rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=7924/1/0x4000000000000000 softirq=49039/49066 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P21436/1:b..l
rcu: 	(detected by 1, t=13611 jiffies, g=83517, q=1895 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5162 Comm: kworker/0:7 Not tainted 6.7.0-rc4-syzkaller-00953-g00b1b2296b58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events_power_efficient gc_worker
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5730 [inline]
RIP: 0010:lock_acquire+0x108/0x520 kernel/locking/lockdep.c:5719
Code: e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 be 03 00 00 8b 0d 2f 12 b1 0d 85 c9 0f 84 e4 00 00 00 65 8b 05 30 6a 9a 7e <85> c0 0f 85 1a 01 00 00 65 48 8b 14 25 c0 bc 03 00 48 8d ba bc 0a
RSP: 0018:ffffc90000007c90 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 1ffff92000000f94 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b2f1360 RDI: ffffffff8ca6fa60
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1e31fba
R10: ffffffff8f18fdd7 R11: 0000000000000004 R12: 0000000000000001
R13: 0000000000000000 R14: ffff88809f5af300 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1dbb74cae0 CR3: 0000000029729000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __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:351 [inline]
 advance_sched+0xd8/0xc60 net/sched/sch_taprio.c:935
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x203/0xc20 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x105/0x400 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:lock_acquire+0x1ef/0x520 kernel/locking/lockdep.c:5722
Code: c1 05 6d 69 9a 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 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:ffffc90004c3fb00 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000987f62 RCX: 00000000c13dc250
RDX: 0000000000000001 RSI: ffffffff8accbc20 RDI: ffffffff8b2f13e0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff23e2dd0
R10: ffffffff91f16e87 R11: 0000000000000002 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8cfabce0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 rcu_read_lock include/linux/rcupdate.h:747 [inline]
 gc_worker+0x24d/0x17e0 net/netfilter/nf_conntrack_core.c:1488
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
task:syz-executor.4  state:R  running task     stack:26464 pid:21436 tgid:21414 ppid:5095   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:7008
 irqentry_exit+0x36/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0xe/0x520 kernel/locking/lockdep.c:5722
Code: 04 e8 86 54 76 00 8b 74 24 04 e9 23 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df <41> 57 4d 89 cf 41 56 49 89 fe 41 55 41 89 d5 41 54 45 89 c4 55 53
RSP: 0018:ffffc90003a4f8e0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffea00055ffc00 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cfabce0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffea00055ffc37 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000a134d744ee
 rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 rcu_read_lock include/linux/rcupdate.h:747 [inline]
 page_ext_get+0x3a/0x310 mm/page_ext.c:508
 __reset_page_owner+0x2f/0x190 mm/page_owner.c:145
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1144 [inline]
 free_unref_page_prepare+0x53c/0xb80 mm/page_alloc.c:2354
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2494
 vfree+0x181/0x7a0 mm/vmalloc.c:2842
 kvfree+0x33/0x50 mm/util.c:661
 __htab_map_lookup_and_delete_batch+0x13aa/0x1f00 kernel/bpf/hashtab.c:1898
 bpf_map_do_batch+0x2bd/0x6c0 kernel/bpf/syscall.c:4915
 __sys_bpf+0x1700/0x4920 kernel/bpf/syscall.c:5441
 __do_sys_bpf kernel/bpf/syscall.c:5488 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5486 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5486
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f73e0c7cba9
RSP: 002b:00007f73e19500c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f73e0d9c2c0 RCX: 00007f73e0c7cba9
RDX: 0000000000000038 RSI: 0000000020000080 RDI: 0000000000000018
RBP: 00007f73e0cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f73e0d9c2c0 R15: 00007ffff8c6e878
 </TASK>
rcu: rcu_preempt kthread starved for 13611 jiffies! g83517 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27424 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_timeout+0x137/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1ec/0xb10 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x24b/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 55 Comm: kworker/1:2 Not tainted 6.7.0-rc4-syzkaller-00953-g00b1b2296b58 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: events xdp_umem_release_deferred
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xd/0x60 kernel/kcov.c:207
Code: fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 48 8b 14 25 c0 bc 03 00 <65> 8b 05 f4 26 7c 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74
RSP: 0018:ffffc9000130f840 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffffc9000130f8c8 RCX: 0000000000000001
RDX: ffff888017690000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000009
R10: 0000000000000005 R11: 0000000000000002 R12: ffffffff8faddd0a
R13: ffffc9000130fc28 R14: ffffffff8faddd0e R15: ffffc9000130fc10
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556ce8d9a198 CR3: 000000000cd77000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 unwind_next_frame+0x765/0x2390 arch/x86/kernel/unwind_orc.c:581
 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122
 save_stack+0x160/0x1f0 mm/page_owner.c:128
 __reset_page_owner+0x5a/0x190 mm/page_owner.c:149
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1144 [inline]
 free_unref_page_prepare+0x53c/0xb80 mm/page_alloc.c:2354
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2494
 __folio_put_small mm/swap.c:106 [inline]
 __folio_put+0xc3/0x110 mm/swap.c:129
 folio_put_refs include/linux/mm.h:1503 [inline]
 gup_put_folio+0x21c/0x2b0 mm/gup.c:202
 unpin_user_pages_dirty_lock+0x225/0x4e0 mm/gup.c:398
 xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
 xdp_umem_release net/xdp/xdp_umem.c:61 [inline]
 xdp_umem_release_deferred+0x126/0x2c0 net/xdp/xdp_umem.c:71
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>