netdev - RE: [PATCH 4.14] tcp: fix tcp_rtx_queue_tail in case of empty retransmit queue

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Date:   Sat, 31 Aug 2019 10:53:56 +0000
From:   maowenan <maowenan@...wei.com>
To:     David Miller <davem@...emloft.net>,
        "cpaasch@...le.com" <cpaasch@...le.com>
CC:     "jonathan.lemon@...il.com" <jonathan.lemon@...il.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "tim.froidcoeur@...sares.net" <tim.froidcoeur@...sares.net>,
        "matthieu.baerts@...sares.net" <matthieu.baerts@...sares.net>,
        "aprout@...mit.edu" <aprout@...mit.edu>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "jtl@...flix.com" <jtl@...flix.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mkubecek@...e.cz" <mkubecek@...e.cz>,
        "ncardwell@...gle.com" <ncardwell@...gle.com>,
        "sashal@...nel.org" <sashal@...nel.org>,
        "ycheng@...gle.com" <ycheng@...gle.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH 4.14] tcp: fix tcp_rtx_queue_tail in case of empty
 retransmit queue

[<ffffff90094930dc>] skb_peek_tail include/linux/skbuff.h:1516 [inline]
[<ffffff90094930dc>] tcp_write_queue_tail include/net/tcp.h:1478 [inline]
[<ffffff90094930dc>] tcp_rtx_queue_tail include/net/tcp.h:1543 [inline]
[<ffffff90094930dc>] tcp_fragment+0xc64/0xce8 net/ipv4/tcp_output.c:1175
[<ffffff90094a37f0>] tcp_write_wakeup+0x3f8/0x4a0 net/ipv4/tcp_output.c:3496
[<ffffff90094a38d0>] tcp_send_probe0+0x38/0x2d8 net/ipv4/tcp_output.c:3523
[<ffffff90094a75a0>] tcp_probe_timer net/ipv4/tcp_timer.c:343 [inline]
[<ffffff90094a75a0>] tcp_write_timer_handler+0x640/0x720 net/ipv4/tcp_timer.c:548
[<ffffff90094a76f8>] tcp_write_timer+0x78/0x1d0 net/ipv4/tcp_timer.c:562
[<ffffff90082610b0>] call_timer_fn.isra.1+0x58/0x180 kernel/time/timer.c:1144
[<ffffff90082616ec>] __run_timers kernel/time/timer.c:1218 [inline]
[<ffffff90082616ec>] run_timer_softirq+0x514/0x848 kernel/time/timer.c:1401
[<ffffff9008141a28>] __do_softirq+0x340/0x878 kernel/softirq.c:273
[<ffffff9008142890>] do_softirq_own_stack include/linux/interrupt.h:498 [inline]
[<ffffff9008142890>] invoke_softirq kernel/softirq.c:357 [inline]
[<ffffff9008142890>] irq_exit+0x170/0x370 kernel/softirq.c:391
[<ffffff900821d550>] __handle_domain_irq+0x100/0x1c0 kernel/irq/irqdesc.c:459
[<ffffff90080914a0>] handle_domain_irq include/linux/irqdesc.h:168 [inline]
[<ffffff90080914a0>] gic_handle_irq+0xd0/0x1f0 drivers/irqchip/irq-gic.c:377