Bug 2132640 (CVE-2022-3424)

Summary:	CVE-2022-3424 kernel: Use after Free in gru_set_context_option leading to kernel panic
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, adscvr, airlied, alciregi, alex000young, arachman, bhu, brdeoliv, chwhite, crwood, darcari, ddepaula, debarbos, dvlasenk, ezulian, hdegoede, hkrzesin, hpa, jarod, jarodwilson, jburrell, jfaracco, jferlan, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jshortt, jstancek, jwboyer, jwyatt, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, lleshchi, lveyde, lzampier, masami256, mchehab, michal.skrivanek, mperina, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, steved, tyberry, vkumar, walters, williams
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 use-after-free flaw was found in the Linux kernel’s SGI GRU driver in the way the first gru_file_unlocked_ioctl function is called by the user, where a fail pass occurs in the gru_check_chiplet_assignment function. This flaw allows a local user to crash or potentially escalate their privileges on the system.	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:	2132961, 2137131, 2137132, 2137133, 2137134
Bug Blocks:	2126811, 2175291

Description Alex 2022-10-06 10:01:43 UTC

A use after free flaw in the Linux Kernel SGI GRU driver in drivers/misc/sgi-gru/grufile.c found. A local user can call gru_file_unlocked_ioctl with GRU_SET_CONTEXT_OPTION and then triggering error path in gru_check_context_placement function. This leads to use after free in gru_unload_context function.

Reference:
https://www.spinics.net/lists/kernel/msg4518970.html


Besides, this is a long existing bug which was introduced in 13 years ago:
https://github.com/torvalds/linux/commit/55484c45dbeca2eec7642932ec3f60f8a2d4bdbf

Comment 1 Alex 2022-10-06 10:31:02 UTC

*** Bug 2132639 has been marked as a duplicate of this bug. ***

Comment 3 Alex 2022-10-07 11:13:45 UTC

The latest candidate patch is:
https://lore.kernel.org/all/20221006152643.1694235-1-zyytlz.wz@163.com/

- received the link from the Zheng Wang , see Bug 2126411.

Comment 5 Alex 2022-10-07 11:19:22 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2132961]

Comment 7 Alex 2022-10-23 18:25:49 UTC

Updated on 2022-10-19 03:17:26 UTC:
"
Here is the newest version of patch. https://lore.kernel.org/all/20221019031445.901570-1-zyytlz.wz@163.com/
"
- received the link from the Zheng Wang , see Bug 2126411.

Comment 13 Justin M. Forbes 2023-01-19 23:05:06 UTC

This was fixed for Fedora with the 6.0.16 stable kernel update.