linux-kernel - [PATCH 4.4 24/92] ubi: Do not drop UBI device reference before using

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191204174331.646682407@linuxfoundation.org>
Date:   Wed,  4 Dec 2019 18:49:24 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pan Bian <bianpan2016@....com>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 24/92] ubi: Do not drop UBI device reference before using

From: Pan Bian <bianpan2016@....com>

[ Upstream commit e542087701f09418702673631a908429feb3eae0 ]

The UBI device reference is dropped but then the device is used as a
parameter of ubi_err. The bug is introduced in changing ubi_err's
behavior. The old ubi_err does not require a UBI device as its first
parameter, but the new one does.

Fixes: 32608703310 ("UBI: Extend UBI layer debug/messaging capabilities")
Signed-off-by: Pan Bian <bianpan2016@....com>
Reviewed-by: Boris Brezillon <boris.brezillon@...tlin.com>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/ubi/kapi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index e844887732fbd..1db375caef71b 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -227,9 +227,9 @@ out_unlock:
 out_free:
 	kfree(desc);
 out_put_ubi:
-	ubi_put_device(ubi);
 	ubi_err(ubi, "cannot open device %d, volume %d, error %d",
 		ubi_num, vol_id, err);
+	ubi_put_device(ubi);
 	return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(ubi_open_volume);
-- 
2.20.1