This is a note to let you know that I've just added the patch titled
media: dvbdev: fix error logic at dvb_register_device()
to the 5.10-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-fix-error-logic-at-dvb_register_device.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From stable-owner@xxxxxxxxxxxxxxx Mon Jun 12 15:40:14 2023
From: ovidiu.panait@xxxxxxxxxxxxx
Date: Mon, 12 Jun 2023 16:39:06 +0300
Subject: media: dvbdev: fix error logic at dvb_register_device()
To: stable@xxxxxxxxxxxxxxx
Cc: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>, Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
Message-ID: <20230612133907.2999114-2-ovidiu.panait@xxxxxxxxxxxxx>
From: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
commit 1fec2ecc252301110e4149e6183fa70460d29674 upstream.
As reported by smatch:
drivers/media/dvb-core/dvbdev.c: drivers/media/dvb-core/dvbdev.c:510 dvb_register_device() warn: '&dvbdev->list_head' not removed from list
drivers/media/dvb-core/dvbdev.c: drivers/media/dvb-core/dvbdev.c:530 dvb_register_device() warn: '&dvbdev->list_head' not removed from list
drivers/media/dvb-core/dvbdev.c: drivers/media/dvb-core/dvbdev.c:545 dvb_register_device() warn: '&dvbdev->list_head' not removed from list
The error logic inside dvb_register_device() doesn't remove
devices from the dvb_adapter_list in case of errors.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Ovidiu Panait <ovidiu.panait@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/dvb-core/dvbdev.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/media/dvb-core/dvbdev.c
+++ b/drivers/media/dvb-core/dvbdev.c
@@ -511,6 +511,7 @@ int dvb_register_device(struct dvb_adapt
break;
if (minor == MAX_DVB_MINORS) {
+ list_del (&dvbdev->list_head);
kfree(dvbdevfops);
kfree(dvbdev);
up_write(&minor_rwsem);
@@ -531,6 +532,7 @@ int dvb_register_device(struct dvb_adapt
__func__);
dvb_media_device_free(dvbdev);
+ list_del (&dvbdev->list_head);
kfree(dvbdevfops);
kfree(dvbdev);
mutex_unlock(&dvbdev_register_lock);
@@ -546,6 +548,7 @@ int dvb_register_device(struct dvb_adapt
pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n",
__func__, adap->num, dnames[type], id, PTR_ERR(clsdev));
dvb_media_device_free(dvbdev);
+ list_del (&dvbdev->list_head);
kfree(dvbdevfops);
kfree(dvbdev);
return PTR_ERR(clsdev);
Patches currently in stable-queue which might be from stable-owner@xxxxxxxxxxxxxxx are
queue-5.10/media-dvb-core-fix-use-after-free-due-to-race-at-dvb_register_device.patch
queue-5.10/media-dvbdev-fix-memleak-in-dvb_register_device.patch
queue-5.10/media-dvbdev-fix-error-logic-at-dvb_register_device.patch
