Bug 1445339 (CVE-2017-8066)

Summary:	CVE-2017-8066 kernel: gs_usb.c interacts incorrectly with the CONFIG_VMAP_STACK option
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, aquini, bhu, dhoward, esammons, fhrbata, gansalmon, hwkernel-mgr, iboverma, ichavero, itamar, jforbes, jkacur, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, pholasek, plougher, rt-maint, rvrbovsk, 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:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-04-25 14:00:57 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:

Description Adam Mariš 2017-04-25 13:48:07 UTC

drivers/net/can/usb/gs_usb.c in the Linux kernel 4.9.x and 4.10.x
before 4.10.2 interacts incorrectly with the CONFIG_VMAP_STACK option,
which allows local users to cause a denial of service (system crash or
memory corruption) or possibly have unspecified other impact by
leveraging use of more than one virtual page for a DMA scatterlist.

Upstream patch:

https://github.com/torvalds/linux/commit/c919a3069c775c1c876bec55e00b2305d5125caa