Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 022/141] perf cpu_map: Align cpu map synthesized events properly. | Date | Sun, 11 Nov 2018 14:24:41 -0800 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: David Miller <davem@davemloft.net>
[ 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> --- tools/perf/util/event.c | 1 + 1 file changed, 1 insertion(+)
--- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -839,6 +839,7 @@ void *cpu_map_data__alloc(struct cpu_map } *size += sizeof(struct cpu_map_data); + *size = PERF_ALIGN(*size, sizeof(u64)); return zalloc(*size); }
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