Commit-ID: 946ae1d41d4b0c77b9f63b4a0393d8a1283a7f9d Gitweb: http://git.kernel.org/tip/946ae1d41d4b0c77b9f63b4a0393d8a1283a7f9d Author: Wang Nan <wangn...@huawei.com> AuthorDate: Tue, 31 May 2016 13:06:15 +0000 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Fri, 3 Jun 2016 14:53:46 -0300
perf evlist: Fix alloc_mmap() failure path If zalloc fail, setting evlist->mmap[i].fd is unsafe and perf_evlist__alloc_mmap() should bail out right after that. Signed-off-by: Wang Nan <wangn...@huawei.com> Acked-by: Masami Hiramatsu <mhira...@kernel.org> Cc: He Kuang <heku...@huawei.com> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Zefan Li <lize...@huawei.com> Cc: pi3or...@163.com Fixes: d4c6fb36ac2c ("perf evsel: Record fd into perf_mmap") Link: http://lkml.kernel.org/r/1464699975-230440-1-git-send-email-wangn...@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/evlist.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index e0f3094..1b918aa 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -946,9 +946,12 @@ static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) if (cpu_map__empty(evlist->cpus)) evlist->nr_mmaps = thread_map__nr(evlist->threads); evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); + if (!evlist->mmap) + return -ENOMEM; + for (i = 0; i < evlist->nr_mmaps; i++) evlist->mmap[i].fd = -1; - return evlist->mmap != NULL ? 0 : -ENOMEM; + return 0; } struct mmap_params {