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media: dvbdev: Initialize sbuf

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[ 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@chromium.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ricardo Ribalda 2024-03-25 14:50:25 +00:00 • committed by Ksawlii
parent 3c31323e75
commit e8d59e07ee
1 changed files with 1 additions and 1 deletions
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2
drivers/media/dvb-core/dvbdev.c
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@ -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;