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authorWang Nan <wangnan0@huawei.com>2016-01-12 13:12:04 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-01-12 17:24:43 +0300
commitb0fb978e97f58ca930f7cafc4ddc264218710765 (patch)
treec6cd7445562342d75a2340163f1ae77e6c2fcbfc /tools/perf
parent8a59f3ccbc11fcb222b046a64929dd473f7dff54 (diff)
downloadlinux-b0fb978e97f58ca930f7cafc4ddc264218710765.tar.xz
perf tools: Fix mmap2 event allocation in synthesize code
perf_event__synthesize_mmap_events() issues mmap2 events, but the memory of that event is allocated using: mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); If path of mmap source file is long (near PATH_MAX), random crash would happen. Should use sizeof(mmap_event->mmap2). Fix two memory allocations. Signed-off-by: Wang Nan <wangnan0@huawei.com> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: He Kuang <hekuang@huawei.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452593524-138970-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/event.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index cd61bb1f3917..85155e91b61b 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -503,7 +503,7 @@ int perf_event__synthesize_thread_map(struct perf_tool *tool,
if (comm_event == NULL)
goto out;
- mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
+ mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
if (mmap_event == NULL)
goto out_free_comm;
@@ -577,7 +577,7 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
if (comm_event == NULL)
goto out;
- mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size);
+ mmap_event = malloc(sizeof(mmap_event->mmap2) + machine->id_hdr_size);
if (mmap_event == NULL)
goto out_free_comm;