rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=faa4/1/0x4000000000000000 softirq=35640/35649 fqs=3197
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1523079          7            0
rcu: 	cputime:    14346      38131           34   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=44541 q=962 ncpus=2)
CPU: 1 PID: 10906 Comm: syz.0.1439 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5758
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001ef680 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 02692880f9632200
RDX: 0000000000000000 RSI: ffffffff8acadd60 RDI: ffffffff8b1c9c20
RBP: ffffc900001ef790 R08: dffffc0000000000 R09: 1ffffffff2239aa0
R10: dffffc0000000000 R11: fffffbfff2239aa1 R12: 1ffff9200003dedc
R13: ffffffff8d132160 R14: 0000000000000246 R15: dffffc0000000000
FS:  00007f77bf8246c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000007c351000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 rcu_read_lock include/linux/rcupdate.h:786 [inline]
 is_bpf_text_address+0x47/0x2a0 kernel/bpf/core.c:741
 kernel_text_address+0xa0/0xd0 kernel/extable.c:125
 __kernel_text_address+0xd/0x30 kernel/extable.c:79
 unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
 arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1811 [inline]
 slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 kmem_cache_free+0xf8/0x270 mm/slub.c:3852
 dev_kfree_skb_any_reason+0x120/0x130 net/core/dev.c:3241
 free_old_xmit_skbs+0x11a/0x3d0 drivers/net/virtio_net.c:780
 start_xmit+0x168/0x14a0 drivers/net/virtio_net.c:2420
 __netdev_start_xmit include/linux/netdevice.h:4943 [inline]
 netdev_start_xmit include/linux/netdevice.h:4957 [inline]
 xmit_one net/core/dev.c:3644 [inline]
 dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3660
 sch_direct_xmit+0x25e/0x4c0 net/sched/sch_generic.c:345
 __dev_xmit_skb net/core/dev.c:3881 [inline]
 __dev_queue_xmit+0x165d/0x3660 net/core/dev.c:4416
 NF_HOOK+0x331/0x3b0 include/linux/netfilter.h:-1
 arp_xmit+0x16c/0x270 net/ipv4/arp.c:664
 arp_process+0x13ba/0x17b0 net/ipv4/arp.c:854
 NF_HOOK+0x331/0x3b0 include/linux/netfilter.h:-1
 __netif_receive_skb_list_ptype net/core/dev.c:5694 [inline]
 __netif_receive_skb_list_core+0x429/0x750 net/core/dev.c:5727
 __netif_receive_skb_list net/core/dev.c:5789 [inline]
 netif_receive_skb_list_internal+0x943/0xca0 net/core/dev.c:5880
 gro_normal_list include/net/gro.h:451 [inline]
 gro_normal_one include/net/gro.h:464 [inline]
 napi_skb_finish net/core/gro.c:580 [inline]
 napi_gro_receive+0x565/0xb00 net/core/gro.c:610
 receive_buf+0x2203/0x3820 drivers/net/virtio_net.c:1870
 virtnet_receive drivers/net/virtio_net.c:2155 [inline]
 virtnet_poll+0x5dd/0x1280 drivers/net/virtio_net.c:2229
 __napi_poll+0xc0/0x460 net/core/dev.c:6650
 napi_poll net/core/dev.c:6717 [inline]
 net_rx_action+0x616/0xc40 net/core/dev.c:6853
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1392
Code: 5d 41 5e 41 5f 5d c3 e8 2b 76 29 09 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 53 66 90 e8 14 20 33 09 e8 4f ba 2e 00 fb 5b <41> 5e 41 5f c3 49 be 00 00 00 00 00 fc ff df 49 89 ff 48 8d 9f 58
RSP: 0018:ffffc90004fd7468 EFLAGS: 00000286
RAX: 02692880f9632200 RBX: ffff8880b8f3cdc8 RCX: 02692880f9632200
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9c20
RBP: ffffc90004fd7690 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: dffffc0000000000
R13: ffff8880193b8000 R14: ffff8880b8f3c080 R15: ffff8880193b8000
 __schedule+0x179f/0x45a0 kernel/sched/core.c:6704
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x111/0x120 kernel/locking/spinlock.c:194
 rcu_report_exp_rnp kernel/rcu/tree_exp.h:225 [inline]
 rcu_preempt_deferred_qs_irqrestore+0x8bb/0xce0 kernel/rcu/tree_plugin.h:570
 rcu_read_unlock_special+0x3d4/0x4d0 kernel/rcu/tree_plugin.h:762
 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:818 [inline]
 sched_mm_cid_remote_clear_old kernel/sched/core.c:11940 [inline]
 task_mm_cid_work+0x217/0x770 kernel/sched/core.c:11997
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 get_signal+0x1235/0x13f0 kernel/signal.c:2678
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f77be99ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f77bf8240e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f77bec16188 RCX: 00007f77be99ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f77bec1618c
RBP: 00007f77bec16180 R08: 00000000007459d1 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f77bec16218 R14: 00007fff63bc8b80 R15: 00007fff63bc8c68
 </TASK>
NMI backtrace for cpu 1
CPU: 1 PID: 10906 Comm: syz.0.1439 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:perf_prepare_sample+0x38/0x1df0 kernel/events/core.c:7755
Code: 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 48 89 54 24 08 48 89 f3 49 89 fc 65 48 8b 04 25 28 00 00 00 48 89 84 24 a0 00 00 00 <49> bd 00 00 00 00 00 fc ff df 48 c7 44 24 60 b3 8a b5 41 48 c7 44
RSP: 0018:ffffc900001efe80 EFLAGS: 00000082
RAX: 02692880f9632200 RBX: ffff88805a6e9860 RCX: ffff8880193b8000
RDX: ffffc900001f0618 RSI: ffff88805a6e9860 RDI: ffffc900001f0180
RBP: ffffc900001eff70 R08: dffffc0000000000 R09: 1ffffffff2239aa0
R10: dffffc0000000000 R11: fffffbfff2239aa1 R12: ffffc900001f0180
R13: ffff88805a6e9860 R14: ffffc900001f0618 R15: 1ffff9200003dff4
FS:  00007f77bf8246c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000007c351000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __perf_event_output kernel/events/core.c:7974 [inline]
 perf_event_output_forward+0x187/0x3e0 kernel/events/core.c:7995
 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9720
 perf_event_overflow kernel/events/core.c:9741 [inline]
 perf_swevent_hrtimer+0x439/0x610 kernel/events/core.c:11230
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x4e1/0xc40 kernel/time/hrtimer.c:1818
 hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1880
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:rcu_read_unlock_special+0x83/0x4d0 kernel/rcu/tree_plugin.h:763
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 ee fd 91 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001f06c0 EFLAGS: 00000206
RAX: 02692880f9632200 RBX: 1ffff9200003e0dc RCX: 02692880f9632200
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9c20
RBP: ffffc900001f0798 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: ffffffff8d137400
R13: dffffc0000000000 R14: ffff8880b8f3cfd0 R15: 1ffff110171e79fa
 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:818 [inline]
 dev_gro_receive+0x15c3/0x22c0 net/core/gro.c:459
 napi_gro_receive+0x381/0xb00 net/core/gro.c:610
 receive_buf+0x2203/0x3820 drivers/net/virtio_net.c:1870
 virtnet_receive drivers/net/virtio_net.c:2155 [inline]
 virtnet_poll+0x5dd/0x1280 drivers/net/virtio_net.c:2229
 __napi_poll+0xc0/0x460 net/core/dev.c:6650
 napi_poll net/core/dev.c:6717 [inline]
 net_rx_action+0x616/0xc40 net/core/dev.c:6853
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1392
Code: 5d 41 5e 41 5f 5d c3 e8 2b 76 29 09 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 41 56 53 66 90 e8 14 20 33 09 e8 4f ba 2e 00 fb 5b <41> 5e 41 5f c3 49 be 00 00 00 00 00 fc ff df 49 89 ff 48 8d 9f 58
RSP: 0018:ffffc90004fd7468 EFLAGS: 00000286
RAX: 02692880f9632200 RBX: ffff8880b8f3cdc8 RCX: 02692880f9632200
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9c20
RBP: ffffc90004fd7690 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: dffffc0000000000
R13: ffff8880193b8000 R14: ffff8880b8f3c080 R15: ffff8880193b8000
 __schedule+0x179f/0x45a0 kernel/sched/core.c:6704
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock_irqrestore+0x111/0x120 kernel/locking/spinlock.c:194
 rcu_report_exp_rnp kernel/rcu/tree_exp.h:225 [inline]
 rcu_preempt_deferred_qs_irqrestore+0x8bb/0xce0 kernel/rcu/tree_plugin.h:570
 rcu_read_unlock_special+0x3d4/0x4d0 kernel/rcu/tree_plugin.h:762
 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:818 [inline]
 sched_mm_cid_remote_clear_old kernel/sched/core.c:11940 [inline]
 task_mm_cid_work+0x217/0x770 kernel/sched/core.c:11997
 task_work_run+0x1d4/0x260 kernel/task_work.c:245
 get_signal+0x1235/0x13f0 kernel/signal.c:2678
 arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f77be99ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f77bf8240e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f77bec16188 RCX: 00007f77be99ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f77bec1618c
RBP: 00007f77bec16180 R08: 00000000007459d1 R09: 0000000000000000
R10: 000000000000004a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f77bec16218 R14: 00007fff63bc8b80 R15: 00007fff63bc8c68
 </TASK>