On 8/1/12 4:11 AM, Jiri Olsa wrote:
+static int
+parse_callchain_opt(const struct option *opt __used, const char *arg,
+ int unset)
+{
+ struct perf_record *rec = (struct perf_record *)opt->value;
+ char *tok, *name, *saveptr = NULL;
+ char buf[20];
+ int ret = -1;
+
+ /* --no-call-graph */
+ if (unset)
+ return 0;
+
+ /* We specified default option if none is provided. */
+ BUG_ON(!arg);
+
+ /* We need buffer that we know we can write to. */
+ snprintf(buf, 20, "%s", arg);
Isn't arg the user supplied string? What if the user messes up and
passes in 20+ characters to -g argument?
David
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