Bug 2266267 (CVE-2020-36775)

Summary:	CVE-2020-36775 kernel: potential deadlock in f2fs_write_single_data_page
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel. The flaw exists in f2fs_write_single_data_page due to deadlock in the Linux kernel.	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:	2266268
Bug Blocks:	2266266

Description Rohit Keshri 2024-02-27 11:37:54 UTC

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

f2fs: fix to avoid potential deadlock

Using f2fs_trylock_op() in f2fs_write_compressed_pages() to avoid potential
deadlock like we did in f2fs_write_single_data_page().

https://git.kernel.org/stable/c/0478ccdc8ea016de1ebaf6fe6da0275c2b258c5b
https://git.kernel.org/stable/c/8e8542437bb4070423c9754d5ba270ffdbae8c8d
https://git.kernel.org/stable/c/df77fbd8c5b222c680444801ffd20e8bbc90a56e

Comment 1 Rohit Keshri 2024-02-27 11:39:43 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266268]

Comment 4 Justin M. Forbes 2024-02-27 19:10:52 UTC

This was fixed for Fedora with the 5.6.7 stable kernel updates.

Comment 6 Alex 2024-06-09 13:07:20 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2020-36775 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown (where first YES/NO value means if related sources built).