rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=f55c/1/0x4000000000000000 softirq=298823/298824 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P20551/1:b..l
	(detected by 1, t=10502 jiffies, g=471497, q=352 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 151 Comm: kworker/0:2 Not tainted 6.1.78-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:__lock_acquire+0x11d8/0x1f80 kernel/locking/lockdep.c:5046
Code: 08 8b 18 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 20 12 49 90 be 08 00 00 00 e8 80 88 77 00 48 0f a3 1d 28 ae de 0e <73> 1b 48 8d 04 5b 48 c1 e0 06 48 8d 98 20 71 18 90 48 ba 00 00 00
RSP: 0018:ffffc90000007a80 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000062 RCX: ffffffff816a63f0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90491228
RBP: b4f6a874e194f063 R08: dffffc0000000000 R09: fffffbfff2092246
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888016726418
R13: ffff888016725940 R14: 0000000000000001 R15: 1ffff11002ce4c97
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9369a88d58 CR3: 00000000872f9000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1690 [inline]
 __hrtimer_run_queues+0x6d3/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x32/0x60 kernel/kcov.c:207
Code: 94 f1 77 7e 65 8b 15 95 f1 77 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc9000264faf8 EFLAGS: 00000246
RAX: ffffffff88c4c35a RBX: ffff88801326a3a8 RCX: ffff888016725940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000264fc50 R08: ffffffff88c4ba3e R09: fffffbfff2092256
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000004000 R14: ffff888013200000 R15: 000000000001a8eb
 gc_worker+0xcea/0x1530 net/netfilter/nf_conntrack_core.c:1509
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
task:syz-executor.3  state:R  running task     stack:24512 pid:20551 ppid:29338  flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:433
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666
Code: 2b 00 74 08 4c 89 f7 e8 4f 9d 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90004baf100 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000975e2c RCX: 1ffff92000975dcc
RDX: dffffc0000000000 RSI: ffffffff8aebfe40 RDI: ffffffff8b3d0e80
RBP: ffffc90004baf248 R08: dffffc0000000000 R09: fffffbfff2092245
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000975e28
R13: dffffc0000000000 R14: ffffc90004baf160 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:318 [inline]
 rcu_read_lock include/linux/rcupdate.h:759 [inline]
 count_memcg_event_mm+0xad/0x410 include/linux/memcontrol.h:1095
 handle_mm_fault+0x15b/0x5340 mm/memory.c:5234
 do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
 handle_page_fault arch/x86/mm/fault.c:1471 [inline]
 exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 <f3> a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90004baf710 EFLAGS: 00050206
RAX: ffffffff8435b001 RBX: 00007fffffffe000 RCX: 00000000000008c0
RDX: 0000000000001000 RSI: 000000002045e000 RDI: ffff888071169740
RBP: ffffc90004baf888 R08: dffffc0000000000 R09: ffffed100e22d400
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000001000
R13: 0000000000000000 R14: ffff888071169000 R15: 000000002045d8c0
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
 copyin+0xd8/0x120 lib/iov_iter.c:183
 _copy_from_iter+0x493/0xff0 lib/iov_iter.c:631
 copy_page_from_iter+0x76/0x100 lib/iov_iter.c:752
 skb_copy_datagram_from_iter+0x2d4/0x6b0 net/core/datagram.c:573
 unix_stream_sendmsg+0x78f/0x1070 net/unix/af_unix.c:2225
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa1c847dda9
RSP: 002b:00007fa1c92c70c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa1c85abf80 RCX: 00007fa1c847dda9
RDX: 0000000000000003 RSI: 0000000020000980 RDI: 0000000000000003
RBP: 00007fa1c84ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa1c85abf80 R15: 00007ffdab3768b8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g471497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=241042
rcu: rcu_preempt kthread starved for 10502 jiffies! g471497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25816 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 20553 Comm: syz-executor.4 Not tainted 6.1.78-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb0/0x3460 kernel/smp.c:998
Code: 2f 44 89 ee 83 e6 01 31 ff e8 ec 42 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 77 3f 0b 00 e9 1b ff ff ff f3 90 <42> 0f b6 04 2b 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff
RSP: 0018:ffffc90004bcf100 EFLAGS: 00000293
RAX: ffffffff817f3e4b RBX: 1ffff1101730841d RCX: ffff888029099dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004bcf4e0 R08: ffffffff817f3e14 R09: ffffed10173275db
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b98420e8
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd7eb938f8 CR3: 00000000193c4000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:924 [inline]
 flush_tlb_mm_range+0x353/0x590 arch/x86/mm/tlb.c:1010
 tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
 tlb_flush_mmu_tlbonly+0x1ab/0x410 include/asm-generic/tlb.h:430
 tlb_flush_mmu+0x28/0x210 mm/mmu_gather.c:260
 tlb_finish_mmu+0xce/0x1f0 mm/mmu_gather.c:361
 exit_mmap+0x3c3/0x9f0 mm/mmap.c:3239
 __mmput+0x115/0x3c0 kernel/fork.c:1199
 exit_mm+0x226/0x300 kernel/exit.c:563
 do_exit+0x9f6/0x26a0 kernel/exit.c:856
 do_group_exit+0x202/0x2b0 kernel/exit.c:1019
 get_signal+0x16f7/0x17d0 kernel/signal.c:2862
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa694a7f4aa
Code: Unable to access opcode bytes at 0x7fa694a7f480.
RSP: 002b:00007fa69584eef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: fffffffffffffff4 RBX: 00007fa69584ef80 RCX: 00007fa694a7f4aa
RDX: 0000000020000040 RSI: 0000000020000500 RDI: 00007fa69584ef40
RBP: 0000000020000040 R08: 00007fa69584ef80 R09: 0000000000000040
R10: 0000000000000040 R11: 0000000000000202 R12: 0000000020000500
R13: 00007fa69584ef40 R14: 00000000000004fc R15: 0000000020000080
 </TASK>