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bpf: fix bpf_perf_event_read() loop upper bound 

Verifier rejects programs incorrectly.

Fixes: 35578d7984 ("bpf: Implement function bpf_perf_event_read()")
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei-Chun Chao 2015-08-12 07:57:12 -07:00 committed by David S. Miller
parent dcef70704d
commit 140d8b335a
1 changed files with 1 additions and 1 deletions
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2
kernel/bpf/verifier.c
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@ -853,7 +853,7 @@ static int check_map_func_compatibility(struct bpf_map *map, int func_id)
if (!map)
return 0;
for (i = 0; i <= ARRAY_SIZE(func_limit); i++) {
for (i = 0; i < ARRAY_SIZE(func_limit); i++) {
bool_map = (map->map_type == func_limit[i].map_type);
bool_func = (func_id == func_limit[i].func_id);
/* only when map & func pair match it can continue.