3.2.99-rc1 review patch. If anyone has any objections, please let me know.
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From: Sean Young sean@mess.org
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 [bwh: Backported to 3.2: open-code U32_MAX] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/media/rc/ir-lirc-codec.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/media/rc/ir-lirc-codec.c +++ b/drivers/media/rc/ir-lirc-codec.c @@ -255,11 +255,14 @@ static long ir_lirc_ioctl(struct file *f if (!dev->max_timeout) return -ENOSYS;
+ /* Check for multiply overflow */ + if (val > (u32)(-1) / 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;