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From: Florian Fuchs <fuchsfl@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	linux-mtd@lists.infradead.org
Cc: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org,
	Rich Felker <dalias@libc.org>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Florian Fuchs <fuchsfl@gmail.com>
Subject: [PATCH 3/3] mtd: maps: vmu-flash: Fix NULL pointer dereference in initialization
Date: Mon, 17 Nov 2025 23:44:08 +0100	[thread overview]
Message-ID: <20251117224408.498449-4-fuchsfl@gmail.com> (raw)
In-Reply-To: <20251117224408.498449-1-fuchsfl@gmail.com>

The mtd_info contains a struct device, which must be linked to its
parent. Without this, the initialization of the MTD fails with a NULL
pointer dereference.

Signed-off-by: Florian Fuchs <fuchsfl@gmail.com>
---
 drivers/mtd/maps/vmu-flash.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c
index d0793f1b0fac..153ba6f8f769 100644
--- a/drivers/mtd/maps/vmu-flash.c
+++ b/drivers/mtd/maps/vmu-flash.c
@@ -547,6 +547,7 @@ static void vmu_queryblocks(struct mapleq *mq)
 	mpart->partition = card->partition;
 	mtd_cur->priv = mpart;
 	mtd_cur->owner = THIS_MODULE;
+	mtd_cur->dev.parent = &mdev->dev;
 
 	pcache = kzalloc(sizeof(struct vmu_cache), GFP_KERNEL);
 	if (!pcache)
-- 
2.43.0


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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Florian Fuchs <fuchsfl@gmail.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
	Richard Weinberger <richard@nod.at>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	linux-mtd@lists.infradead.org
Cc: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org,
	Rich Felker <dalias@libc.org>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Florian Fuchs <fuchsfl@gmail.com>
Subject: [PATCH 3/3] mtd: maps: vmu-flash: Fix NULL pointer dereference in initialization
Date: Mon, 17 Nov 2025 23:44:08 +0100	[thread overview]
Message-ID: <20251117224408.498449-4-fuchsfl@gmail.com> (raw)
In-Reply-To: <20251117224408.498449-1-fuchsfl@gmail.com>

The mtd_info contains a struct device, which must be linked to its
parent. Without this, the initialization of the MTD fails with a NULL
pointer dereference.

Signed-off-by: Florian Fuchs <fuchsfl@gmail.com>
---
 drivers/mtd/maps/vmu-flash.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c
index d0793f1b0fac..153ba6f8f769 100644
--- a/drivers/mtd/maps/vmu-flash.c
+++ b/drivers/mtd/maps/vmu-flash.c
@@ -547,6 +547,7 @@ static void vmu_queryblocks(struct mapleq *mq)
 	mpart->partition = card->partition;
 	mtd_cur->priv = mpart;
 	mtd_cur->owner = THIS_MODULE;
+	mtd_cur->dev.parent = &mdev->dev;
 
 	pcache = kzalloc(sizeof(struct vmu_cache), GFP_KERNEL);
 	if (!pcache)
-- 
2.43.0


  parent reply	other threads:[~2025-11-17 22:47 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-17 22:44 [PATCH 0/3] mtd: maps: vmu-flash: Fix build and runtime errors Florian Fuchs
2025-11-17 22:44 ` Florian Fuchs
2025-11-17 22:44 ` [PATCH 1/3] sh: maple: Fix build error due to missing include of linux/device.h Florian Fuchs
2025-11-17 22:44   ` Florian Fuchs
2025-11-17 22:44 ` [PATCH 2/3] mtd: maps: vmu-flash: Fix fault in unaligned fixup Florian Fuchs
2025-11-17 22:44   ` Florian Fuchs
2025-11-17 22:44 ` Florian Fuchs [this message]
2025-11-17 22:44   ` [PATCH 3/3] mtd: maps: vmu-flash: Fix NULL pointer dereference in initialization Florian Fuchs
2025-11-18  7:31 ` [PATCH 0/3] mtd: maps: vmu-flash: Fix build and runtime errors John Paul Adrian Glaubitz
2025-11-18  7:31   ` John Paul Adrian Glaubitz
2025-11-19 21:36   ` Artur Rojek
2025-11-19 21:36     ` Artur Rojek
2025-11-19 21:44     ` Florian Fuchs
2025-11-19 21:44       ` Florian Fuchs
2025-11-19 21:54       ` Artur Rojek
2025-11-19 21:54         ` Artur Rojek
2025-11-20  8:52         ` Florian Fuchs
2025-11-20  8:52           ` Florian Fuchs
2025-11-20  9:09           ` John Paul Adrian Glaubitz
2025-11-20  9:09             ` John Paul Adrian Glaubitz

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