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Subject: media: uapi/linux/cec.h: cec_msg_set_reply_to: zero flags Author: Hans Verkuil hverkuil-cisco@xs4all.nl Date: Wed Aug 7 09:22:10 2024 +0200
The cec_msg_set_reply_to() helper function never zeroed the struct cec_msg flags field, this can cause unexpected behavior if flags was uninitialized to begin with.
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Fixes: 0dbacebede1e ("[media] cec: move the CEC framework out of staging and to media") Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org
include/uapi/linux/cec.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h index 894fffc66f2c..b2af1dddd4d7 100644 --- a/include/uapi/linux/cec.h +++ b/include/uapi/linux/cec.h @@ -132,6 +132,8 @@ static inline void cec_msg_init(struct cec_msg *msg, * Set the msg destination to the orig initiator and the msg initiator to the * orig destination. Note that msg and orig may be the same pointer, in which * case the change is done in place. + * + * It also zeroes the reply, timeout and flags fields. */ static inline void cec_msg_set_reply_to(struct cec_msg *msg, struct cec_msg *orig) @@ -139,7 +141,9 @@ static inline void cec_msg_set_reply_to(struct cec_msg *msg, /* The destination becomes the initiator and vice versa */ msg->msg[0] = (cec_msg_destination(orig) << 4) | cec_msg_initiator(orig); - msg->reply = msg->timeout = 0; + msg->reply = 0; + msg->timeout = 0; + msg->flags = 0; }
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