diff options
| -rw-r--r-- | tools/perf/util/util.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 25849434f0a4..2c2a5c449ffd 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -419,11 +419,21 @@ out: char *perf_exe(char *buf, int len) { - int n = readlink("/proc/self/exe", buf, len); + int n; + + if (len <= 0) + return buf; + + n = readlink("/proc/self/exe", buf, len - 1); if (n > 0) { buf[n] = 0; return buf; } + if (len < (int)sizeof("perf")) { + buf[0] = '\0'; + return buf; + } + return strcpy(buf, "perf"); } |