Commit 7b99df55 authored by Yu Kuai's avatar Yu Kuai Committed by Jialin Zhang
Browse files

eulerfs: fix null-ptr-dereference when allocate page failed 

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I78RYS


CVE: NA

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

Currently, the caller of eufs_alloc_page() and eufs_zalloc_page() expect
that allocation won't fail, otherwise null_ptr_dereference will be
triggered.

Fix this problem by adding flag __GFP_NOFAIL.

Signed-off-by: default avatarYu Kuai <yukuai3@huawei.com>
Reviewed-by: default avatarHou Tao <houtao1@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parent e15e6869

fs/eulerfs/kmem_cache.c

+2 −2
Original line number Diff line number Diff line
@@ -77,11 +77,11 @@ void destroy_dep_node_cache(void) 


void *eufs_zalloc_page(void)

{

	return kmem_cache_zalloc(eufs_page_cachep, GFP_NOFS);

	return kmem_cache_zalloc(eufs_page_cachep, GFP_NOFS | __GFP_NOFAIL);

}

void *eufs_alloc_page(void)

{

	return kmem_cache_alloc(eufs_page_cachep, GFP_NOFS);

	return kmem_cache_alloc(eufs_page_cachep, GFP_NOFS | __GFP_NOFAIL);

}

void eufs_free_page(void *page)

{