linux-kernel - [PATCH v3] drivers: mtd: Fixed breaking list in __mtd_del

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Message-Id: <20211026084919.3476294-1-andreas.oetken@siemens-energy.com>
Date:   Tue, 26 Oct 2021 10:49:19 +0200
From:   Andreas Oetken <ennoerlangen@...il.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>
Cc:     Andreas Oetken <ennoerlangen@...il.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Andreas Oetken <andreas.oetken@...mens-energy.com>,
        stable@...r.kernel.org
Subject: [PATCH v3] drivers: mtd: Fixed breaking list in __mtd_del_partition.

Not the child partition should be removed from the partition list
but the partition itself. Otherwise the partition list gets broken
and any subsequent remove operations leads to a kernel panic.

Fixes: 46b5889cc2c5 ("mtd: implement proper partition handling")
Signed-off-by: Andreas Oetken <andreas.oetken@...mens-energy.com>
Cc: stable@...r.kernel.org
---
 drivers/mtd/mtdpart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 95d47422bbf20..5725818fa199f 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -313,7 +313,7 @@ static int __mtd_del_partition(struct mtd_info *mtd)
 	if (err)
 		return err;
 
-	list_del(&child->part.node);
+	list_del(&mtd->part.node);
 	free_partition(mtd);
 
 	return 0;
-- 
2.30.2