From: Yang Yingliang Date: Mon, 11 Apr 2022 19:12:13 +0800 Subject: virt: sevguest: Fix return value check in alloc_shared_pages() Git-commit: e50abbf788c239d529f9ab81e325f8e8f8432c9d Patch-mainline: v5.19-rc1 References: jsc#SLE-19924, jsc#SLE-24814 If alloc_pages() fails, it returns a NULL pointer. Replace the wrong IS_ERR() check with the proper NULL pointer check. Fixes: fce96cf04430 ("virt: Add SEV-SNP guest driver") Reported-by: Hulk Robot Signed-off-by: Yang Yingliang Signed-off-by: Borislav Petkov Reviewed-by: Brijesh Singh Link: https://lore.kernel.org/r/20220411111213.1477853-1-yangyingliang@huawei.com Acked-by: Joerg Roedel --- drivers/virt/coco/sevguest/sevguest.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/virt/coco/sevguest/sevguest.c +++ b/drivers/virt/coco/sevguest/sevguest.c @@ -581,7 +581,7 @@ static void *alloc_shared_pages(size_t s int ret; page = alloc_pages(GFP_KERNEL_ACCOUNT, get_order(sz)); - if (IS_ERR(page)) + if (!page) return NULL; ret = set_memory_decrypted((unsigned long)page_address(page), npages);