rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=8d8c/1/0x4000000000000000 softirq=33911/33912 fqs=6
rcu: 	(detected by 0, t=10505 jiffies, g=30445, q=1206 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 9050 Comm: syz.4.684 Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x19/0x120 lib/smp_processor_id.c:14
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 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 08 <65> 8b 1d 0c d4 44 74 65 8b 05 01 d4 44 74 a9 ff ff ff 7f 74 26 65
RSP: 0018:ffffc90000a18ac8 EFLAGS: 00000082
RAX: 5b455610f8a82c00 RBX: 0000000000000001 RCX: ffffffff81713dc0
RDX: 0000000000000000 RSI: ffffffff8c5fa9c0 RDI: ffffffff8c5fa980
RBP: ffffc90000a18c60 R08: ffffffff901c2377 R09: 1ffffffff203846e
R10: dffffc0000000000 R11: fffffbfff203846f R12: 1ffff92000143170
R13: ffffffff89c1d4c2 R14: ffff888022f8fc00 R15: dffffc0000000000
FS:  00007f658310a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557a245808 CR3: 00000000647f4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:737
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0xbf/0xa30 kernel/locking/lockdep.c:5860
 rcu_lock_release include/linux/rcupdate.h:347 [inline]
 rcu_read_unlock include/linux/rcupdate.h:880 [inline]
 advance_sched+0xb32/0xca0 net/sched/sch_taprio.c:987
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_is_held_type+0xb/0x190 kernel/locking/lockdep.c:5906
Code: fc ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 <41> 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 bb
RSP: 0018:ffffc9000356f7b8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff888027c21e00 RCX: ffff888027c21e00
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8e93c580
RBP: ffffc9000356f8f8 R08: ffffffff81e3df81 R09: 0000000000000000
R10: ffffc9000356f9c0 R11: fffff520006adf3f R12: 0000000000000000
R13: dffffc0000000000 R14: 00000000000000a2 R15: 1ffff920006adf04
 lock_is_held include/linux/lockdep.h:249 [inline]
 __might_resched+0xa5/0x780 kernel/sched/core.c:8720
 __might_fault+0x72/0x120 mm/memory.c:6748
 _inline_copy_from_user include/linux/uaccess.h:162 [inline]
 _copy_from_user+0x2a/0xc0 lib/usercopy.c:18
 copy_from_user include/linux/uaccess.h:212 [inline]
 copy_msghdr_from_user+0xae/0x680 net/socket.c:2513
 recvmsg_copy_msghdr net/socket.c:2769 [inline]
 ___sys_recvmsg net/socket.c:2841 [inline]
 do_recvmmsg+0x3bd/0xab0 net/socket.c:2940
 __sys_recvmmsg net/socket.c:3014 [inline]
 __do_sys_recvmmsg net/socket.c:3037 [inline]
 __se_sys_recvmmsg net/socket.c:3030 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3030
 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: 0033:0x7f658237e819
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:00007f658310a038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f6582536080 RCX: 00007f658237e819
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00007f65823f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6582536080 R15: 00007ffff8faec48
 </TASK>
rcu: rcu_preempt kthread starved for 10475 jiffies! g30445 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:26072 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 8731 Comm: syz-executor Not tainted 6.12.0-syzkaller-09073-g9f16d5e6f220 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_single+0x464/0x1990 kernel/smp.c:679
Code: 83 e4 01 75 16 e8 4c 22 0c 00 4d 89 fc 44 8b 7c 24 24 eb 46 e8 3d 22 0c 00 eb 3f 4d 89 fc 44 8b 7c 24 24 f3 90 42 0f b6 04 2b <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 1a 22 0c 00 eb e5 44 89
RSP: 0018:ffffc90003d47860 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff920007a8f29 RCX: ffff888030380000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003d479f8 R08: ffffffff8189bd69 R09: 1ffff920007a8ed8
R10: dffffc0000000000 R11: fffff520007a8ed9 R12: 1ffff920007a8f24
R13: dffffc0000000000 R14: ffffc90003d47948 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8d15a1dfe4 CR3: 000000001227e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 rcu_barrier+0x327/0x530 kernel/rcu/tree.c:4617
 netdev_wait_allrefs_any net/core/dev.c:10808 [inline]
 netdev_run_todo+0x99f/0x1000 net/core/dev.c:10899
 tun_detach drivers/net/tun.c:704 [inline]
 tun_chr_close+0x137/0x1b0 drivers/net/tun.c:3517
 __fput+0x23c/0xa50 fs/file_table.c:450
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa2f/0x28e0 kernel/exit.c:938
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f186997e819
Code: Unable to access opcode bytes at 0x7f186997e7ef.
RSP: 002b:00007ffe5d081048 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f186997e819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f18699de5b0 R08: 00007ffe5d07ede7 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000003 R14: 00000000ffffffff R15: 00007ffe5d0811f0
 </TASK>