| Message ID | 20241004121924.27174-1-m.lobanov@rosalinux.ru |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] V4L/DVB (13661): rj54n1cb0c: possible integer overflow fix | expand |
diff --git a/drivers/media/i2c/rj54n1cb0c.c b/drivers/media/i2c/rj54n1cb0c.c index a59db10153cd..a612ec1e7157 100644 --- a/drivers/media/i2c/rj54n1cb0c.c +++ b/drivers/media/i2c/rj54n1cb0c.c @@ -776,8 +776,8 @@ static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h, } /* Antiflicker */ - peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz / - 10000; + peak = 12 * RJ54N1_MAX_WIDTH * resize / rj54n1->tgclk_mhz / 10000; + peak *= 1 << 14; peak_50 = peak / 6; peak_60 = peak / 5;
An integer overflow may occur due to arithmetic operation (multiplication) between value '314572800' and variable 'resize', where the value comes from '12 * RJ54N1_MAX_WIDTH * (1 << 14)' and when 'resize' is equal to 16319. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: a6b5f2008a3d ("V4L/DVB (13661): rj54n1cb0c: Add cropping, auto white balance, restrict sizes, add platform data") Signed-off-by: Aleksandr Burakov <a.burakov@rosalinux.ru> Signed-off-by: Mikhail Lobanov <m.lobanov@rosalinux.ru> --- v1->v2: updated multiplication operation to use shorthand assignment for improved code readability link to v1: https://lore.kernel.org/lkml/20240917140454.7880-1-a.burakov@rosalinux.ru/ drivers/media/i2c/rj54n1cb0c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)