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| author | Sean Young <sean@mess.org> | 2017-10-08 14:18:52 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:35:53 +0000 |
| commit | 0cbab0776bd74966db8a6829b423dd42295e3580 (patch) | |
| tree | 0e9925444f944c346935b78f9902ff450d271bdd /drivers | |
| parent | d4674227f40f47734d1c1575445a4f7cee2494f8 (diff) | |
| download | linux-stable-0cbab0776bd74966db8a6829b423dd42295e3580.tar.gz linux-stable-0cbab0776bd74966db8a6829b423dd42295e3580.tar.bz2 linux-stable-0cbab0776bd74966db8a6829b423dd42295e3580.zip | |
media: rc: check for integer overflow
commit 3e45067f94bbd61dec0619b1c32744eb0de480c8 upstream.
The ioctl LIRC_SET_REC_TIMEOUT would set a timeout of 704ns if called
with a timeout of 4294968us.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/rc/ir-lirc-codec.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/media/rc/ir-lirc-codec.c b/drivers/media/rc/ir-lirc-codec.c index 98893a8332c7..080130582303 100644 --- a/drivers/media/rc/ir-lirc-codec.c +++ b/drivers/media/rc/ir-lirc-codec.c @@ -289,11 +289,14 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, if (!dev->max_timeout) return -ENOSYS; + /* Check for multiply overflow */ + if (val > U32_MAX / 1000) + return -EINVAL; + tmp = val * 1000; - if (tmp < dev->min_timeout || - tmp > dev->max_timeout) - return -EINVAL; + if (tmp < dev->min_timeout || tmp > dev->max_timeout) + return -EINVAL; dev->timeout = tmp; break; |