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Date:   Wed, 16 May 2018 16:38:14 -0700
From:   John Fastabend <>
Subject: [bpf-next PATCH] bpf: sockmap,
 on update propagate errors back to userspace

When an error happens in the update sockmap element logic also pass
the err up to the user.

Fixes: e5cd3abcb31a ("bpf: sockmap, refactor sockmap routines to work with hashmap")
Signed-off-by: John Fastabend <>
 kernel/bpf/sockmap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/sockmap.c b/kernel/bpf/sockmap.c
index 79f5e89..c6de139 100644
--- a/kernel/bpf/sockmap.c
+++ b/kernel/bpf/sockmap.c
@@ -1875,7 +1875,7 @@ static int sock_map_ctx_update_elem(struct bpf_sock_ops_kern *skops,
-	return 0;
+	return err;
 int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type)

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