Bug 1223701 (CVE-2024-27032)

Summary:	VUL-0: CVE-2024-27032: kernel: f2fs: fix to avoid potential panic during recovery
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/403823/
Whiteboard:	CVSSv3.1:SUSE:CVE-2024-27032:5.5:(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 11:03:21 UTC

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

f2fs: fix to avoid potential panic during recovery

During recovery, if FAULT_BLOCK is on, it is possible that
f2fs_reserve_new_block() will return -ENOSPC during recovery,
then it may trigger panic.

Also, if fault injection rate is 1 and only FAULT_BLOCK fault
type is on, it may encounter deadloop in loop of block reservation.

Let's change as below to fix these issues:
- remove bug_on() to avoid panic.
- limit the loop count of block reservation to avoid potential
deadloop.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27032
https://www.cve.org/CVERecord?id=CVE-2024-27032
https://git.kernel.org/stable/c/21ec68234826b1b54ab980a8df6e33c74cfbee58
https://git.kernel.org/stable/c/8844b2f8a3f0c428b74672f9726f9950b1a7764c
https://git.kernel.org/stable/c/d034810d02a5af8eb74debe29877dcaf5f00fdd1
https://git.kernel.org/stable/c/f26091a981318b5b7451d61f99bc073a6af8db67
https://git.kernel.org/stable/c/fe4de493572a4263554903bf9c3afc5c196e15f0
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27032.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2278469

Comment 1 Carlos López 2024-05-02 11:04:18 UTC

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