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tools lib traceevent: Check return value of realloc() 

If realloc() fails, it'll leak the buffer.  Also increate buffer size
only if the allocation succeeded.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1389750340-15965-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Namhyung Kim 2014-01-15 10:45:25 +09:00 committed by Arnaldo Carvalho de Melo
parent 3c6d8d8442
commit 3026bba3c3
1 changed files with 9 additions and 4 deletions
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13
tools/lib/traceevent/trace-seq.c
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@ -91,11 +91,16 @@ void trace_seq_destroy(struct trace_seq *s)
static void expand_buffer(struct trace_seq *s)
{
s->buffer_size += TRACE_SEQ_BUF_SIZE;
s->buffer = realloc(s->buffer, s->buffer_size);
if (WARN_ONCE(!s->buffer,
"Can't allocate trace_seq buffer memory"))
char *buf;
buf = realloc(s->buffer, s->buffer_size + TRACE_SEQ_BUF_SIZE);
if (WARN_ONCE(!buf, "Can't allocate trace_seq buffer memory")) {
s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
return;
}
s->buffer = buf;
s->buffer_size += TRACE_SEQ_BUF_SIZE;
}
/**