From: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
[ Upstream commit 580031ff9952b7dbf48dedba6b56a100ae002bef ]
While reviewing the udp-iter batching patches, noticed 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@xxxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/bpf/20230328004232.2134233-1-martin.lau@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 0e1fbad17dbe3..63472c9b39ae4 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2760,7 +2760,7 @@ 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,
@@ -2919,7 +2919,7 @@ 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)
--
2.39.2
