From: Murray McAllister <murray.mcallister@insomniasec.com>
Date: Mon, 27 Mar 2017 09:12:53 +0000 (+0200)
Subject: drm/vmwgfx: NULL pointer dereference in vmw_surface_define_ioctl()
X-Git-Tag: v3.2.89~26
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20996e6d81c907b10a5ab57c4172be97cb1a7de1;p=pandora-kernel.git

drm/vmwgfx: NULL pointer dereference in vmw_surface_define_ioctl()

commit 36274ab8c596f1240c606bb514da329add2a1bcd upstream.

Before memory allocations vmw_surface_define_ioctl() checks the
upper-bounds of a user-supplied size, but does not check if the
supplied size is 0.

Add check to avoid NULL pointer dereferences.

Signed-off-by: Murray McAllister <murray.mcallister@insomniasec.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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