tree 2781eada960ecdfbb407fd473b53011b30012fee
parent cb1dcc0ff4b57873210100fc9d70defa81af43d4
author Dan Rosenberg <drosenberg@vsecurity.com> 1285185909 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1285201359 -0700

drivers/video/sis/sis_main.c: prevent reading uninitialized stack memory

The FBIOGET_VBLANK device ioctl allows unprivileged users to read 16 bytes
of uninitialized stack memory, because the "reserved" member of the
fb_vblank struct declared on the stack is not altered or zeroed before
being copied back to the user.  This patch takes care of it.

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>