Re: [PATCH v3] ceph: skip the memories when received a higher version of message

[Jeff Layton <jlayton@kernel.org>]

On Tue, 2022-03-01 at 22:39 +0800, xiubli@redhat.com wrote:
> From: Xiubo Li <xiubli@redhat.com>
> 
> We should skip the extra memories which are from the higher version
> just likes the libcephfs client does.
> 
> URL: https://tracker.ceph.com/issues/54430
> Signed-off-by: Xiubo Li <xiubli@redhat.com>
> ---
>  fs/ceph/mds_client.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
> index 94b4c6508044..608d077f2eeb 100644
> --- a/fs/ceph/mds_client.c
> +++ b/fs/ceph/mds_client.c
> @@ -313,6 +313,7 @@ static int parse_reply_info_lease(void **p, void *end,
>  {
>  	u8 struct_v;
>  	u32 struct_len;
> +	void *lend;
>  
>  	if (features == (u64)-1) {
>  		u8 struct_compat;
> @@ -332,6 +333,7 @@ static int parse_reply_info_lease(void **p, void *end,
>  		*altname = NULL;
>  	}
>  
> +	lend = *p + struct_len;
>  	ceph_decode_need(p, end, struct_len, bad);
>  	*lease = *p;
>  	*p += sizeof(**lease);
> @@ -347,6 +349,7 @@ static int parse_reply_info_lease(void **p, void *end,
>  			*altname_len = 0;
>  		}
>  	}
> +	*p = lend;
>  	return 0;
>  bad:
>  	return -EIO;

Feel free to fold this into the appropriate patch in wip-fscrypt if you
like...

Reviewed-by: Jeff Layton <jlayton@kernel.org>