From: Yang Yingliang yangyingliang@huawei.com
stable inclusion form stable-v5.10.82 commit 679eee466d0f9ffa60a2b0c6ec19be5128927f04 bugzilla: 185877 https://gitee.com/openeuler/kernel/issues/I4QU6V
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
--------------------------------
[ Upstream commit 14651496a3de6807a17c310f63c894ea0c5d858e ]
It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value.
Signed-off-by: Yang Yingliang yangyingliang@huawei.com Link: https://lore.kernel.org/r/20210915034925.2399823-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/usb/musb/tusb6010.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c index 0c2afed4131b..038307f66198 100644 --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -1103,6 +1103,11 @@ 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 */