Hi,
Static analysis of linux-next with Coverity has found a potential null
pointer dereference issue with the following commit:
commit 1b5c1be2c88e8445a20fa1929e26c37e7ca8c926
Author: Nishanth Menon <nm@xxxxxx>
Date: Mon Oct 29 15:01:45 2012 -0500
PM / devfreq: map devfreq drivers to governor using name
The analysis is as follows for devfreq_remove_governor in
drivers/devfreq/devfreq.c
1312
deref_ptr_in_call: Dereferencing pointer devfreq->governor.
1313 if (!strncmp(devfreq->governor->name, governor->name,
1314 DEVFREQ_NAME_LEN)) {
1315 /* we should have a devfreq governor! */
Dereference before null check (REVERSE_INULL)
check_after_deref: Null-checking devfreq->governor suggests that it may
be null, but it has already been dereferenced on all paths leading to
the check.
1316 if (!devfreq->governor) {
1317 dev_warn(dev, "%s: Governor %s NOT
present\n",
1318 __func__, governor->name);
1319 continue;
1320 /* Fall through */
So devfreq->governor->name is dereferencing devfreq->governor before a
null check on devfreq->governor
Colin
