oss-security - CVE request virglrenderer: null pointer dereference in vrend

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Message-ID: <alpine.LFD.2.20.1702081517590.30512@wniryva>
Date: Wed, 8 Feb 2017 15:19:27 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Li Qiang <liq3ea@...il.com>
Subject: CVE request virglrenderer: null pointer dereference in vrend_clear

   Hello,

Virgil 3d project, used by Quick Emulator(Qemu) to implement 3D GPU support 
for the virtio GPU, is vulnerable to a null pointer dereference issue. It 
could occur when a guest invokes a virgl 'VIRGL_CCMD_CLEAR' command.

A guest user/process could use this flaw to crash Qemu process resulting in 
DoS.

Upstream patch:
---------------
   -> https://cgit.freedesktop.org/virglrenderer/commit/?id=48f67f60967f963b698ec8df57ec6912a43d6282

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1420246

This issue was reported by Mr Li Qiang of 360.cn Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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