From: Florian Fuchs <fuchsfl@gmail.com>
Date: Mon, 18 May 2026 11:45:21 +0000 (+0200)
Subject: mtd: maps: vmu-flash: fix NULL pointer dereference in initialization
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=357e3b8e3a8769ba36eb8ec5e053e4825f1a9329;p=thirdparty%2Flinux.git

mtd: maps: vmu-flash: fix NULL pointer dereference in initialization

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.

Fixes: 47a72688fae7 ("mtd: flash mapping support for Dreamcast VMU.")
Cc: stable@vger.kernel.org
Signed-off-by: Florian Fuchs <fuchsfl@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---

diff --git a/drivers/mtd/maps/vmu-flash.c b/drivers/mtd/maps/vmu-flash.c
index b76d0609d1b7..10244e6731d0 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_obj(struct vmu_cache);
 	if (!pcache)