This bug was fixed in the package linux - 5.13.0-44.49
---------------
linux (5.13.0-44.49) impish; urgency=medium
* impish/linux: 5.13.0-44.49 -proposed tracker (LP: #1973941)
* CVE-2022-29581
- net/sched: cls_u32: fix netns refcount changes in u32_change()
* Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP
option (LP: #1972740)
- ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE
* ext4: limit length to bitmap_maxbytes (LP: #1972281)
- ext4: limit length to bitmap_maxbytes - blocksize in punch_hole
-- Kleber Sacilotto de Souza <kleber.so...@canonical.com> Wed, 18 May
2022 14:56:02 +0200
** Changed in: linux (Ubuntu Jammy)
Status: Fix Committed => Fix Released
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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 Released
Status in linux source package in Focal:
Fix Released
Status in linux source package in Impish:
Fix Released
Status in linux source package in Jammy:
Fix Released
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 <tadeusz.st...@linaro.org>
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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