Commit af3ef3b1 authored by Aurelien Aptel's avatar Aurelien Aptel Committed by Steve French
Browse files

cifs: warn and fail if trying to use rootfs without the config option 



If CONFIG_CIFS_ROOT is not set, rootfs mount option is invalid

Signed-off-by: default avatarAurelien Aptel <aaptel@suse.com>
CC: <stable@vger.kernel.org> # v5.11
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 403dba00

fs/cifs/fs_context.c

+4 −2
Original line number Diff line number Diff line
@@ -1196,9 +1196,11 @@ static int smb3_fs_context_parse_param(struct fs_context *fc, 
		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)