Re: [PATCH 01/06] 9p: fix fid refcount leak in v9fs_vfs_atomic_open_dotl

Tyler Hicks
2022-06-13T19:01:49Z

On 2022-06-12 17:53:24, Dominique Martinet wrote:
> We need to release directory fid if we fail halfway through open
>
> This fixes fid leaking with xfstests generic 531
>
> Fixes: 6636b6dcc3db ("9p: add refcount to p9_fid struct")
> Cc: stable@vger.kernel.org
> Reported-by: Tyler Hicks <tyhicks@linux.microsoft.com>

Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>

Tyler

> Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
> ---
> fs/9p/vfs_inode_dotl.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
> index d17502a738a9..b6eb1160296c 100644
> --- a/fs/9p/vfs_inode_dotl.c
> +++ b/fs/9p/vfs_inode_dotl.c
> @@ -274,6 +274,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
> if (IS_ERR(ofid)) {
> err = PTR_ERR(ofid);
> p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
> + p9_client_clunk(dfid);
> goto out;
> }
>
> @@ -285,6 +286,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
> if (err) {
> p9_debug(P9_DEBUG_VFS, "Failed to get acl values in creat %d\n",
> err);
> + p9_client_clunk(dfid);
> goto error;
> }
> err = p9_client_create_dotl(ofid, name, v9fs_open_to_dotl_flags(flags),
> @@ -292,6 +294,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
> if (err < 0) {
> p9_debug(P9_DEBUG_VFS, "p9_client_open_dotl failed in creat %d\n",
> err);
> + p9_client_clunk(dfid);
> goto error;
> }
> v9fs_invalidate_inode_attr(dir);
> --
> 2.35.1
>