Re: [patch] perf report segfault with 0-sized strings

[Vince Weaver]

probably all perf_header_strings are affected by this.  The fuzzer just 
tripped up cmdline now, which needs this fix.

Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx>

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index c24db7f4909c..631aa1911f3a 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1427,6 +1430,8 @@ static void print_cmdline(struct feat_fd *ff, FILE *fp)
 
 	fprintf(fp, "# cmdline : ");
 
+	if (ff->ph->env.cmdline_argv==NULL) return;
+
 	for (i = 0; i < nr; i++) {
 		char *argv_i = strdup(ff->ph->env.cmdline_argv[i]);
 		if (!argv_i) {