From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 117fcc3053606d8db5cef8821dca15022ae578bb ]
The "drive->dn" value is a u8 and it is controlled by root only, but it could be out of bounds here so let's check.
Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/ide/cmd64x.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c index b127ed6..9dde839 100644 --- a/drivers/ide/cmd64x.c +++ b/drivers/ide/cmd64x.c @@ -65,6 +65,9 @@ static void cmd64x_program_timings(ide_drive_t *drive, u8 mode) struct ide_timing t; u8 arttim = 0;
+ if (drive->dn >= ARRAY_SIZE(drwtim_regs)) + return; + ide_timing_compute(drive, mode, &t, T, 0);
/*