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| author | Hyunwoo Kim <imv4bel@gmail.com> | 2022-06-20 17:17:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-23 15:17:00 +0300 |
| commit | 06e194e1130c98f82d46beb40cdbc88a0d4fd6de (patch) | |
| tree | 92f05669285e85e0a67c0178fa2098c63710c12e /drivers | |
| parent | 3fefe614ed802ab5bb383e32a0686333bd5e6fb7 (diff) | |
| download | linux-06e194e1130c98f82d46beb40cdbc88a0d4fd6de.tar.xz | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/fbdev/pxa3xx-gcu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/video/fbdev/pxa3xx-gcu.c b/drivers/video/fbdev/pxa3xx-gcu.c index 9421d14d0eb0..9e9888e40c57 100644 --- a/drivers/video/fbdev/pxa3xx-gcu.c +++ b/drivers/video/fbdev/pxa3xx-gcu.c @@ -381,7 +381,7 @@ pxa3xx_gcu_write(struct file *file, const char *buff, struct pxa3xx_gcu_batch *buffer; struct pxa3xx_gcu_priv *priv = to_pxa3xx_gcu_priv(file); - int words = count / 4; + size_t words = count / 4; /* Does not need to be atomic. There's a lock in user space, * but anyhow, this is just for statistics. */ |