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staging: alarm-dev: information leak in alarm_ioctl()

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Smatch complains that if we pass an invalid clock type then "ts" is
never set.  We need to check for errors earlier, otherwise we end up
passing uninitialized stack data to userspace.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2013-06-03 02:02:31 -07:00 committed by Greg Kroah-Hartman
parent 76554b87c8
commit e919b86c3b
1 changed files with 3 additions and 1 deletions
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4
drivers/staging/android/alarm-dev.c
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@ -264,6 +264,8 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
}
rv = alarm_do_ioctl(file, cmd, &ts);
if (rv)
return rv;
switch (ANDROID_ALARM_BASE_CMD(cmd)) {
case ANDROID_ALARM_GET_TIME(0):
@ -272,7 +274,7 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
break;
}
return rv;
return 0;
}
#ifdef CONFIG_COMPAT
static long alarm_compat_ioctl(struct file *file, unsigned int cmd,