The patch below does not apply to the 5.13-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From b946dbcfa4df80ec81b442964e07ad37000cc059 Mon Sep 17 00:00:00 2001

From: Ronnie Sahlberg lsahlber@redhat.com Date: Wed, 28 Jul 2021 16:38:29 +1000 Subject: [PATCH] cifs: add missing parsing of backupuid

We lost parsing of backupuid in the switch to new mount API. Add it back.

Signed-off-by: Ronnie Sahlberg lsahlber@redhat.com Reviewed-by: Shyam Prasad N sprasad@microsoft.com Cc: stable@vger.kernel.org # v5.11+ Reported-by: Xiaoli Feng xifeng@redhat.com Signed-off-by: Steve French stfrench@microsoft.com

diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c index 9a59d7ff9a11..eed59bc1d913 100644 --- a/fs/cifs/fs_context.c +++ b/fs/cifs/fs_context.c @@ -925,6 +925,13 @@ static int smb3_fs_context_parse_param(struct fs_context *fc, ctx->cred_uid = uid; ctx->cruid_specified = true; break; + case Opt_backupuid: + uid = make_kuid(current_user_ns(), result.uint_32); + if (!uid_valid(uid)) + goto cifs_parse_mount_err; + ctx->backupuid = uid; + ctx->backupuid_specified = true; + break; case Opt_backupgid: gid = make_kgid(current_user_ns(), result.uint_32); if (!gid_valid(gid))