rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=cb64/1/0x4000000000000000 softirq=29596/29596 fqs=0
rcu: 	(t=10500 jiffies g=40793 q=226 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g40793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=23342
rcu: rcu_preempt kthread starved for 10500 jiffies! g40793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:I stack:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5407 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6748
 __schedule_loop kernel/sched/core.c:6825 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6840
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8696 Comm: syz.0.1118 Not tainted 6.10.0-syzkaller-00017-g5e0497553643 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:srso_alias_safe_ret+0x0/0x7 arch/x86/lib/retpoline.S:171
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <48> 8d 64 24 08 c3 cc e8 f4 ff ff ff 0f 0b cc cc cc cc cc cc cc cc
RSP: 0018:ffffc90000007c30 EFLAGS: 00000002
RAX: ffffc90000007c80 RBX: ffffc90000007c90 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90000007c90
RBP: ffffc90000007d30 R08: ffffc90000007c8f R09: ffffc90000007c80
R10: dffffc0000000000 R11: fffff52000000f92 R12: ffffc90000007c80
R13: ffff8880663ed340 R14: dffffc0000000000 R15: 1ffff92000000f8c
FS:  00007fbea9c976c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020037000 CR3: 00000000699a2000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 srso_alias_return_thunk+0x5/0xfbef5 arch/x86/lib/retpoline.S:181
 debug_object_deactivate+0x9a/0x390 lib/debugobjects.c:753
 debug_hrtimer_deactivate kernel/time/hrtimer.c:428 [inline]
 debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:484
 __run_hrtimer kernel/time/hrtimer.c:1657 [inline]
 __hrtimer_run_queues+0x305/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__outw arch/x86/include/asm/shared/io.h:23 [inline]
RIP: 0010:iowrite16+0x37/0x90 lib/iomap.c:213
Code: 09 e0 fc 48 81 fb 00 00 04 00 72 0a e8 e2 09 e0 fc 66 89 2b eb 59 48 81 fb 01 00 01 00 72 0d e8 cf 09 e0 fc 89 e8 89 da 66 ef <eb> 43 8b 2d 21 14 ee 09 31 ff 89 ee e8 f8 0d e0 fc 85 ed 74 2b e8
RSP: 0018:ffffc90003677928 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 000000000001c090 RCX: 0000000000040000
RDX: 000000000001c090 RSI: 00000000000044b2 RDI: 00000000000044b3
RBP: 0000000000000000 R08: ffffffff8525aaf0 R09: ffff88801e80f198
R10: dffffc0000000000 R11: ffffffff85270230 R12: dffffc0000000000
R13: 0000000000008d17 R14: dffffc0000000000 R15: ffff88801eac4600
 vp_notify+0x57/0x80 drivers/virtio/virtio_pci_common.c:45
 virtqueue_notify drivers/virtio/virtio_ring.c:2370 [inline]
 virtqueue_kick+0x39d/0x5c0 drivers/virtio/virtio_ring.c:2393
 request_entropy drivers/char/hw_random/virtio-rng.c:63 [inline]
 copy_data+0x237/0x370 drivers/char/hw_random/virtio-rng.c:74
 virtio_read+0x151/0x200 drivers/char/hw_random/virtio-rng.c:114
 rng_get_data drivers/char/hw_random/core.c:186 [inline]
 rng_dev_read+0x24a/0x6d0 drivers/char/hw_random/core.c:224
 do_loop_readv_writev fs/read_write.c:761 [inline]
 vfs_readv+0x6c4/0xa90 fs/read_write.c:934
 do_preadv fs/read_write.c:1049 [inline]
 __do_sys_preadv fs/read_write.c:1099 [inline]
 __se_sys_preadv fs/read_write.c:1094 [inline]
 __x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1094
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbea8f75bd9
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:00007fbea9c97048 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007fbea9103f60 RCX: 00007fbea8f75bd9
RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007fbea8fe4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbea9103f60 R15: 00007ffeff5064f8
 </TASK>
CPU: 1 PID: 8699 Comm: syz.0.1118 Not tainted 6.10.0-syzkaller-00017-g5e0497553643 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0x1860/0x29d0 kernel/smp.c:855
Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 c9 0c 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 74 08 0c 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 58 08
RSP: 0000:ffffc9001648f3e0 EFLAGS: 00000246
RAX: ffffffff818a2148 RBX: 1ffff11017288c09 RCX: 0000000000040000
RDX: ffffc9000a868000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9001648f5c0 R08: ffffffff818a2117 R09: 1ffffffff25f5eb0
R10: dffffc0000000000 R11: fffffbfff25f5eb1 R12: dffffc0000000000
R13: ffff8880b9446048 R14: ffff8880b953f900 R15: 0000000000000000
FS:  00007fbea9c766c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe9ec00400 CR3: 00000000699a2000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:941 [inline]
 flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1027
 flush_tlb_page arch/x86/include/asm/tlbflush.h:254 [inline]
 ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101
 wp_page_copy mm/memory.c:3351 [inline]
 do_wp_page+0x1bf0/0x52f0 mm/memory.c:3677
 handle_pte_fault+0x117e/0x7090 mm/memory.c:5397
 __handle_mm_fault mm/memory.c:5524 [inline]
 handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5689
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fbea8e3b453
Code: 1f 84 00 00 00 00 00 3d 00 01 00 00 75 29 45 31 f6 48 83 c4 18 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 40 00 49 8b 0f <44> 88 34 01 49 83 47 10 01 eb 92 66 90 8d 90 ff fe ff ff 83 fa 1c
RSP: 002b:00007fbea9c754b0 EFLAGS: 00010202
RAX: 0000000000000400 RBX: 00007fbea9c75550 RCX: 00007fbe9ec00000
RDX: 00007fbea9c756f0 RSI: 0000000000000001 RDI: 00007fbea9c755f0
RBP: 00000000000000f9 R08: 0000000000000008 R09: 000000000000009e
R10: 00000000000000ba R11: 00007fbea9c75550 R12: 0000000000000001
R13: 00007fbea8ff5f80 R14: 0000000000000020 R15: 00007fbea9c755f0
 </TASK>