Commit-ID:  c5765ece8a050836c6255e1276fc8e0e867078da
Gitweb:     http://git.kernel.org/tip/c5765ece8a050836c6255e1276fc8e0e867078da
Author:     Masanari Iida <standby2...@gmail.com>
AuthorDate: Thu, 15 May 2014 02:13:38 +0900
Committer:  Jiri Olsa <jo...@kernel.org>
CommitDate: Fri, 16 May 2014 09:18:51 +0200

perf session: Fix possible null pointer dereference in session.c

cppcheck detected following warning:
[tools/perf/util/session.c:1628] -> [tools/perf/util/session.c:1632]:
 (warning) Possible null pointer dereference: session - otherwise it
 is redundant to check it against null.

In order to avoide null pointer, check the pointer before use.

Signed-off-by: Masanari Iida <standby2...@gmail.com>
Link: 
http://lkml.kernel.org/r/1400087618-13628-1-git-send-email-standby2...@gmail.com
Signed-off-by: Jiri Olsa <jo...@kernel.org>
---
 tools/perf/util/session.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 55960f2..64a186e 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1625,13 +1625,14 @@ out_delete_map:
 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
                                bool full)
 {
-       int fd = perf_data_file__fd(session->file);
        struct stat st;
-       int ret;
+       int fd, ret;
 
        if (session == NULL || fp == NULL)
                return;
 
+       fd = perf_data_file__fd(session->file);
+
        ret = fstat(fd, &st);
        if (ret == -1)
                return;
--
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