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Commit 1925c902 authored by Ricardo Ribalda's avatar Ricardo Ribalda Committed by Greg Kroah-Hartman
Browse files

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: default avatarRicardo Ribalda <ribalda@chromium.org>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 40d7def6

drivers/media/dvb-core/dvbdev.c

+1 −1
Original line number Diff line number Diff line
@@ -964,7 +964,7 @@ 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;