diff options
| author | He Zhe <zhe.he@windriver.com> | 2020-03-08 13:59:17 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-05-05 22:35:29 +0300 |
| commit | 44d041b7b2c11b6739501fd3763cc6fed62cf0ed (patch) | |
| tree | cea53881a662001b49c96b11c4a7a4c13eace789 /tools/lib | |
| parent | 23cbb41c939a09a4b51eabacdb1f68af210c084d (diff) | |
| download | linux-44d041b7b2c11b6739501fd3763cc6fed62cf0ed.tar.xz | |
libperf: Add NULL pointer check for cpu_map iteration and NULL assignment for all_cpus.
A NULL pointer may be passed to perf_cpu_map__cpu and then cause a
crash, such as the one commit cb71f7d43ece ("libperf: Setup initial
evlist::all_cpus value") fix.
Signed-off-by: He Zhe <zhe.he@windriver.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kyle Meyer <meyerk@hpe.com>
Link: http://lore.kernel.org/lkml/1583665157-349023-1-git-send-email-zhe.he@windriver.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/perf/cpumap.c | 2 | ||||
| -rw-r--r-- | tools/lib/perf/evlist.c | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/tools/lib/perf/cpumap.c b/tools/lib/perf/cpumap.c index f93f4e703e4c..ca0215047c32 100644 --- a/tools/lib/perf/cpumap.c +++ b/tools/lib/perf/cpumap.c @@ -247,7 +247,7 @@ out: int perf_cpu_map__cpu(const struct perf_cpu_map *cpus, int idx) { - if (idx < cpus->nr) + if (cpus && idx < cpus->nr) return cpus->map[idx]; return -1; diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c index def55054c55b..c481b62f2ce4 100644 --- a/tools/lib/perf/evlist.c +++ b/tools/lib/perf/evlist.c @@ -125,6 +125,7 @@ void perf_evlist__exit(struct perf_evlist *evlist) perf_cpu_map__put(evlist->cpus); perf_thread_map__put(evlist->threads); evlist->cpus = NULL; + evlist->all_cpus = NULL; evlist->threads = NULL; fdarray__exit(&evlist->pollfd); } |