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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2021-04-15 11:27:44 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-04-23 21:03:09 +0200 |
| commit | c6f87141254d16e281e4b4431af7316895207b8f (patch) | |
| tree | 97d1fc800d5a8c67f1ead9efbae36804d62629b2 /tools/perf/util/map.c | |
| parent | perf ftrace: Fix access to pid in array when setting a pid filter (diff) | |
| download | linux-c6f87141254d16e281e4b4431af7316895207b8f.tar.xz linux-c6f87141254d16e281e4b4431af7316895207b8f.zip | |
perf map: Fix error return code in maps__clone()
Although 'err' has been initialized to -ENOMEM, but it will be reassigned
by the "err = unwind__prepare_access(...)" statement in the for loop. So
that, the value of 'err' is unknown when map__clone() failed.
Fixes: 6c502584438bda63 ("perf unwind: Call unwind__prepare_access for forked thread")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: zhen lei <thunder.leizhen@huawei.com>
Link: http://lore.kernel.org/lkml/20210415092744.3793-1-thunder.leizhen@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/map.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index fbc40a2c17d4..8af693d9678c 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -840,15 +840,18 @@ out: int maps__clone(struct thread *thread, struct maps *parent) { struct maps *maps = thread->maps; - int err = -ENOMEM; + int err; struct map *map; down_read(&parent->lock); maps__for_each_entry(parent, map) { struct map *new = map__clone(map); - if (new == NULL) + + if (new == NULL) { + err = -ENOMEM; goto out_unlock; + } err = unwind__prepare_access(maps, new, NULL); if (err) |