diff options
| -rw-r--r-- | trace/ftrace.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/trace/ftrace.c b/trace/ftrace.c index 61692a8..9749543 100644 --- a/trace/ftrace.c +++ b/trace/ftrace.c @@ -53,7 +53,11 @@ bool ftrace_init(void) } if (tracefs_found) { - snprintf(path, PATH_MAX, "%s%s/tracing_on", mount_point, subdir); + if (snprintf(path, PATH_MAX, "%s%s/tracing_on", mount_point, subdir) + >= sizeof(path)) { + fprintf(stderr, "Using tracefs mountpoint would exceed PATH_MAX\n"); + return false; + } trace_fd = open(path, O_WRONLY); if (trace_fd < 0) { if (errno == EACCES) { @@ -72,7 +76,11 @@ bool ftrace_init(void) } close(trace_fd); } - snprintf(path, PATH_MAX, "%s%s/trace_marker", mount_point, subdir); + if (snprintf(path, PATH_MAX, "%s%s/trace_marker", mount_point, subdir) + >= sizeof(path)) { + fprintf(stderr, "Using tracefs mountpoint would exceed PATH_MAX\n"); + return false; + } trace_marker_fd = open(path, O_WRONLY); if (trace_marker_fd < 0) { perror("Could not open ftrace 'trace_marker' file"); |