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HID: roccat: potential out of bounds in pyra_sysfs_write_settings() 

This is a static checker fix.  We write some binary settings to the
sysfs file.  One of the settings is the "->startup_profile".  There
isn't any checking to make sure it fits into the
pyra->profile_settings[] array in the profile_activated() function.

I added a check to pyra_sysfs_write_settings() in both places because
I wasn't positive that the other callers were correct.

Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Dan Carpenter 2015-01-09 15:32:31 +03:00 committed by Jiri Kosina
parent 2bacedada6
commit 606185b20c
1 changed files with 6 additions and 2 deletions
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8
drivers/hid/hid-roccat-pyra.c
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@ -35,6 +35,8 @@ static struct class *pyra_class;
static void profile_activated(struct pyra_device *pyra,
unsigned int new_profile)
{
if (new_profile >= ARRAY_SIZE(pyra->profile_settings))
return;
pyra->actual_profile = new_profile;
pyra->actual_cpi = pyra->profile_settings[pyra->actual_profile].y_cpi;
}
@ -257,9 +259,11 @@ static ssize_t pyra_sysfs_write_settings(struct file *fp,
if (off != 0 || count != PYRA_SIZE_SETTINGS)
return -EINVAL;
mutex_lock(&pyra->pyra_lock);
settings = (struct pyra_settings const *)buf;
if (settings->startup_profile >= ARRAY_SIZE(pyra->profile_settings))
return -EINVAL;
mutex_lock(&pyra->pyra_lock);
retval = pyra_set_settings(usb_dev, settings);
if (retval) {