diff options
| author | Ian Rogers <irogers@google.com> | 2024-02-10 06:17:42 +0300 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2024-02-12 23:35:26 +0300 |
| commit | 42fd623b58dbcc48310705bbf3e3d4d7c1deec29 (patch) | |
| tree | c83e8fd2ea1911d949137e0d51979a3d4675195d /tools/perf/arch | |
| parent | 659ad3492b913c9033d47cb406ac5754780875b6 (diff) | |
| download | linux-42fd623b58dbcc48310705bbf3e3d4d7c1deec29.tar.xz | |
perf maps: Get map before returning in maps__find
Finding a map is done under a lock, returning the map without a
reference count means it can be removed without notice and causing
uses after free. Grab a reference count to the map within the lock
region and return this. Fix up locations that need a map__put
following this.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: James Clark <james.clark@arm.com>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Artem Savkov <asavkov@redhat.com>
Cc: bpf@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240210031746.4057262-3-irogers@google.com
Diffstat (limited to 'tools/perf/arch')
| -rw-r--r-- | tools/perf/arch/x86/tests/dwarf-unwind.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/tests/dwarf-unwind.c b/tools/perf/arch/x86/tests/dwarf-unwind.c index 5bfec3345d59..c05c0a85dad4 100644 --- a/tools/perf/arch/x86/tests/dwarf-unwind.c +++ b/tools/perf/arch/x86/tests/dwarf-unwind.c @@ -34,6 +34,7 @@ static int sample_ustack(struct perf_sample *sample, } stack_size = map__end(map) - sp; + map__put(map); stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size; memcpy(buf, (void *) sp, stack_size); |