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| author | Alan <gnomes@lxorguk.ukuu.org.uk> | 2016-02-15 20:09:46 +0100 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2016-02-19 07:12:39 +0100 |
| commit | a4de018d2b0364e40a626fa521ec21e31a10ac84 (patch) | |
| tree | e8977ba2b54a4cf8a8f4a87ad479d74e270ae6aa /drivers | |
| parent | Linux 4.5-rc4 (diff) | |
| download | linux-a4de018d2b0364e40a626fa521ec21e31a10ac84.tar.xz linux-a4de018d2b0364e40a626fa521ec21e31a10ac84.zip | |
usb: chipidea: error on overflow for port_test_write
The write value is 8bit, but currently writing a larger number
(eg a doubled digit) is not errored but instead gets cast and
sets off an action probably undesired.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
(Change the style of commit log to fix checkpatch.pl warning)
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/debug.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index a4f7db2e18dd..df47110bad2d 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -100,6 +100,9 @@ static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, if (sscanf(buf, "%u", &mode) != 1) return -EINVAL; + if (mode > 255) + return -EBADRQC; + pm_runtime_get_sync(ci->dev); spin_lock_irqsave(&ci->lock, flags); ret = hw_port_test_set(ci, mode); |