FAILED: patch "[PATCH] mtd: maps: vmu-flash: fix fault in unaligned fixup" failed to apply to 6.12-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x 79d1661502c6e4b6f626185cef72cf2fa78116e1
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072054-croak-unfixed-9a14@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..'

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 79d1661502c6e4b6f626185cef72cf2fa78116e1 Mon Sep 17 00:00:00 2001
From: Florian Fuchs <fuchsfl@gmail.com>
Date: Mon, 18 May 2026 13:45:20 +0200
Subject: [PATCH] mtd: maps: vmu-flash: fix fault in unaligned fixup

Use kzalloc_obj() / kzalloc_objs() to allocate the memcard structs,
instead of kmalloc_obj() / kmalloc_objs() to prevent access to
uninitialized data.

Fixes runtime error: Fault in unaligned fixup: 0000 [#1] at
mtd_get_fact_prot_info.

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 75e06d249ce9..b76d0609d1b7 100644
--- a/drivers/mtd/maps/vmu-flash.c
+++ b/drivers/mtd/maps/vmu-flash.c
@@ -609,7 +609,7 @@ static int vmu_connect(struct maple_device *mdev)
 
 	basic_flash_data = be32_to_cpu(mdev->devinfo.function_data[c - 1]);
 
-	card = kmalloc_obj(struct memcard);
+	card = kzalloc_obj(struct memcard);
 	if (!card) {
 		error = -ENOMEM;
 		goto fail_nomem;
@@ -627,13 +627,13 @@ static int vmu_connect(struct maple_device *mdev)
 	* Not sure there are actually any multi-partition devices in the
 	* real world, but the hardware supports them, so, so will we
 	*/
-	card->parts = kmalloc_objs(struct vmupart, card->partitions);
+	card->parts = kzalloc_objs(struct vmupart, card->partitions);
 	if (!card->parts) {
 		error = -ENOMEM;
 		goto fail_partitions;
 	}
 
-	card->mtd = kmalloc_objs(struct mtd_info, card->partitions);
+	card->mtd = kzalloc_objs(struct mtd_info, card->partitions);
 	if (!card->mtd) {
 		error = -ENOMEM;
 		goto fail_mtd_info;