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| author | Wang Nan <wangnan0@huawei.com> | 2015-11-05 16:19:25 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-11-05 18:47:52 +0300 |
| commit | 98d3b258ede2cdac31a2728543f652964e597e79 (patch) | |
| tree | 66000c66d8c031df7cc42c5357f79cb402edbf34 | |
| parent | 956959f6b7a982b2e789a7a8fa1de437074a5eb9 (diff) | |
| download | linux-98d3b258ede2cdac31a2728543f652964e597e79.tar.xz | |
perf tools: Fix find_perf_probe_point_from_map() which incorrectly returns success
It is possible that find_perf_probe_point_from_map() fails to find a
symbol but still returns 0 because of an small error when coding:
find_perf_probe_point_from_map() set 'ret' to error code at first, but
also use it to hold return value of kernel_get_symbol_address_by_name().
This patch resets 'ret' to error even kernel_get_symbol_address_by_name()
success, so if !sym, the whole function returns error correctly.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1446729565-27592-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/probe-event.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c index b51a8bfb40f9..e659c4faddec 100644 --- a/tools/perf/util/probe-event.c +++ b/tools/perf/util/probe-event.c @@ -1905,6 +1905,9 @@ static int find_perf_probe_point_from_map(struct probe_trace_point *tp, sym = __find_kernel_function(addr, &map); } } + + /* ret may has be overwritten so reset it */ + ret = -ENOENT; if (!sym) goto out; |