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Mon, 18 May 2026 04:47:12 -0700 (PDT) Received: from localhost ([2a02:810d:4a94:b300:f15c:fd38:3fe1:9653]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-48fe53ab671sm250281165e9.1.2026.05.18.04.47.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 May 2026 04:47:12 -0700 (PDT) From: Florian Fuchs To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , linux-mtd@lists.infradead.org Cc: linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Rich Felker , John Paul Adrian Glaubitz , Adrian McMenamin , Florian Fuchs , Artur Rojek Subject: [PATCH v3 3/3] mtd: maps: vmu-flash: fix NULL pointer dereference in initialization Date: Mon, 18 May 2026 13:45:21 +0200 Message-ID: <20260518114521.81564-4-fuchsfl@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260518114521.81564-1-fuchsfl@gmail.com> References: <20260518114521.81564-1-fuchsfl@gmail.com> Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- v2->v3: no functional change, added Fixes, Cc tag according to feedback v1->v2: no functional change v2: https://lore.kernel.org/lkml/20260427114750.2480900-4-fuchsfl@gmail.com/ v1: https://lore.kernel.org/lkml/20251117224408.498449-4-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 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) -- 2.43.0