From 43c0c03961d0b19bd225a336897606b46e0021a6 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Tue, 4 Apr 2017 09:32:19 -0300 Subject: [PATCH] [media] cec: Fix runtime BUG when (CONFIG_RC_CORE && !CEC_CAP_RC) 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 Cc: # for v4.10 and up Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- 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) {