rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=5514/1/0x4000000000000000 softirq=174970/174970 fqs=0
rcu: 	(detected by 0, t=10504 jiffies, g=248513, q=525 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 454 Comm: syz.1.8166 Not tainted 6.10.0-syzkaller-12710-g3a7e02c040b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:227 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4773 [inline]
RIP: 0010:__lock_acquire+0x5c6/0x2040 kernel/locking/lockdep.c:5092
Code: d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 79 12 00 00 0f b6 2b 41 0f b6 04 16 84 c0 0f 85 8d 12 00 00 41 8b 1f 81 e3 ff 1f 00 00 <48> 89 d8 48 c1 e8 06 48 8d 3c c5 00 78 4e 93 be 08 00 00 00 e8 b1
RSP: 0018:ffffc90000a18910 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff816fb684
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff934e7800
RBP: 0000000000000002 R08: ffffffff934e7807 R09: 1ffffffff269cf00
R10: dffffc0000000000 R11: fffffbfff269cf01 R12: ffff88806a7f8000
R13: 0000000000000001 R14: 1ffff1100d4ff16f R15: ffff88806a7f8b78
FS:  00007f97818706c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f170817c55f CR3: 000000005ad40000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x16d/0x510 lib/debugobjects.c:709
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1706 [inline]
 __hrtimer_run_queues+0x6cb/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+0x110/0x3f0 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:preempt_count_add+0x121/0x190 kernel/sched/core.c:5648
Code: 0e 00 75 19 90 48 c7 c7 e0 63 ea 8b 48 c7 c6 20 64 ea 8b e8 81 b0 f2 ff 90 0f 0b 90 90 90 e9 5c ff ff ff 48 c7 c1 80 f9 cd 94 <80> e1 07 80 c1 03 38 c1 0f 8c fe fe ff ff 48 c7 c7 80 f9 cd 94 e8
RSP: 0018:ffffc9000c51ea40 EFLAGS: 00000202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff94cdf980
RDX: ffff88806a7f8000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc9000c51eba0 R08: ffffffff814107f1 R09: 0000000000000000
R10: ffffc9000c51eba0 R11: fffff520018a3d80 R12: ffffc9000c51ec38
R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000000
 unwind_next_frame+0xc1/0x2a00 arch/x86/kernel/unwind_orc.c:479
 __unwind_start+0x641/0x7c0 arch/x86/kernel/unwind_orc.c:760
 unwind_start arch/x86/include/asm/unwind.h:64 [inline]
 arch_stack_walk+0x103/0x1b0 arch/x86/kernel/stacktrace.c:24
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3988 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4044
 skb_clone+0x20c/0x390 net/core/skbuff.c:2071
 __netlink_deliver_tap_skb net/netlink/af_netlink.c:300 [inline]
 __netlink_deliver_tap+0x3cc/0x7c0 net/netlink/af_netlink.c:325
 netlink_deliver_tap+0x19d/0x1b0 net/netlink/af_netlink.c:338
 __netlink_sendskb net/netlink/af_netlink.c:1275 [inline]
 netlink_sendskb+0x68/0x140 net/netlink/af_netlink.c:1284
 netlink_unicast+0x39d/0x990 net/netlink/af_netlink.c:1372
 nlmsg_unicast include/net/netlink.h:1158 [inline]
 nlmsg_notify+0x13b/0x1c0 net/netlink/af_netlink.c:2601
 notify_and_destroy net/sched/sch_api.c:1073 [inline]
 qdisc_graft+0x1221/0x1580 net/sched/sch_api.c:1173
 tc_modify_qdisc+0xf47/0x1e40 net/sched/sch_api.c:1788
 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 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: 0033:0x7f9780b77299
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:00007f9781870048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9780d05f80 RCX: 00007f9780b77299
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000005
RBP: 00007f9780be48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000004d R14: 00007f9780d05f80 R15: 00007ffe382da4a8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g248513 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=171690
rcu: rcu_preempt kthread starved for 10504 jiffies! g248513 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:25560 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 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>