On Mon, Mar 13, 2017 at 01:50:04PM +0300, Dan Carpenter wrote:
> The > should be >= SWITCHTEC_IOCTL_MAX_EVENTS. Otherwise we probably
> read one space beyond the end of the loop, hit a sanity check and return
> -EINVAL. This bug doesn't look super serious.
>
> Fixes: 61c2e02154a9 ("switchtec: Add IOCTLs to the Switchtec driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Since these patches are on my "next" branch but haven't been merged
anywhere else, I folded both patches into the initial commits and added a
changelog note to credit Dan.
> diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
> index 1f045c95dec6..82ae08956457 100644
> --- a/drivers/pci/switch/switchtec.c
> +++ b/drivers/pci/switch/switchtec.c
> @@ -1049,7 +1049,7 @@ static int ioctl_event_ctl(struct switchtec_dev *stdev,
> if (copy_from_user(&ctl, uctl, sizeof(ctl)))
> return -EFAULT;
>
> - if (ctl.event_id > SWITCHTEC_IOCTL_MAX_EVENTS)
> + if (ctl.event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
> return -EINVAL;
>
> if (ctl.flags & SWITCHTEC_IOCTL_EVENT_FLAG_UNUSED)
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