diff options
| author | Cong Wang <cong.wang@bytedance.com> | 2022-09-12 10:35:53 -0700 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-09-20 14:47:21 +0200 |
| commit | db4192a754ebd52300a28abe1a50dd18eae0eb12 (patch) | |
| tree | b5c8303e4305c06b00f2bc92540299c5cbac07f1 /lib/test_fortify/write_overflow-strncpy.c | |
| parent | 90fdd1c1e9c49bcb46cde589dbdee94a6977086a (diff) | |
tcp: read multiple skbs in tcp_read_skb()
Before we switched to ->read_skb(), ->read_sock() was passed with
desc.count=1, which technically indicates we only read one skb per
->sk_data_ready() call. However, for TCP, this is not true.
TCP at least has sk_rcvlowat which intentionally holds skb's in
receive queue until this watermark is reached. This means when
->sk_data_ready() is invoked there could be multiple skb's in the
queue, therefore we have to read multiple skbs in tcp_read_skb()
instead of one.
Fixes: 965b57b469a5 ("net: Introduce a new proto_ops ->read_skb()")
Reported-by: Peilin Ye <peilin.ye@bytedance.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Link: https://lore.kernel.org/r/20220912173553.235838-1-xiyou.wangcong@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'lib/test_fortify/write_overflow-strncpy.c')
0 files changed, 0 insertions, 0 deletions