perf tools: Fix buffer allocation

"perf top" cores dump on my dev machine, if run from a directory
where vmlinux is present:

  *** glibc detected *** malloc(): memory corruption: 0x085670d0 ***

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: <stable@kernel.org>
LKML-Reference: <4ABB6EB7.7000002@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/tools/perf/util/module.c b/tools/perf/util/module.c
index 8f81622..0d8c85d 100644 (file)
--- a/tools/perf/util/module.c
+++ b/tools/perf/util/module.c
@@ -423,7 +423,7 @@ static int mod_dso__load_module_paths(struct mod_dso *self)
        len += strlen(uts.release);
        len += strlen("/modules.dep");
 
        len += strlen(uts.release);
        len += strlen("/modules.dep");
 

-       dpath = calloc(1, len);
+       dpath = calloc(1, len + 1);

        if (dpath == NULL)
                return err;
 
        if (dpath == NULL)
                return err;