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mtd: lpddr2_nvm: Fix possible null-ptr-deref
author
Hui Tang
<tanghui20@huawei.com>
Mon, 14 Nov 2022 09:02:40 +0000
(17:02 +0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Sat, 31 Dec 2022 12:32:12 +0000
(13:32 +0100)
[ Upstream commit
6bdd45d795adf9e73b38ced5e7f750cd199499ff
]
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
Signed-off-by: Sasha Levin <sashal@kernel.org>
drivers/mtd/lpddr/lpddr2_nvm.c
patch
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blob
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diff --git
a/drivers/mtd/lpddr/lpddr2_nvm.c
b/drivers/mtd/lpddr/lpddr2_nvm.c
index
367e2d9
..
e71af4c
100644
(file)
--- 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) {