Commit 7012eadd authored by Yang Yingliang's avatar Yang Yingliang Committed by Wang Zhaolong
Browse files

usb: musb: tusb6010: check return value after calling platform_get_resource() 

mainline inclusion
from mainline-v5.16-rc1
commit 14651496
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9FNF2
CVE: CVE-2021-47181

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=14651496a3de6807a17c310f63c894ea0c5d858e



--------------------------------

It will cause null-ptr-deref if platform_get_resource() returns NULL,
we need check the return value.

Signed-off-by: default avatarYang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210915034925.2399823-1-yangyingliang@huawei.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarWang Zhaolong <wangzhaolong1@huawei.com>
parent 8585cfc0

drivers/usb/musb/tusb6010.c

+5 −0
Original line number Diff line number Diff line
@@ -1102,6 +1102,11 @@ static int tusb_musb_init(struct musb *musb) 


	/* dma address for async dma */

	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!mem) {

		pr_debug("no async dma resource?\n");

		ret = -ENODEV;

		goto done;

	}

	musb->async = mem->start;



	/* dma address for sync dma */