From: Miklos Szeredi <mszeredi@redhat.com>
Date: Thu, 14 May 2020 16:44:25 +0200
Subject: [PATCH] vfs: don't parse forbidden flags
Git-commit: 9193ae87a8af031ce2fb4116d417fff55c8a0bcc
References: bsc#1192606
Patch-mainline: v5.8-rc1

Makes little sense to keep this blacklist synced with what mount(8) parses
and what it doesn't.  E.g. it has various forms of "*atime" options, but
not "atime"...

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
 fs/fs_context.c |   28 ----------------------------
 1 file changed, 28 deletions(-)

--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -55,40 +55,12 @@ static const struct constant_table commo
 	{ "silent",	SB_SILENT },
 };
 
-static const char *const forbidden_sb_flag[] = {
-	"bind",
-	"dev",
-	"exec",
-	"move",
-	"noatime",
-	"nodev",
-	"nodiratime",
-	"noexec",
-	"norelatime",
-	"nostrictatime",
-	"nosuid",
-	"private",
-	"rec",
-	"relatime",
-	"remount",
-	"shared",
-	"slave",
-	"strictatime",
-	"suid",
-	"unbindable",
-};
-
 /*
  * Check for a common mount option that manipulates s_flags.
  */
 static int vfs_parse_sb_flag(struct fs_context *fc, const char *key)
 {
 	unsigned int token;
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(forbidden_sb_flag); i++)
-		if (strcmp(key, forbidden_sb_flag[i]) == 0)
-			return -EINVAL;
 
 	token = lookup_constant(common_set_sb_flag, key, 0);
 	if (token) {