
Assignee: (unassigned) => Kleber Sacilotto de Souza (kleber-souza)
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https://bugs.launchpad.net/bugs/1972281
Title:
ext4: limit length to bitmap_maxbytes
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Trusty:
In Progress
Status in linux source package in Xenial:
In Progress
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Focal:
Fix Committed
Status in linux source package in Impish:
Fix Committed
Status in linux source package in Jammy:
Fix Committed
Bug description:
[Impact]
Abusing ext4_fallocate() (as a normal user) triggers a BUG()/kernel panic.
[Fix]
Apply this upstream fix:
commit 2da376228a2427501feb9d15815a45dbdbdd753e
Author: Tadeusz Struk <[email protected]>
Date: Thu Mar 31 13:05:15 2022 -0700
ext4: limit length to bitmap_maxbytes - blocksize in punch_hole
[Test]
The reporter has provided a working reproducer.
[Where problems could occur]
Upstream fix already slated for @stable inclusion.
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