guodeqing
eb2c32de1c
ipvs: fix the connection sync failed in some cases
...
[ Upstream commit 8210e344cc ]
The sync_thread_backup only checks sk_receive_queue is empty or not,
there is a situation which cannot sync the connection entries when
sk_receive_queue is empty and sk_rmem_alloc is larger than sk_rcvbuf,
the sync packets are dropped in __udp_enqueue_schedule_skb, this is
because the packets in reader_queue is not read, so the rmem is
not reclaimed.
Here I add the check of whether the reader_queue of the udp sock is
empty or not to solve this problem.
Fixes: 2276f58ac5 ("udp: use a separate rx queue for packet reception")
Reported-by: zhouxudong <zhouxudong8@huawei.com >
Signed-off-by: guodeqing <geffrey.guo@huawei.com >
Acked-by: Julian Anastasov <ja@ssi.bg >
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org >
Signed-off-by: Sasha Levin <sashal@kernel.org >
2020-07-29 10:18:34 +02:00
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