tree c7166465e745e3d073bf07b578bff73cd28394a8
parent d1bf2d30728f310f72296b54f0651ecdb09cbb12
author Gustavo A. R. Silva <garsilva@embeddedor.com> 1512591615 -0600
committer MyungJoo Ham <myungjoo.ham@samsung.com> 1514853414 +0900

PM / devfreq: Fix potential NULL pointer dereference in governor_store

df->governor is being dereferenced before it is null checked,
hence there is a potential null pointer dereference.

Notice that df->governor is being null checked at line 1004:
if (df->governor) {, which implies it might be null.

Fix this by null checking df->governor before dereferencing it.

Addresses-Coverity-ID: 1401988 ("Dereference before null check")
Fixes: bcf23c79c4e4 ("PM / devfreq: Fix available_governor sysfs")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>