[CRIU] [PATCH 1/4] mount: convert uid and gid properties according with userns

[Pavel Emelyanov]

> @@ -889,7 +893,15 @@ static int do_opt2flag(char *opt, unsigned *flags,
>  				break;
>  			}
>  
> -		if (opts[i].opt == NULL) {
> +		if (sscanf(opt, "gid=%d", &id) == 1) {
> +			uoff += sprintf(unknown + uoff, "gid=%d", userns_gid(id));
> +			unknown[uoff] = ',';
> +			uoff++;
> +		} else if (sscanf(opt, "uid=%d", &id) == 1) {
> +			uoff += sprintf(unknown + uoff, "uid=%d", userns_uid(id));
> +			unknown[uoff] = ',';
> +			uoff++;
> +		} else if (opts[i].opt == NULL) {

First of all, the uid/gid options should be scanned for sb opts only, this
code start scanning them for mnt ones too.

Second, the sscanf()-s should both go under the if (opts[i].opt == NULL) check.

>  			if (!unknown) {
>  				pr_err("Unknown option [%s]\n", opt);
>  				return -1;
> 

-- Pavel