perf machine: Pass buffer size to machine__mmap_name

Don't blindly assume that the size of the buffer is enough, use
snprintf.

Cc: Avi Kivity <avi@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Zhang, Yanmin <yanmin_zhang@linux.intel.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index dc046368b5cf..c9c0bdd667ac 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1856,7 +1856,7 @@ static int dso__load_guest_kernel_sym(struct dso *self, struct map *map,
 out_try_fixup:
         if (err > 0) {
                 if (kallsyms_filename != NULL) {
-                        machine__mmap_name(machine, path);
+                        machine__mmap_name(machine, path, sizeof(path));
                         dso__set_long_name(self, strdup(path));
                 }
                 map__fixup_start(map);
@@ -1961,8 +1961,8 @@ struct dso *dso__new_kernel(const char *name)
 static struct dso *dso__new_guest_kernel(struct machine *machine,
                                         const char *name)
 {
-        char buff[PATH_MAX];
-        struct dso *self = dso__new(name ?: machine__mmap_name(machine, buff));
+        char bf[PATH_MAX];
+        struct dso *self = dso__new(name ?: machine__mmap_name(machine, bf, sizeof(bf)));
 
         if (self != NULL) {
                 dso__set_short_name(self, "[guest.kernel]");