From: Konstantin Komarov almaz.alexandrovich@paragon-software.com
mainline inclusion from mainline-v5.15 commit 398c35f4d78410725e154c2fc0a51ecac05a3f1f category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA
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In case of removing of xattr there must be XATTR_REPLACE flag and zero length. We already check XATTR_REPLACE in ntfs_set_ea, so now we pass XATTR_REPLACE to ntfs_set_ea.
Reviewed-by: Kari Argillander kari.argillander@gmail.com Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Yin Xiujiang yinxiujiang@kylinos.cn Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Hou Tao houtao1@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- fs/ntfs3/xattr.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c index 3795943efc8e..70f2f9eb6b1e 100644 --- a/fs/ntfs3/xattr.c +++ b/fs/ntfs3/xattr.c @@ -549,6 +549,7 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns, size_t size, name_len; void *value = NULL; int err = 0; + int flags;
if (S_ISLNK(inode->i_mode)) return -EOPNOTSUPP; @@ -591,20 +592,24 @@ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns, }
if (!acl) { + /* Remove xattr if it can be presented via mode. */ size = 0; value = NULL; + flags = XATTR_REPLACE; } else { size = posix_acl_xattr_size(acl->a_count); value = kmalloc(size, GFP_NOFS); if (!value) return -ENOMEM; - err = posix_acl_to_xattr(mnt_userns, acl, value, size); if (err < 0) goto out; + flags = 0; }
- err = ntfs_set_ea(inode, name, name_len, value, size, 0, locked); + err = ntfs_set_ea(inode, name, name_len, value, size, flags, locked); + if (err == -ENODATA && !size) + err = 0; /* Removing non existed xattr. */ if (!err) set_cached_acl(inode, type, acl);