From: Ye Bin <[email protected]>
There is issue as follows when do setxattr with inject fault:
[localhost]#fsck.ext4 -fn /dev/sda
e2fsck 1.46.6-rc1 (12-Sep-2022)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Unattached zero-length inode 15. Clear? no
Unattached inode 15
Connect to /lost+found? no
Pass 5: Checking group summary information
/dev/sda: ********** WARNING: Filesystem still has errors **********
/dev/sda: 15/655360 files (0.0% non-contiguous), 66755/2621440 blocks
Above issue occur in 'ext4_xattr_inode_create()', if 'ext4_mark_inode_dirty()'
failed need to drop inode's i_nlink. Or will lead to inode leak.
Signed-off-by: Ye Bin <[email protected]>
---
fs/ext4/xattr.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 5c0476ff62c8..6c19d01ba261 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1465,6 +1465,9 @@ static struct inode *ext4_xattr_inode_create(handle_t *handle,
if (!err)
err = ext4_inode_attach_jinode(ea_inode);
if (err) {
+ if (ext4_xattr_inode_dec_ref(handle, ea_inode))
+ ext4_warning_inode(ea_inode,
+ "cleanup dec ref error %d", err);
iput(ea_inode);
return ERR_PTR(err);
}
--
2.31.1
On Wed, Dec 07, 2022 at 03:40:43PM +0800, Ye Bin wrote:
> Above issue occur in 'ext4_xattr_inode_create()', if 'ext4_mark_inode_dirty()'
> failed need to drop inode's i_nlink. Or will lead to inode leak.
>
What about "This occurs in ... . If ... fails, dropping i_nlink of the
inode is needed, otherwise inode leak can occur."?
--
An old man doll... just what I always wanted! - Clara
On Wed 07-12-22 15:40:43, Ye Bin wrote:
> From: Ye Bin <[email protected]>
>
> There is issue as follows when do setxattr with inject fault:
> [localhost]#fsck.ext4 -fn /dev/sda
> e2fsck 1.46.6-rc1 (12-Sep-2022)
> Pass 1: Checking inodes, blocks, and sizes
> Pass 2: Checking directory structure
> Pass 3: Checking directory connectivity
> Pass 4: Checking reference counts
> Unattached zero-length inode 15. Clear? no
>
> Unattached inode 15
> Connect to /lost+found? no
>
> Pass 5: Checking group summary information
>
> /dev/sda: ********** WARNING: Filesystem still has errors **********
>
> /dev/sda: 15/655360 files (0.0% non-contiguous), 66755/2621440 blocks
>
> Above issue occur in 'ext4_xattr_inode_create()', if 'ext4_mark_inode_dirty()'
> failed need to drop inode's i_nlink. Or will lead to inode leak.
>
> Signed-off-by: Ye Bin <[email protected]>
I think I've already given my Reviewed-by on this :). Anyway, the patch
looks good. Feel free to add:
Reviewed-by: Jan Kara <[email protected]>
Honza
> ---
> fs/ext4/xattr.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
> index 5c0476ff62c8..6c19d01ba261 100644
> --- a/fs/ext4/xattr.c
> +++ b/fs/ext4/xattr.c
> @@ -1465,6 +1465,9 @@ static struct inode *ext4_xattr_inode_create(handle_t *handle,
> if (!err)
> err = ext4_inode_attach_jinode(ea_inode);
> if (err) {
> + if (ext4_xattr_inode_dec_ref(handle, ea_inode))
> + ext4_warning_inode(ea_inode,
> + "cleanup dec ref error %d", err);
> iput(ea_inode);
> return ERR_PTR(err);
> }
> --
> 2.31.1
>
--
Jan Kara <[email protected]>
SUSE Labs, CR