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Subject: [media] cec: Fix runtime BUG when (CONFIG_RC_CORE && !CEC_CAP_RC)
Author: Lee Jones <lee.jones@xxxxxxxxxx>
Date: Tue Apr 4 09:32:19 2017 -0300
Currently when the RC Core is enabled (reachable) core code located
in cec_register_adapter() attempts to populate the RC structure with
a pointer to the 'parent' passed in by the caller.
Unfortunately if the caller did not specify RC capability when calling
cec_allocate_adapter(), then there will be no RC structure to populate.
This causes a "NULL pointer dereference" error.
Fixes: f51e80804f0 ("[media] cec: pass parent device in register(), not allocate()")
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # for v4.10 and up
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
drivers/media/cec/cec-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index e5070b374276..6b32a288714f 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -304,8 +304,8 @@ int cec_register_adapter(struct cec_adapter *adap,
adap->devnode.dev.parent = parent;
#if IS_REACHABLE(CONFIG_RC_CORE)
- adap->rc->dev.parent = parent;
if (adap->capabilities & CEC_CAP_RC) {
+ adap->rc->dev.parent = parent;
res = rc_register_device(adap->rc);
if (res) {