diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2017-10-13 10:37:28 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-10-13 16:43:33 -0300 |
| commit | 70b01dfd765dd2196d51f33a49df23954416f34a (patch) | |
| tree | d1ff4eb32d8ca165b896ed823a952d586ded10da | |
| parent | 47a74bdcbfeff543f706dc0e385eebbb5d655ed2 (diff) | |
perf hists: Fix crash in perf_hpp__reset_output_field()
Du Changbin reported crash [1] when calling perf_hpp__reset_output_field()
after unregistering field via perf_hpp__column_unregister().
This ends up in calling following list_del* sequence on
the same format:
perf_hpp__column_unregister:
list_del(&format->list);
perf_hpp__reset_output_field:
list_del_init(&fmt->list);
where the later list_del_init might touch already freed formats.
Fixing this by replacing list_del() with list_del_init() in
perf_hpp__column_unregister().
[1] http://marc.info/?l=linux-kernel&m=149059595826019&w=2
Reported-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20171013083736.15037-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/ui/hist.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c index ddb2c6fbdf91..6ee6b36bbc76 100644 --- a/tools/perf/ui/hist.c +++ b/tools/perf/ui/hist.c @@ -532,7 +532,7 @@ void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list, void perf_hpp__column_unregister(struct perf_hpp_fmt *format) { - list_del(&format->list); + list_del_init(&format->list); } void perf_hpp__cancel_cumulate(void) |