Bug 2214348 (CVE-2023-3212)

Summary:	CVE-2023-3212 kernel: gfs2: NULL pointer dereference in gfs2_evict_inode()
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, swood, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.4-rc2	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the gfs2 file system in the Linux kernel. This issue occurs on corrupt gfs2 file systems when the evict code tries to reference the journal descriptor structure after it has been freed and set to NULL. This flaw allows a privileged local user to cause a kernel panic.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2214356, 2214357, 2214358, 2214359, 2214349
Bug Blocks:	2196660

Description Alex 2023-06-12 17:43:07 UTC

A flaw in the Linux Kernel found in the GFS2 file system. On corrupted gfs2 file systems the evict code can try to reference the journal descriptor structure, jdesc, after it has been freed and set to NULL. It can lead to null pointer dereference when gfs2_trans_begin being called and then fail ingfs2_evict_inode().

Reference:  
https://listman.redhat.com/archives/cluster-devel/2023-April/023914.html

Comment 1 Alex 2023-06-12 17:45:57 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2214349]

Comment 2 Justin M. Forbes 2023-06-12 17:54:27 UTC

This was fixed for Fedora with the 6.3.7 stable kernel updates.

Comment 5 Mauro Matteo Cascella 2023-06-22 08:40:56 UTC

Upstream commit:
https://github.com/torvalds/linux/commit/504a10d9e46bc37b23d0a1ae2f28973c8516e636