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authorElena Reshetova <elena.reshetova@intel.com>2017-02-21 17:35:01 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-03-03 19:07:15 -0300
commit25a3720cf45779900246ec17e238fbb674ce4e67 (patch)
tree45bff0b406fa3fed1fabe8930353c2e4bab803f1 /tools/perf/util/evlist.h
parentead05e8f3fffe2860f0f8d1c23d74c526e9f2a3c (diff)
downloadlinux-25a3720cf45779900246ec17e238fbb674ce4e67.tar.bz2
perf evlist: Convert perf_map.refcnt from atomic_t to refcount_t
The refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Kook <keescook@chromium.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: David Windsor <dwindsor@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hans Liljestrand <ishkamiel@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kees Kook <keescook@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matija Glavinic Pecotic <matija.glavinic-pecotic.ext@nokia.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: alsa-devel@alsa-project.org Link: http://lkml.kernel.org/r/1487691303-31858-8-git-send-email-elena.reshetova@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evlist.h')
-rw-r--r--tools/perf/util/evlist.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 389b9ccdf8c7..39942995f537 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -1,7 +1,7 @@
#ifndef __PERF_EVLIST_H
#define __PERF_EVLIST_H 1
-#include <linux/atomic.h>
+#include <linux/refcount.h>
#include <linux/list.h>
#include <api/fd/array.h>
#include <stdio.h>
@@ -29,7 +29,7 @@ struct perf_mmap {
void *base;
int mask;
int fd;
- atomic_t refcnt;
+ refcount_t refcnt;
u64 prev;
struct auxtrace_mmap auxtrace_mmap;
char event_copy[PERF_SAMPLE_MAX_SIZE] __attribute__((aligned(8)));