commit
606185b20caf4c57d7e41e5a5ea4aff460aef2ab upstream.
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.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
[bwh: Backported to 3.2: pyra_sysfs_write_settings() doesn't define a
settings variable, so write the cast-expression inline]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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;
}
if (off != 0 || count != sizeof(struct pyra_settings))
return -EINVAL;
+ if (((struct pyra_settings const *)buf)->startup_profile >=
+ ARRAY_SIZE(pyra->profile_settings))
+ return -EINVAL;
+
mutex_lock(&pyra->pyra_lock);
difference = memcmp(buf, &pyra->settings, sizeof(struct pyra_settings));
if (difference) {