[PATCH 5.13 08/35] cifs: add missing parsing of backupuid

Greg Kroah-Hartman
2021-08-06T08:24:55Z

From: Ronnie Sahlberg <lsahlber@redhat.com>

[ Upstream commit b946dbcfa4df80ec81b442964e07ad37000cc059 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/cifs/fs_context.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/fs/cifs/fs_context.c b/fs/cifs/fs_context.c
index 553adfbcc22a..72742eb1df4a 100644
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -918,6 +918,13 @@ 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))
--
2.30.2