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| author |   Tommi Rantala <tommi.t.rantala@nokia.com> | 2017-03-22 15:06:22 +0200 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-03-27 15:36:27 -0300 |
| commit | b7126ef78612a3d4a37aadf39125cff048cebb9b (patch) | |
| tree | 27c578f26aafda5fe9d96f2770217d34712552bb /tools/perf/util/header.c | |
| parent | perf tests: Do not assume that readlink() returns a null terminated string (diff) | |
| download | linux-dev-b7126ef78612a3d4a37aadf39125cff048cebb9b.tar.xz linux-dev-b7126ef78612a3d4a37aadf39125cff048cebb9b.zip | |
perf utils: use sizeof(buf) - 1 in readlink() call
Ensure that we have space for the null byte in buf.
Signed-off-by: Tommi Rantala <tommi.t.rantala@nokia.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20170322130624.21881-5-tommi.t.rantala@nokia.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/header.c')
| -rw-r--r-- | tools/perf/util/header.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 05714d548584..cf22962ce725 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -378,7 +378,7 @@ static int write_cmdline(int fd, struct perf_header *h __maybe_unused, * actual atual path to perf binary */ sprintf(proc, "/proc/%d/exe", getpid()); - ret = readlink(proc, buf, sizeof(buf)); + ret = readlink(proc, buf, sizeof(buf) - 1); if (ret <= 0) return -1; |