From: Aurelien Aptel <aaptel@xxxxxxxx>
commit af3ef3b1031634724a3763606695ebcd113d782b upstream.
If CONFIG_CIFS_ROOT is not set, rootfs mount option is invalid
Signed-off-by: Aurelien Aptel <aaptel@xxxxxxxx>
CC: <stable@xxxxxxxxxxxxxxx> # v5.11
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/fs_context.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/cifs/fs_context.c
+++ b/fs/cifs/fs_context.c
@@ -1175,9 +1175,11 @@ static int smb3_fs_context_parse_param(s
pr_warn_once("Witness protocol support is experimental\n");
break;
case Opt_rootfs:
-#ifdef CONFIG_CIFS_ROOT
- ctx->rootfs = true;
+#ifndef CONFIG_CIFS_ROOT
+ cifs_dbg(VFS, "rootfs support requires CONFIG_CIFS_ROOT config option\n");
+ goto cifs_parse_mount_err;
#endif
+ ctx->rootfs = true;
break;
case Opt_posixpaths:
if (result.negated)
