This is a note to let you know that I've just added the patch titled
mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mtd-rawnand-cadence-fix-possible-null-ptr-deref-in-c.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ad38872d4f506daa40c8647d09b6f46c3f4f0201
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Tue Apr 26 16:49:11 2022 +0800
mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe()
[ Upstream commit a28ed09dafee20da51eb26452950839633afd824 ]
It will cause null-ptr-deref when using 'res', if platform_get_resource()
returns NULL, so move using 'res' after devm_ioremap_resource() that
will check it to avoid null-ptr-deref.
And use devm_platform_get_and_ioremap_resource() to simplify code.
Fixes: ec4ba01e894d ("mtd: rawnand: Add new Cadence NAND driver to MTD subsystem")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/20220426084913.4021868-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/mtd/nand/raw/cadence-nand-controller.c b/drivers/mtd/nand/raw/cadence-nand-controller.c
index 7eec60ea9056..0d72672f8b64 100644
--- a/drivers/mtd/nand/raw/cadence-nand-controller.c
+++ b/drivers/mtd/nand/raw/cadence-nand-controller.c
@@ -2983,11 +2983,10 @@ static int cadence_nand_dt_probe(struct platform_device *ofdev)
if (IS_ERR(cdns_ctrl->reg))
return PTR_ERR(cdns_ctrl->reg);
- res = platform_get_resource(ofdev, IORESOURCE_MEM, 1);
- cdns_ctrl->io.dma = res->start;
- cdns_ctrl->io.virt = devm_ioremap_resource(&ofdev->dev, res);
+ cdns_ctrl->io.virt = devm_platform_get_and_ioremap_resource(ofdev, 1, &res);
if (IS_ERR(cdns_ctrl->io.virt))
return PTR_ERR(cdns_ctrl->io.virt);
+ cdns_ctrl->io.dma = res->start;
dt->clk = devm_clk_get(cdns_ctrl->dev, "nf_clk");
if (IS_ERR(dt->clk))
