INFO: rcu detected stall in do_wp

Kernel	Title	Repro	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	INFO: rcu detected stall in do_wp_page	syz	error	9	1489d	1627d	0/1	auto-obsoleted due to no activity on 2022/08/27 06:40
upstream	INFO: rcu detected stall in do_wp_page (3) kernel			2	1380d	1381d	0/26	auto-closed as invalid on 2020/10/07 00:48
upstream	INFO: rcu detected stall in do_wp_page (2) kernel			9	1563d	1665d	0/26	auto-closed as invalid on 2020/04/07 01:35
android-49	INFO: rcu detected stall in do_wp_page			1	1624d	1624d	0/3	auto-closed as invalid on 2020/03/07 03:26

Memory cgroup out of memory: Kill process 19650 (syz-executor2) score 1110 or sacrifice child Killed process 19650 (syz-executor2) total-vm:70740kB, anon-rss:4272kB, file-rss:32768kB, shmem-rss:0kB ip6_tunnel: xmit: Local address not yet configured! ip6_tunnel: xmit: Local address not yet configured! rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=227905, q=20) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295089066-4295078564), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor2 R running task 11288 18570 14675 0x80000002 Call Trace: <IRQ> sched_show_task.cold.84+0x2b6/0x30a kernel/sched/core.c:5293 print_other_cpu_stall.cold.66+0x7dd/0x8bb kernel/rcu/tree.c:1286 check_cpu_stall kernel/rcu/tree.c:1415 [inline] rcu_pending kernel/rcu/tree.c:2961 [inline] rcu_check_callbacks+0xfd7/0x13f0 kernel/rcu/tree.c:2506 update_process_times+0x2d/0x70 kernel/time/timer.c:1636 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:164 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1518 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 </IRQ> RIP: 0010:__sanitizer_cov_trace_switch+0x36/0x90 kernel/kcov.c:223 Code: 53 48 8b 46 08 48 83 f8 10 74 6b 76 4a 48 83 f8 20 74 5b 48 83 f8 40 41 be 07 00 00 00 75 2d 4c 8b 3e 31 db 49 89 f4 49 89 fd <4d> 85 ff 74 1d 49 8b 74 dc 10 4c 89 ea 4c 89 f7 48 83 c3 01 48 8b RSP: 0018:ffff8881631d5968 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000020 RBX: 0000000000000000 RCX: ffffc9000c301000 RDX: 0000000000040000 RSI: ffffffff88325bc0 RDI: 0000000000000003 RBP: ffff8881631d5990 R08: ffff8881b7e26600 R09: ffff8881d85ea2a0 R10: ffffed103b0bd454 R11: ffff8881d85ea2a7 R12: ffffffff88325bc0 R13: 0000000000000003 R14: 0000000000000005 R15: 0000000000000003 get_scan_count mm/vmscan.c:2462 [inline] shrink_node_memcg+0x3e5/0x18f0 mm/vmscan.c:2510 shrink_node+0x3bc/0x16b0 mm/vmscan.c:2755 shrink_zones mm/vmscan.c:2987 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3049 try_to_free_mem_cgroup_pages+0x4cf/0xcd0 mm/vmscan.c:3350 try_charge+0x521/0x1700 mm/memcontrol.c:2211 mem_cgroup_try_charge+0x627/0xe20 mm/memcontrol.c:5890 mem_cgroup_try_charge_delay+0x1d/0xa0 mm/memcontrol.c:5905 wp_page_copy+0x520/0x2500 mm/memory.c:2270 do_wp_page+0x520/0x2920 mm/memory.c:2549 handle_pte_fault mm/memory.c:3781 [inline] __handle_mm_fault+0x3bef/0x5be0 mm/memory.c:3889 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline] __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 <f3> a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff8881631d7888 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000500 RDX: 0000000000001000 RSI: ffff8881bcafcb00 RDI: 0000000020d9d000 RBP: ffff8881631d78c0 R08: 0000000000000000 R09: 0000000000000040 R10: ffffed103795f9ff R11: ffff8881bcafcfff R12: 0000000020d9d500 R13: 0000000020d9c500 R14: ffff8881bcafc000 R15: 00007ffffffff000 copy_page_to_iter_iovec lib/iov_iter.c:209 [inline] copy_page_to_iter+0x447/0x1000 lib/iov_iter.c:879 pipe_to_user+0xb4/0x170 fs/splice.c:1242 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x38b/0x7c0 fs/splice.c:627 vmsplice_to_user fs/splice.c:1266 [inline] do_vmsplice.part.15+0x338/0x3d0 fs/splice.c:1344 do_vmsplice fs/splice.c:1338 [inline] __do_sys_vmsplice+0x251/0x2f0 fs/splice.c:1365 __se_sys_vmsplice fs/splice.c:1347 [inline] __x64_sys_vmsplice+0x97/0xf0 fs/splice.c:1347 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7b88948c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000116 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7b889496d4 R13: 00000000004c5ae1 R14: 00000000004da350 R15: 00000000ffffffff rcu: rcu_preempt kthread starved for 10502 jiffies! g227905 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 22392 10 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_timeout+0x140/0x260 kernel/time/timer.c:1804 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1934 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2090 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 ip6_tunnel: xmit: Local address not yet configured!