From: Miaoqian Lin <linmq006@gmail.com> stable inclusion from stable-v4.19.256 commit d10855876a6f47add6ff621cef25cc0171dac162 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ICGA0V CVE: CVE-2022-50160 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 77087a04c8fd554134bddcb8a9ff87b21f357926 ] of_find_matching_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak. Fixes: b0afd44bc192 ("mtd: physmap_of: add a hook for Versatile write protection") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220523143255.4376-1-linmq006@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yi Yang <yiyang13@huawei.com> --- drivers/mtd/maps/physmap_of_versatile.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mtd/maps/physmap_of_versatile.c b/drivers/mtd/maps/physmap_of_versatile.c index 03f2b6e7bc7e..93cfe4071ea4 100644 --- a/drivers/mtd/maps/physmap_of_versatile.c +++ b/drivers/mtd/maps/physmap_of_versatile.c @@ -107,6 +107,7 @@ static int ap_flash_init(struct platform_device *pdev) return -ENODEV; } ebi_base = of_iomap(ebi, 0); + of_node_put(ebi); if (!ebi_base) return -ENODEV; -- 2.25.1