On Tue, Mar 27, 2018 at 05:27:04PM -0500, Eric Sandeen wrote:
> Having only a subset of the five error_levels present in
> the log_level[] array is asking for trouble when someone
> tries to __str_log(S_PREEN ...) and overruns the array.
>
> Tie it all together in a single structure that's
> initialized together to make the mapping more obvious and
> idiot-proof.
>
> Fixes-coverity-id: 1433618
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
--D
> ---
>
> V2: i8n, keep test for PREEN in __str_log
>
> diff --git a/scrub/common.c b/scrub/common.c
> index 5a37a98..02c6c9d 100644
> --- a/scrub/common.c
> +++ b/scrub/common.c
> @@ -56,18 +56,15 @@ xfs_scrub_excessive_errors(
> return ret;
> }
>
> -static const char *err_str[] = {
> - [S_ERROR] = "Error",
> - [S_WARN] = "Warning",
> - [S_REPAIR] = "Repaired",
> - [S_INFO] = "Info",
> - [S_PREEN] = "Optimized",
> -};
> -
> -static int log_level[] = {
> - [S_ERROR] = LOG_ERR,
> - [S_WARN] = LOG_WARNING,
> - [S_INFO] = LOG_INFO,
> +static struct {
> + const char *string;
> + int loglevel;
> +} err_levels[] = {
> + [S_ERROR] = { .string = "Error", .loglevel = LOG_ERR },
> + [S_WARN] = { .string = "Warning", .loglevel = LOG_WARNING },
> + [S_REPAIR] = { .string = "Repaired", .loglevel = LOG_WARNING },
> + [S_INFO] = { .string = "Info", .loglevel = LOG_INFO },
> + [S_PREEN] = { .string = "Optimized", .loglevel = LOG_INFO }
> };
>
> /* If stream is a tty, clear to end of line to clean up progress bar. */
> @@ -106,8 +103,8 @@ __str_out(
> if (level == S_PREEN && !debug && !verbose)
> goto out_record;
>
> - fprintf(stream, "%s%s: %s: ", stream_start(stream), _(err_str[level]),
> - descr);
> + fprintf(stream, "%s%s: %s: ", stream_start(stream),
> + _(err_levels[level].string), descr);
> if (error) {
> fprintf(stream, _("%s."), strerror_r(error, buf, DESCR_BUFSZ));
> } else {
> @@ -168,11 +161,11 @@ __str_log(
> snprintf(logname, LOGNAME_BUFSZ, "%s@%s", progname, ctx->mntpoint);
> openlog(logname, LOG_PID, LOG_DAEMON);
>
> - sz = snprintf(buf, LOG_BUFSZ, "%s: ", _(err_str[level]));
> + sz = snprintf(buf, LOG_BUFSZ, "%s: ", _(err_levels[level].string));
> va_start(args, format);
> vsnprintf(buf + sz, LOG_BUFSZ - sz, format, args);
> va_end(args);
> - syslog(log_level[level], "%s", buf);
> + syslog(err_levels[level].loglevel, "%s", buf);
>
> closelog();
> }
> --
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