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perf tools: Fix out-of-bound access to struct perf_session 

If filename is NULL there is an out-of-bound access to struct
perf_session if it would be used with perf_session__open(). Shouldn't
actually happen in current implementation as filename is always !NULL.
Fixing this by always null-terminating filename.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-3-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Robert Richter 2011-12-07 10:02:52 +01:00 committed by Arnaldo Carvalho de Melo
parent f7a8a13364
commit 002c4fd92d
2 changed files with 2 additions and 2 deletions
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2
tools/perf/util/session.c
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@ -107,7 +107,7 @@ struct perf_session *perf_session__new(const char *filename, int mode,
bool force, bool repipe,
struct perf_tool *tool)
{
size_t len = filename ? strlen(filename) + 1 : 0;
size_t len = filename ? strlen(filename) : 0;
struct perf_session *self = zalloc(sizeof(*self) + len);
if (self == NULL)

2
tools/perf/util/session.h
View File

@ -50,7 +50,7 @@ struct perf_session {
int cwdlen;
char *cwd;
struct ordered_samples ordered_samples;
char filename[0];
char filename[1];
};
struct perf_tool;