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| author | Jakub Sitnicki <jakub@cloudflare.com> | 2021-07-14 18:47:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-28 15:35:37 +0300 |
| commit | 3b5b0afd8d97b0e98e5dc91526414e9d27c08027 (patch) | |
| tree | e75b63fced66796197fcc47fd88830acb15197ee /net/ipv4 | |
| parent | c260442431b4a9bb17e0ae4b727cc6838bea5f33 (diff) | |
| download | linux-3b5b0afd8d97b0e98e5dc91526414e9d27c08027.tar.xz | |
bpf, sockmap, udp: sk_prot needs inuse_idx set for proc stats
[ Upstream commit 54ea2f49fd9400dd698c25450be3352b5613b3b4 ]
The proc socket stats use sk_prot->inuse_idx value to record inuse sock
stats. We currently do not set this correctly from sockmap side. The
result is reading sock stats '/proc/net/sockstat' gives incorrect values.
The socket counter is incremented correctly, but because we don't set the
counter correctly when we replace sk_prot we may omit the decrement.
To get the correct inuse_idx value move the core_initcall that initializes
the UDP proto handlers to late_initcall. This way it is initialized after
UDP has the chance to assign the inuse_idx value from the register protocol
handler.
Fixes: edc6741cc660 ("bpf: Add sockmap hooks for UDP sockets")
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210714154750.528206-1-jakub@cloudflare.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/udp_bpf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/udp_bpf.c b/net/ipv4/udp_bpf.c index 7a94791efc1a..69c9663f9ee7 100644 --- a/net/ipv4/udp_bpf.c +++ b/net/ipv4/udp_bpf.c @@ -39,7 +39,7 @@ static int __init udp_bpf_v4_build_proto(void) udp_bpf_rebuild_protos(&udp_bpf_prots[UDP_BPF_IPV4], &udp_prot); return 0; } -core_initcall(udp_bpf_v4_build_proto); +late_initcall(udp_bpf_v4_build_proto); struct proto *udp_bpf_get_proto(struct sock *sk, struct sk_psock *psock) { |