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| author | Hyunwoo Kim <imv4bel@gmail.com> | 2022-06-20 07:17:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-28 11:03:59 +0200 |
| commit | 1878eaf0edb8c9e58a6ca0cf31b7a647ca346be9 (patch) | |
| tree | d4c70e6c6fd41cca3f917ecca836a6a3c7da9d51 /drivers/video | |
| parent | 47c5ef29e52f5ee773f45a6b37a03b69f4f9a52a (diff) | |
| download | linux-stable-1878eaf0edb8c9e58a6ca0cf31b7a647ca346be9.tar.gz linux-stable-1878eaf0edb8c9e58a6ca0cf31b7a647ca346be9.tar.bz2 linux-stable-1878eaf0edb8c9e58a6ca0cf31b7a647ca346be9.zip | |
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/video')
| -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 7c4694d70dac..15162b37f302 100644 --- a/drivers/video/fbdev/pxa3xx-gcu.c +++ b/drivers/video/fbdev/pxa3xx-gcu.c @@ -382,7 +382,7 @@ 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. */ |