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| author | mark gross <markgross@thegnar.org> | 2010-09-09 23:20:09 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2010-09-11 00:53:05 +0200 |
| commit | 0109c2c48d062a04685638926a35ed20153fedc8 (patch) | |
| tree | 8e86dfb97b555845e99d379af6d716d5fb0ecb10 /kernel/pm_qos_params.c | |
| parent | 152e1d592071c8b312bb898bc1118b64e4aea535 (diff) | |
| download | lwn-0109c2c48d062a04685638926a35ed20153fedc8.tar.gz lwn-0109c2c48d062a04685638926a35ed20153fedc8.zip | |
PM QoS: Correct pr_debug() misuse and improve parameter checks
Correct some pr_debug() misuse and add a stronger parameter check to
pm_qos_write() for the ASCII hex value case. Thanks to Dan Carpenter
for pointing out the problem!
Signed-off-by: mark gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'kernel/pm_qos_params.c')
| -rw-r--r-- | kernel/pm_qos_params.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/pm_qos_params.c b/kernel/pm_qos_params.c index b7e4c362361b..645e541a45f6 100644 --- a/kernel/pm_qos_params.c +++ b/kernel/pm_qos_params.c @@ -389,10 +389,12 @@ static ssize_t pm_qos_power_write(struct file *filp, const char __user *buf, } else if (count == 11) { /* len('0x12345678/0') */ if (copy_from_user(ascii_value, buf, 11)) return -EFAULT; + if (strlen(ascii_value) != 10) + return -EINVAL; x = sscanf(ascii_value, "%x", &value); if (x != 1) return -EINVAL; - pr_debug(KERN_ERR "%s, %d, 0x%x\n", ascii_value, x, value); + pr_debug("%s, %d, 0x%x\n", ascii_value, x, value); } else return -EINVAL; |