This is a note to let you know that I've just added the patch titled
siox: fix possible memory leak in siox_device_add()
to the 4.19-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:
siox-fix-possible-memory-leak-in-siox_device_add.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 566d60a9b45e6cd276a2506eaf7b688011d019b0
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Fri Nov 4 10:13:34 2022 +0800
siox: fix possible memory leak in siox_device_add()
[ Upstream commit 6e63153db50059fb78b8a8447b132664887d24e3 ]
If device_register() returns error in siox_device_add(),
the name allocated by dev_set_name() need be freed. As
comment of device_register() says, it should use put_device()
to give up the reference in the error path. So fix this
by calling put_device(), then the name can be freed in
kobject_cleanup(), and sdevice is freed in siox_device_release(),
set it to null in error path.
Fixes: bbecb07fa0af ("siox: new driver framework for eckelmann SIOX")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221104021334.618189-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
index f8c08fb9891d..e0ffef6e9386 100644
--- a/drivers/siox/siox-core.c
+++ b/drivers/siox/siox-core.c
@@ -835,6 +835,8 @@ static struct siox_device *siox_device_add(struct siox_master *smaster,
err_device_register:
/* don't care to make the buffer smaller again */
+ put_device(&sdevice->dev);
+ sdevice = NULL;
err_buf_alloc:
siox_master_unlock(smaster);
