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, 2 insertions, 2 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 2f33ca9899bd..7400e5147e13 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -288,7 +288,7 @@ int event__synthesize_kernel_mmap(event__handler_t process,
          */
         struct process_symbol_args args = { .name = symbol_name, };
 
-        mmap_name = machine__mmap_name(machine, name_buff);
+        mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff));
         if (machine__is_host(machine)) {
                 /*
                  * kernel uses PERF_RECORD_MISC_USER for user space maps,
@@ -399,7 +399,7 @@ static int event__process_kernel_mmap(event_t *self,
                 goto out_problem;
         }
 
-        machine__mmap_name(machine, kmmap_prefix);
+        machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
         if (machine__is_host(machine))
                 kernel_type = DSO_TYPE_KERNEL;
         else