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.... 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); }