CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/commit

author	Vincenzo Maffione <vmaffione@FreeBSD.org>
	Tue, 5 Apr 2022 23:26:02 +0000 (23:26 +0000)
committer	Ed Maste <emaste@FreeBSD.org>
	Tue, 5 Apr 2022 23:26:02 +0000 (23:26 +0000)
commit	4996f46e03a442765c56b562c04c6e3ceae0104c
tree	e4616e7f173c78f9dad07fe78e0285b8fe8f9ba0	tree \| snapshot
parent	00ca345e83ada8b68e302f5406f9799209872c90	commit \| diff

netmap: Fix TOCTOU vulnerability in nmreq_copyin

The total size of the user-provided nmreq was first computed and then
trusted during the copyin. This might lead to kernel memory corruption
and escape from jails/containers.

Reported by: Lucas Leong (@_wmliang_) of Trend Micro Zero Day Initiative
Security: CVE-2022-23084
MFC after: 3 days

(cherry picked from commit 393729916564ed13f966e09129a24e6931898d12)
(cherry picked from commit 9f600a260a738d87015b2e9722b7b4f228cbd47d)

Approved by: so
Security: FreeBSD-SA-22:04.netmap