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video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write
authorHyunwoo Kim <imv4bel@gmail.com>
Mon, 20 Jun 2022 14:17:46 +0000 (07:17 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 28 Sep 2022 08:56:49 +0000 (10:56 +0200)
commit9556a88a16e381dbd6834da95206742d0973afc6
tree3bc7b7cb2902a6dc50f03d272aa7e5bbbcc8fc65tree | snapshot
parent13fdc1dc7d392d90de8d596fb09d2d71bce59c94commit | diff
video: fbdev: pxa3xx-gcu: Fix integer overflow in pxa3xx_gcu_write

[ Upstream commit a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7 ]

In pxa3xx_gcu_write, a count parameter of type size_t is passed to words of
type int.  Then, copy_from_user() may cause a heap overflow because it is used
as the third argument of copy_from_user().

Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/video/fbdev/pxa3xx-gcu.c diff | blob | history
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