From 6bdd45d795adf9e73b38ced5e7f750cd199499ff Mon Sep 17 00:00:00 2001
From: Hui Tang <tanghui20@huawei.com>
Date: Mon, 14 Nov 2022 17:02:40 +0800
Subject: [PATCH] mtd: lpddr2_nvm: Fix possible null-ptr-deref
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Git-commit: 6bdd45d795adf9e73b38ced5e7f750cd199499ff
Patch-mainline: v6.2-rc1
References: git-fixes
It will cause null-ptr-deref when resource_size(add_range) invoked,
if platform_get_resource() returns NULL.
Fixes: 96ba9dd65788 ("mtd: lpddr: add driver for LPDDR2-NVM PCM memories")
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221114090240.244172-1-tanghui20@huawei.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mtd/lpddr/lpddr2_nvm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/lpddr/lpddr2_nvm.c b/drivers/mtd/lpddr/lpddr2_nvm.c
index 367e2d906de0..e71af4c49096 100644
--- a/drivers/mtd/lpddr/lpddr2_nvm.c
+++ b/drivers/mtd/lpddr/lpddr2_nvm.c
@@ -433,6 +433,8 @@ static int lpddr2_nvm_probe(struct platform_device *pdev)
/* lpddr2_nvm address range */
add_range = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!add_range)
+ return -ENODEV;
/* Populate map_info data structure */
*map = (struct map_info) {
--
2.35.3