rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P13709/1:b..l P5097/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=70493, q=59 ncpus=2)
task:syz-executor.4  state:R  running task     stack:24048 pid:5097  tgid:5097  ppid:5075   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7049
 irqentry_exit+0x36/0x90 kernel/entry/common.c:348
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:654
RIP: 0010:lock_acquire+0x1f2/0x540 kernel/locking/lockdep.c:5722
Code: c1 05 2a e6 96 7e 83 f8 01 0f 85 c8 02 00 00 9c 58 f6 c4 02 0f 85 b3 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900035f7c70 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920006bef90 RCX: 00000000d439196c
RDX: 0000000000000001 RSI: ffffffff8aecc120 RDI: ffffffff8b4ec1c0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff275c5f8
R10: ffffffff93ae2fc7 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d5b08e0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 rcu_read_lock include/linux/rcupdate.h:750 [inline]
 task_cls_classid include/net/cls_cgroup.h:32 [inline]
 sock_update_classid include/net/cls_cgroup.h:44 [inline]
 sk_alloc+0x304/0xb80 net/core/sock.c:2156
 inet_create net/ipv4/af_inet.c:325 [inline]
 inet_create+0x3a1/0x1070 net/ipv4/af_inet.c:251
 __sock_create+0x32e/0x800 net/socket.c:1571
 sock_create net/socket.c:1622 [inline]
 __sys_socket_create net/socket.c:1659 [inline]
 __sys_socket+0x14f/0x260 net/socket.c:1706
 __do_sys_socket net/socket.c:1720 [inline]
 __se_sys_socket net/socket.c:1718 [inline]
 __x64_sys_socket+0x72/0xb0 net/socket.c:1718
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f37c4e7eb27
RSP: 002b:00007ffccced7508 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f37c4e7eb27
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffccced7c5c R08: 00007ffccced755c R09: 00007ffccced7947
R10: 00007ffccced75b0 R11: 0000000000000202 R12: 00007f37c4f7bd00
R13: 000000000015e741 R14: 000000000015d8d4 R15: 00007f37c4f7dec0
 </TASK>
task:syz-executor.0  state:R  running task     stack:24032 pid:13709 tgid:13709 ppid:13669  flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6906
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 copy_pte_range mm/memory.c:1226 [inline]
 copy_pmd_range mm/memory.c:1287 [inline]
 copy_pud_range mm/memory.c:1324 [inline]
 copy_p4d_range mm/memory.c:1348 [inline]
 copy_page_range+0x12d5/0x46a0 mm/memory.c:1446
 dup_mmap kernel/fork.c:745 [inline]
 dup_mm kernel/fork.c:1685 [inline]
 copy_mm kernel/fork.c:1734 [inline]
 copy_process+0x5dd6/0x96e0 kernel/fork.c:2498
 kernel_clone+0xfd/0x940 kernel/fork.c:2903
 __do_sys_clone+0xba/0x100 kernel/fork.c:3046
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f4388879dd3
RSP: 002b:00007fffe9444788 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4388879dd3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555560ae750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
rcu: rcu_preempt kthread starved for 10559 jiffies! g70493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27824 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6804 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6819
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2183
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15766 Comm: syz-executor.1 Not tainted 6.8.0-rc1-next-20240125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:61 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x39/0x1a0 mm/kasan/generic.c:189
Code: f8 41 54 44 0f b6 c2 48 01 f0 55 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 b3 00 00 00 4c 8d 54 37 ff <48> 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 48 c1 ed 03 49 c1
RSP: 0018:ffffc90000007e28 EFLAGS: 00000087
RAX: ffff7fffffffffff RBX: 0000000000000000 RCX: ffffffff816b94c9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f7a2190
RBP: 1ffff92000000fcb R08: 0000000000000000 R09: 00000166eb72d9d7
R10: ffffffff8f7a2197 R11: 0000000000000000 R12: ffff8880b942b918
R13: 0000000000000000 R14: 000000000003c0cc R15: 00000166eb72d9d7
FS:  00007ff8694a36c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8694a2f00 CR3: 0000000045910000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:516 [inline]
 cpu_online include/linux/cpumask.h:1116 [inline]
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xa9/0x6a0 kernel/locking/lockdep.c:5765
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x1a/0x80 kernel/locking/spinlock.c:194
 hrtimer_interrupt+0x363/0x800 kernel/time/hrtimer.c:1825
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x410 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 6a dd ad f6 48 89 df e8 d2 58 ae f6 e8 dd 98 d5 f6 fb bf 01 00 00 00 <e8> b2 9f 9f f6 65 8b 05 f3 09 46 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc90013f87cf8 EFLAGS: 00000202
RAX: 0000000003034f49 RBX: ffff8880560240c0 RCX: 1ffffffff1ef3de1
RDX: 0000000000000000 RSI: ffffffff8aecbe20 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f7a2197 R11: 0000000000000000 R12: ffff888056024558
R13: 0000000000000021 R14: ffff8880560244c0 R15: 1ffff920027f0fae
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x187d/0x2760 kernel/signal.c:2896
 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x153/0x2b0 kernel/entry/common.c:212
 do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7ff86867cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff8694a30c8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007ff8687abf80 RCX: 00007ff86867cda9
RDX: 000000002006b000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ff8686c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff8687abf80 R15: 00007fff42991b08
 </TASK>