[tip:perf/urgent] perf tools: Fix find_perf_probe_point_from_map( ) which incorrectly returns success

[tip-bot for Wang Nan]

Commit-ID:  98d3b258ede2cdac31a2728543f652964e597e79
Gitweb: http://git.kernel.org/tip/98d3b258ede2cdac31a2728543f652964e597e79
Author: Wang Nan 
AuthorDate: Thu, 5 Nov 2015 13:19:25 +
Committer:  Arnaldo Carvalho de Melo 
CommitDate: Thu, 5 Nov 2015 12:47:52 -0300

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 
Cc: Jiri Olsa 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Cc: Zefan Li 
Cc: pi3or...@163.com
Link: 
http://lkml.kernel.org/r/1446729565-27592-3-git-send-email-wangn...@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo 
---
 tools/perf/util/probe-event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index b51a8bf..e659c4f 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, );
}
}
+
+   /* ret may has be overwritten so reset it */
+   ret = -ENOENT;
if (!sym)
goto out;
 
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[tip:perf/urgent] perf tools: Fix find_perf_probe_point_from_map( ) which incorrectly returns success

[tip-bot for Wang Nan]

Commit-ID:  98d3b258ede2cdac31a2728543f652964e597e79
Gitweb: http://git.kernel.org/tip/98d3b258ede2cdac31a2728543f652964e597e79
Author: Wang Nan 
AuthorDate: Thu, 5 Nov 2015 13:19:25 +
Committer:  Arnaldo Carvalho de Melo 
CommitDate: Thu, 5 Nov 2015 12:47:52 -0300

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 
Cc: Jiri Olsa 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Cc: Zefan Li 
Cc: pi3or...@163.com
Link: 
http://lkml.kernel.org/r/1446729565-27592-3-git-send-email-wangn...@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo 
---
 tools/perf/util/probe-event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index b51a8bf..e659c4f 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, );
}
}
+
+   /* ret may has be overwritten so reset it */
+   ret = -ENOENT;
if (!sym)
goto out;
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/