netdev - [PATCH v2 net-next] bpf: fix bpf_perf_event

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Date:	Wed, 12 Aug 2015 07:57:12 -0700
From:	Wei-Chun Chao <weichunc@...mgrid.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, ast@...mgrid.com, xiakaixu@...wei.com
Subject: [PATCH v2 net-next] bpf: fix bpf_perf_event_read() loop upper bound

Verifier rejects programs incorrectly.

Fixes: 35578d798400 ("bpf: Implement function bpf_perf_event_read()")
Cc: Kaixu Xia <xiakaixu@...wei.com>
Cc: Alexei Starovoitov <ast@...mgrid.com>
Signed-off-by: Wei-Chun Chao <weichunc@...mgrid.com>
---

v2: better subject line
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 48e1c71..ed12e38 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -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.
-- 
1.9.1

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