Bug 1544700 (CVE-2015-9016)

Summary:	CVE-2015-9016 kernel: Race condition in block/blk-mq.c:blk_mq_tag_to_rq() can lead to kernel oops
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, airlied, ajax, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.3	Doc Type:	If docs needed, set a value
Doc Text:	A race condition was found in the block multi queue subsystem of the Linux kernel. This may lead to a kernel panic or have another unknown side affect.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-02-22 13:22:46 UTC	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:
Bug Blocks:	1544702

Description Adam Mariš 2018-02-13 10:36:30 UTC

Race condition was found in block/blk-mq.c in blk_mq_tag_to_rq() function that can lead to kernel oops or possible disk write corruption by removing tagged writes intended to be flushed.


Upstream patch:

https://github.com/torvalds/linux/commit/0048b4837affd153897ed1222283492070027aa9

Reference:

https://source.android.com/security/bulletin/2018-02-01#kernel-components

Comment 2 Wade Mealing 2018-02-20 02:49:43 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux.