perf cpu_map: Align cpu map synthesized events properly.
[ Upstream commit 0ed149cf5239cc6e7e65bf00f769e8f1e91076c0 ]
The size of the resulting cpu map can be smaller than a multiple of
sizeof(u64), resulting in SIGBUS on cpus like Sparc as the next event
will not be aligned properly.
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Fixes: 6c872901af07 ("perf cpu_map: Add cpu_map event synthesize function")
Link: http://lkml.kernel.org/r/20181011.224655.716771175766946817.davem@davemloft.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index fc690fe..a19e840 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -951,6 +951,7 @@
}
*size += sizeof(struct cpu_map_data);
+ *size = PERF_ALIGN(*size, sizeof(u64));
return zalloc(*size);
}