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virt: sevguest: Fix return value check in alloc_shared_pages()

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If alloc_pages() fails, it returns a NULL pointer. Replace the wrong
IS_ERR() check with the proper NULL pointer check.

Fixes: fce96cf044 ("virt: Add SEV-SNP guest driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lore.kernel.org/r/20220411111213.1477853-1-yangyingliang@huawei.com
This commit is contained in:
Yang Yingliang 2022-04-11 19:12:13 +08:00 committed by Borislav Petkov
parent e720ea52e8
commit e50abbf788
1 changed files with 1 additions and 1 deletions
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2
drivers/virt/coco/sevguest/sevguest.c
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@ -581,7 +581,7 @@ static void *alloc_shared_pages(size_t sz)
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);