Bug 1223703 (CVE-2024-27034)

Summary:	VUL-0: CVE-2024-27034: kernel: f2fs: compress: fix to cover normal cluster write with cp_rwsem
Product:	[Novell Products] SUSE Security Incidents	Reporter:	SMASH SMASH <smash_bz>
Component:	Incidents	Assignee:	Kernel Bugs <kernel-bugs>
Status:	RESOLVED INVALID	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P5 - None	CC:	carlos.lopez
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/403825/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-27034:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description SMASH SMASH 2024-05-02 11:05:43 UTC

In the Linux kernel, the following vulnerability has been resolved:

f2fs: compress: fix to cover normal cluster write with cp_rwsem

When we overwrite compressed cluster w/ normal cluster, we should
not unlock cp_rwsem during f2fs_write_raw_pages(), otherwise data
will be corrupted if partial blocks were persisted before CP & SPOR,
due to cluster metadata wasn't updated atomically.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27034
https://www.cve.org/CVERecord?id=CVE-2024-27034
https://git.kernel.org/stable/c/2b1b14d9fc94b8feae20808684c8af28ec80f45b
https://git.kernel.org/stable/c/52982edfcefd475cc34af663d5c47c0cddaa5739
https://git.kernel.org/stable/c/542c8b3c774a480bfd0804291a12f6f2391b0cd1
https://git.kernel.org/stable/c/75abfd61392b1db391bde6d738a30d685b843286
https://git.kernel.org/stable/c/7d420eaaa18ec8e2bb4eeab8c65c00492ef6f416
https://git.kernel.org/stable/c/fd244524c2cf07b5f4c3fe8abd6a99225c76544b
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27034.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2278465

Comment 1 Carlos López 2024-05-02 11:05:58 UTC

We don't enable f2fs on any branch, so we are not affected. Closing.