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Date: Wed, 11 Jan 2012 18:50:12 +0800
From: Eugene Teo <>
CC: "Steven M. Christey" <>
Subject: CVE request - kernel: drm: integer overflow in drm_mode_dirtyfb_ioctl()

There is a potential integer overflow in drm_mode_dirtyfb_ioctl() if
userspace passes in a large num_clips.  The call to kmalloc would
allocate a small buffer, and the call to fb->funcs->dirty may result in
a memory corruption.

Reported-by: Haogang Chen <>
Signed-off-by: Xi Wang <>

Upstream commit:

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