Commit-ID: b7126ef78612a3d4a37aadf39125cff048cebb9b Gitweb: http://git.kernel.org/tip/b7126ef78612a3d4a37aadf39125cff048cebb9b Author: Tommi Rantala <tommi.t.rant...@nokia.com> AuthorDate: Wed, 22 Mar 2017 15:06:22 +0200 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Mon, 27 Mar 2017 15:36:27 -0300
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.rant...@nokia.com> Cc: Alexander Shishkin <alexander.shish...@linux.intel.com> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/20170322130624.21881-5-tommi.t.rant...@nokia.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/header.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 05714d5..cf22962 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;
