rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=d624/1/0x4000000000000000 softirq=48413/48413 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=68161, q=479 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14203 Comm: syz-executor.3 Not tainted 6.4.0-syzkaller-01224-g1ef6663a587b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
RIP: 0010:_raw_spin_lock_irqsave+0xd0/0x120 kernel/locking/spinlock.c:162
Code: 02 00 00 74 05 e8 00 50 d7 f6 bf 01 00 00 00 e8 96 e9 a3 f6 49 8d 7e 18 31 f6 31 d2 31 c9 41 b8 01 00 00 00 45 31 c9 ff 75 08 <e8> 3b 00 b0 f6 48 83 c4 08 4c 89 f7 e8 8f 61 b1 f6 48 c7 04 24 0e
RSP: 0018:ffffc90000007b58 EFLAGS: 00000046
RAX: 0000000000010002 RBX: 1ffff92000000f70 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff91d8ccf0
RBP: ffffc90000007bf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000046
R13: 1ffff92000000f6c R14: ffffffff91d8ccd8 R15: dffffc0000000000
FS:  00007f770ce33700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0193b6fd9 CR3: 00000000259eb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 debug_object_activate+0x163/0x530 lib/debugobjects.c:717
 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x30/0x310 kernel/time/hrtimer.c:1087
 __run_hrtimer kernel/time/hrtimer.c:1705 [inline]
 __hrtimer_run_queues+0x6c0/0xd10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
 __sysvec_apic_timer_interrupt+0x13f/0x480 arch/x86/kernel/apic/apic.c:1115
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:stack_trace_consume_entry+0x4/0x280 kernel/stacktrace.c:83
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 7b ff ff ff 48 89 df e8 ac 01 6a 00 e9 6e ff ff ff e8 e2 7d 37 09 66 90 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48 ba 00 00 00
RSP: 0018:ffffc9000427ed58 EFLAGS: 00000282
RAX: ffffffff815ce379 RBX: ffffc9000427ed60 RCX: ffffffff8f987000
RDX: ffffffff8faeb601 RSI: ffffffff815ce379 RDI: ffffc9000427ee40
RBP: ffffc9000427edf0 R08: ffffc9000427fa28 R09: 0000000000000000
R10: ffffc9000427edb0 R11: dffffc0000000001 R12: ffff888082aa5940
R13: ffffffff8179a120 R14: ffffc9000427ee40 R15: 0000000000000000
 arch_stack_walk+0x105/0x140 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:711
 slab_alloc_node mm/slub.c:3451 [inline]
 kmem_cache_alloc_node+0x157/0x350 mm/slub.c:3496
 kmalloc_reserve+0x8a/0x240 net/core/skbuff.c:568
 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:654
 alloc_skb include/linux/skbuff.h:1288 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 inet6_netconf_notify_devconf+0xfc/0x1c0 net/ipv6/addrconf.c:581
 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7122 [inline]
 addrconf_sysctl_unregister net/ipv6/addrconf.c:7146 [inline]
 addrconf_ifdown+0x1852/0x1b90 net/ipv6/addrconf.c:3908
 addrconf_notify+0x1b1/0xfe0
 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93
 call_netdevice_notifiers_info net/core/dev.c:1935 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline]
 call_netdevice_notifiers net/core/dev.c:1987 [inline]
 unregister_netdevice_many_notify+0xddb/0x1890 net/core/dev.c:10884
 vti6_exit_batch_net+0x3c7/0x410 net/ipv6/ip6_vti.c:1188
 ops_exit_list net/core/net_namespace.c:175 [inline]
 setup_net+0x93d/0xb90 net/core/net_namespace.c:362
 copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:491
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 copy_namespaces+0x399/0x410 kernel/nsproxy.c:179
 copy_process+0x1af8/0x4290 kernel/fork.c:2510
 kernel_clone+0x222/0x800 kernel/fork.c:2915
 __do_sys_clone kernel/fork.c:3058 [inline]
 __se_sys_clone kernel/fork.c:3042 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:3042
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f770c08c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f770ce33118 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f770c1ac120 RCX: 00007f770c08c389
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000042048480
RBP: 00007f770c0d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffdb68686ff R14: 00007f770ce33300 R15: 0000000000022000
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g68161 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=48317
rcu: rcu_preempt kthread starved for 10502 jiffies! g68161 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:25560 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x2c6/0x1010 kernel/rcu/tree.c:1609
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1808
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </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: 14203 Comm: syz-executor.3 Not tainted 6.4.0-syzkaller-01224-g1ef6663a587b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:check_preemption_disabled+0x2/0x110 lib/smp_processor_id.c:13
Code: ff ff ff 0f 1f 44 00 00 f3 0f 1e fa 48 c7 c7 80 6f 38 8b 48 c7 c6 c0 6f 38 8b eb 0c 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 <41> 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24
RSP: 0018:ffffc90000007af0 EFLAGS: 00000083
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816b1474
RDX: 0000000000000000 RSI: ffffffff8b386fc0 RDI: ffffffff8b386f80
RBP: ffffc90000007c68 R08: dffffc0000000000 R09: fffffbfff1cacad6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000f6c
R13: dffffc0000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f770ce33700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0193b6fd9 CR3: 00000000259eb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:695
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0xe3/0x520 kernel/locking/lockdep.c:5676
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 advance_sched+0xae/0xc80 net/sched/sch_taprio.c:932
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x59f/0xd10 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
 __sysvec_apic_timer_interrupt+0x13f/0x480 arch/x86/kernel/apic/apic.c:1115
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:stack_trace_consume_entry+0x4/0x280 kernel/stacktrace.c:83
Code: ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 7b ff ff ff 48 89 df e8 ac 01 6a 00 e9 6e ff ff ff e8 e2 7d 37 09 66 90 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 48 83 ec 18 48 89 fb 48 ba 00 00 00
RSP: 0018:ffffc9000427ed58 EFLAGS: 00000282
RAX: ffffffff815ce379 RBX: ffffc9000427ed60 RCX: ffffffff8f987000
RDX: ffffffff8faeb601 RSI: ffffffff815ce379 RDI: ffffc9000427ee40
RBP: ffffc9000427edf0 R08: ffffc9000427fa28 R09: 0000000000000000
R10: ffffc9000427edb0 R11: dffffc0000000001 R12: ffff888082aa5940
R13: ffffffff8179a120 R14: ffffc9000427ee40 R15: 0000000000000000
 arch_stack_walk+0x105/0x140 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:711
 slab_alloc_node mm/slub.c:3451 [inline]
 kmem_cache_alloc_node+0x157/0x350 mm/slub.c:3496
 kmalloc_reserve+0x8a/0x240 net/core/skbuff.c:568
 __alloc_skb+0x1b1/0x420 net/core/skbuff.c:654
 alloc_skb include/linux/skbuff.h:1288 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 inet6_netconf_notify_devconf+0xfc/0x1c0 net/ipv6/addrconf.c:581
 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7122 [inline]
 addrconf_sysctl_unregister net/ipv6/addrconf.c:7146 [inline]
 addrconf_ifdown+0x1852/0x1b90 net/ipv6/addrconf.c:3908
 addrconf_notify+0x1b1/0xfe0
 notifier_call_chain+0x18c/0x3a0 kernel/notifier.c:93
 call_netdevice_notifiers_info net/core/dev.c:1935 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:1973 [inline]
 call_netdevice_notifiers net/core/dev.c:1987 [inline]
 unregister_netdevice_many_notify+0xddb/0x1890 net/core/dev.c:10884
 vti6_exit_batch_net+0x3c7/0x410 net/ipv6/ip6_vti.c:1188
 ops_exit_list net/core/net_namespace.c:175 [inline]
 setup_net+0x93d/0xb90 net/core/net_namespace.c:362
 copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:491
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 copy_namespaces+0x399/0x410 kernel/nsproxy.c:179
 copy_process+0x1af8/0x4290 kernel/fork.c:2510
 kernel_clone+0x222/0x800 kernel/fork.c:2915
 __do_sys_clone kernel/fork.c:3058 [inline]
 __se_sys_clone kernel/fork.c:3042 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:3042
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f770c08c389
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f770ce33118 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f770c1ac120 RCX: 00007f770c08c389
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000042048480
RBP: 00007f770c0d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffdb68686ff R14: 00007f770ce33300 R15: 0000000000022000
 </TASK>