[PATCH 5.4 262/389] ext4: correct max_inline_xattr_value_size computing

Greg Kroah-Hartman
2022-08-23T11:48:09Z

From: Baokun Li <libaokun1@huawei.com>

commit c9fd167d57133c5b748d16913c4eabc55e531c73 upstream.

If the ext4 inode does not have xattr space, 0 is returned in the
get_max_inline_xattr_value_size function. Otherwise, the function returns
a negative value when the inode does not contain EXT4_STATE_XATTR.

Cc: stable@kernel.org
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220616021358.2504451-4-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ext4/inline.c | 3 +++
1 file changed, 3 insertions(+)

--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -34,6 +34,9 @@ static int get_max_inline_xattr_value_si
struct ext4_inode *raw_inode;
int free, min_offs;

+ if (!EXT4_INODE_HAS_XATTR_SPACE(inode))
+ return 0;
+
min_offs = EXT4_SB(inode->i_sb)->s_inode_size -
EXT4_GOOD_OLD_INODE_SIZE -
EXT4_I(inode)->i_extra_isize -