Re: [PATCH bpf] bpf: tcp: Use sock_gen_put instead of sock_put in bpf_iter_tcp
From: Daniel Borkmann <daniel@iogearbox.net>
Date: 2023-03-28 08:53:54
Also in:
bpf
On 3/28/23 2:42 AM, Martin KaFai Lau wrote:
From: Martin KaFai Lau <martin.lau@kernel.org>
While reviewing the udp-iter batching patches, notice the bpf_iter_tcp
calling sock_put() is incorrect. It should call sock_gen_put instead
because bpf_iter_tcp is iterating the ehash table which has the
req sk and tw sk. This patch replaces all sock_put with sock_gen_put
in the bpf_iter_tcp codepath.
Fixes: 04c7820b776f ("bpf: tcp: Bpf iter batching and lock_sock")
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>Looks like patchbot is on vacation :( The below looks good to me, so I applied it to bpf, thanks!
quoted hunk ↗ jump to hunk
net/ipv4/tcp_ipv4.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index ea370afa70ed..b9d55277cb85 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c@@ -2780,7 +2780,7 @@ static int tcp_prog_seq_show(struct bpf_prog *prog, struct bpf_iter_meta *meta, static void bpf_iter_tcp_put_batch(struct bpf_tcp_iter_state *iter) { while (iter->cur_sk < iter->end_sk) - sock_put(iter->batch[iter->cur_sk++]); + sock_gen_put(iter->batch[iter->cur_sk++]); } static int bpf_iter_tcp_realloc_batch(struct bpf_tcp_iter_state *iter,@@ -2941,7 +2941,7 @@ static void *bpf_iter_tcp_seq_next(struct seq_file *seq, void *v, loff_t *pos) * st->bucket. See tcp_seek_last_pos(). */ st->offset++; - sock_put(iter->batch[iter->cur_sk++]); + sock_gen_put(iter->batch[iter->cur_sk++]); } if (iter->cur_sk < iter->end_sk)