rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10501 ticks this GP) idle=ae14/1/0x4000000000000000 softirq=50798/50798 fqs=2
rcu: 	(t=10501 jiffies g=38329 q=290 ncpus=2)
rcu: rcu_preempt kthread starved for 10497 jiffies! g38329 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27080 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x16f5/0x4d00 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6879
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 15147 Comm: syz.0.4097 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:102 [inline]
RIP: 0010:native_queued_spin_lock_slowpath+0xaf/0x8e0 kernel/locking/qspinlock.c:141
Code: 00 00 00 c7 44 24 60 00 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 <48> 89 df be 04 00 00 00 e8 c4 1d b2 f6 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc90002cef800 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801d6d2588 RCX: ffffffff8b71260c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88801d6d2588
RBP: ffffc90002cef8f8 R08: ffff88801d6d258b R09: 1ffff11003ada4b1
R10: dffffc0000000000 R11: ffffed1003ada4b2 R12: 1ffff9200059df08
R13: 0000000000000001 R14: ffffc90002cef860 R15: 1ffff11003ada4b1
FS:  000055555e4aa500(0000) GS:ffff8881a3c1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028f26000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
 queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 futex_unqueue+0xf6/0x240 kernel/futex/core.c:937
 __futex_wait+0x223/0x3e0 kernel/futex/waitwake.c:690
 futex_wait+0x104/0x360 kernel/futex/waitwake.c:715
 do_futex+0x333/0x420 kernel/futex/syscalls.c:102
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f300778e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd93c30d38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000032bca RCX: 00007f300778e9a9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f30079b5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 0000000893c3102f
R10: 00007ffd93c30e30 R11: 0000000000000246 R12: 00007f30079b5fac
R13: 00007ffd93c30e30 R14: 0000000000032bfc R15: 00007ffd93c30e50
 </TASK>
CPU: 0 UID: 0 PID: 15149 Comm: syz.0.4097 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:process_backlog+0x6a8/0x14f0 net/core/dev.c:6444
Code: 00 00 48 c7 c2 40 fd 92 8c e8 04 ea 44 f8 48 c7 c7 a0 f0 13 8e 48 89 de e8 e5 cf 44 f8 e8 00 66 4e f8 44 8b 7c 24 14 44 89 ff <44> 8b 74 24 5c 44 89 f6 e8 3b ae 66 f8 45 39 f7 0f 8d c2 0c 00 00
RSP: 0018:ffffc90000007a60 EFLAGS: 00000287
RAX: 0000000000000000 RBX: ffffffff89596d65 RCX: 8c6df2cb22abaf00
RDX: 0000000000000002 RSI: ffffffff8d99873a RDI: 0000000000000001
RBP: ffffc90000007b88 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000001
FS:  00007f300864b6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028f26000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __napi_poll+0xc7/0x480 net/core/dev.c:7414
 napi_poll net/core/dev.c:7478 [inline]
 net_rx_action+0x707/0xe30 net/core/dev.c:7605
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__list_del include/linux/list.h:195 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:218 [inline]
RIP: 0010:list_del_init include/linux/list.h:287 [inline]
RIP: 0010:plist_del+0x333/0x3f0 lib/plist.c:140
Code: 80 3c 28 00 74 08 4c 89 ff e8 c9 c7 b9 f6 49 8b 2f 4c 8d 6d 08 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ef e8 93 c8 b9 f6 4d 89 65 00 4c 89 e0 48 c1 e8 03 49
RSP: 0018:ffffc9000310fb10 EFLAGS: 00000246
RAX: 1ffff11003ada4ba RBX: ffff88801d6d25c8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff88801d6d25c8 RDI: ffffc90002cefac0
RBP: ffff88801d6d25c8 R08: ffff8880202039ab R09: 1ffff11004040735
R10: dffffc0000000000 R11: ffffed1004040736 R12: ffff88801d6d25c8
R13: ffff88801d6d25d0 R14: ffffc90002cefaa0 R15: ffffc90002cefab8
 __futex_unqueue+0xf0/0x160 kernel/futex/core.c:860
 __futex_wake_mark kernel/futex/waitwake.c:115 [inline]
 futex_wake_mark+0xe2/0x220 kernel/futex/waitwake.c:140
 futex_wake+0x37a/0x500 kernel/futex/waitwake.c:191
 do_futex+0x395/0x420 kernel/futex/syscalls.c:107
 __do_sys_futex kernel/futex/syscalls.c:179 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f300778e9a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f300864b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f30079b5fa8 RCX: 00007f300778e9a9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f30079b5fac
RBP: 00007f30079b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f30079b5fac
R13: 0000000000000000 R14: 00007ffd93c30af0 R15: 00007ffd93c30bd8
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 105795408831 wd_nsec: 105795411225
