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UEK5 : rds_send_remove_from_sock で CPU が停止しカーネルパニックが発生する (Doc ID 2647377.1)

Last updated on MARCH 29, 2020

適用範囲:

Linux OS - バージョン Oracle Linux 7.0 以降
Linux x86-64

現象

システムが rds_send_remove_from_sock() でクラッシュしました :

[2285652.038169] INFO: rcu_sched self-detected stall on CPU
[2285652.039176] INFO: rcu_sched detected stalls on CPUs/tasks:
[2285652.039181]        75-...: (1 GPs behind) idle=4ce/140000000000001/0 softirq=247251764/247251765 fqs=10698
[2285652.039184]        81-...: (1 GPs behind) idle=982/1/0 softirq=249391784/249391785 fqs=10698
[2285652.039185]        83-...: (1 GPs behind) idle=20e/140000000000000/0 softirq=241607476/241607477 fqs=10698
[2285652.039187]        95-...: (1 GPs behind) idle=c2e/140000000000001/0 softirq=228577392/228577393 fqs=10698
[2285652.039190]        201-...: (60000 ticks this GP) idle=8ce/140000000000001/0 softirq=207089355/207089359 fqs=10698
[2285652.039194]        (detected by 198, t=60002 jiffies, g=145026198, c=145026197, q=1991665)
[2285652.039214] Sending NMI from CPU 198 to CPUs 75:        <<<<
[2285652.040258] NMI backtrace for cpu 75
[2285652.040259] CPU: 75 PID: 349912 Comm: oracle_349912_d Tainted: P           O    4.14.35-1902.5.1.4.el7uek.x86_64 #2
[2285652.040259] Hardware name: Oracle Corporation ORACLE SERVER X7-8/SMOD TOP LEVEL ASSY, BIOS 47060600 06/25/2019
[2285652.040260] task: ffff8876e23c8000 task.stack: ffffb435eb8e0000
[2285652.040260] RIP: 0010:native_queued_spin_lock_slowpath+0x16c/0x1f8
[2285652.040260] RSP: 0000:ffff8b37ff2c3d80 EFLAGS: 00000002
[2285652.040261] RAX: 0000000000000000 RBX: ffff8ab7701ce290 RCX: 0000000000000001
[2285652.040261] RDX: 0000000001580101 RSI: 0000000001300000 RDI: ffff8b37ff2e3780
[2285652.040261] RBP: ffff8b37ff2c3d98 R08: 0000000000000000 R09: ffff8886637dfc70
[2285652.040262] R10: 000000005123c401 R11: ffff88815123a000 R12: 0000000000000101
[2285652.040262] R13: 0000000000000000 R14: ffff88789b112000 R15: ffff88789b112018
[2285652.040262] FS:  00007f8d79043980(0000) GS:ffff8b37ff2c0000(0000) knlGS:0000000000000000
[2285652.040262] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[2285652.040263] CR2: 0000000018ded000 CR3: 0000004019548006 CR4: 00000000007606e0
[2285652.040263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[2285652.040263] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[2285652.040263] PKRU: 55555554
[2285652.040263] Call Trace:
[2285652.040263] Call Trace:
[2285652.040264]  <IRQ>
[2285652.040264]  queued_spin_lock_slowpath+0xb/0xf
[2285652.040264]  _raw_spin_lock+0x2e/0x32
[2285652.040264]  rds_send_remove_from_sock+0xb9/0x420 [rds]
[2285652.040264]  rds_send_path_drop_acked+0x138/0x160 [rds]
[2285652.040265]  rds_send_drop_acked+0x1f/0x30 [rds]
[2285652.040265]  rds_ib_rx+0x1ca/0x220 [rds_rdma]
[2285652.040265]  rds_ib_tasklet_fn_recv+0x30/0x40 [rds_rdma]
[2285652.040265]  tasklet_action+0x10e/0x117
[2285652.040265]  __do_softirq+0xd9/0x28d
[2285652.040266]  irq_exit+0xdf/0xe5
[2285652.040266]  do_IRQ+0x59/0xdb
[2285652.040266]  common_interrupt+0x1c2/0x382
[2285652.040266]  </IRQ>
[2285652.040266] RIP: 0033:0x4a4dfd9
[2285652.040267] RSP: 002b:00007ffcc6fa41c0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff17
[2285652.040267] RAX: 0000000000000244 RBX: 000000de4c172014 RCX: 0000000000000119
[2285652.040267] RDX: 00000000000000f7 RSI: 0000000000000ba9 RDI: 0000000000001f32
[2285652.040267] RBP: 00007ffcc6fa43b0 R08: 0000000000000915 R09: 0000000000000119
[2285652.040268] R10: 00000000000000c0 R11: 0000000000001fe8 R12: 0000000000000000
[2285652.040268] R13: 0000000000000000 R14: 000000de4c1720f4 R15: 000000de4c1722f4


変更点

システムにパッチを当て、カーネル UEK5 : 4.14.35-1902.5.1.4.el7uek にアップデートしました。

原因

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