Re: [PATCH] nfsd: Drop the client reference in client_states_open()

["Chuck Lever" <cel@kernel.org>]

On Sat, Dec 6, 2025, at 2:38 AM, Haoxiang Li wrote:
> In error path, call drop_client() to drop the reference
> obtained by get_nfsdfs_clp().
>
> Fixes: a204f25e372d ("nfsd: create get_nfsdfs_clp helper")

An argument could be made that 78599c42ae3c ("nfsd4: add file
to display list of client's opens") is where the reference
counting was first broken. Would you mind if I updated the
Fixes: tag when I apply this?


> Cc: stable@vger.kernel.org
> Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
> ---
>  fs/nfsd/nfs4state.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index 8a6960500217..caa0756b6914 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -3097,8 +3097,10 @@ static int client_states_open(struct inode 
> *inode, struct file *file)
>  		return -ENXIO;
> 
>  	ret = seq_open(file, &states_seq_ops);
> -	if (ret)
> +	if (ret) {
> +		drop_client(clp);
>  		return ret;
> +	}
>  	s = file->private_data;
>  	s->private = clp;
>  	return 0;
> -- 
> 2.25.1

-- 
Chuck Lever