This is a note to let you know that I've just added the patch titled
media: dvbdev: Initialize sbuf
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
media-dvbdev-initialize-sbuf.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 818e312650aa85f2e34d12db4d324e8e61ad19bd
Author: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Date: Mon Mar 25 14:50:25 2024 +0000
media: dvbdev: Initialize sbuf
[ Upstream commit 17d1316de0d7dc1bdc5d6e3ad4efd30a9bf1a381 ]
Because the size passed to copy_from_user() cannot be known beforehand,
it needs to be checked during runtime with check_object_size. That makes
gcc believe that the content of sbuf can be used before init.
Fix:
./include/linux/thread_info.h:215:17: warning: ‘sbuf’ may be used uninitialized [-Wmaybe-uninitialized]
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
index d4d903a9dc31e..ba91c6f8fe1d8 100644
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -974,7 +974,7 @@ int dvb_usercopy(struct file *file,
int (*func)(struct file *file,
unsigned int cmd, void *arg))
{
- char sbuf[128];
+ char sbuf[128] = {};
void *mbuf = NULL;
void *parg = NULL;
int err = -EINVAL;
