rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2640 jiffies s: 7577 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4968 Comm: syz.6.111 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:hlock_class kernel/locking/lockdep.c:-1 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4748 [inline] RIP: 0010:__lock_acquire+0x94d/0x7c50 kernel/locking/lockdep.c:4999 Code: 00 00 00 e8 d5 ed 6d 00 4c 0f a3 35 0d 12 4b 0f 73 1a 4b 8d 04 76 c1 e0 06 4c 8d b0 00 91 46 90 49 b8 00 00 00 00 00 fc ff df 2b 49 b8 00 00 00 00 00 fc ff df 48 8b 84 24 90 00 00 00 42 0f RSP: 0018:ffffc900000069a0 EFLAGS: 00000002 RAX: 0000000000004980 RBX: 0000000000000004 RCX: ffffffff8163002b RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90ae1248 RBP: ffffc90000006bf0 R08: dffffc0000000000 R09: fffffbfff215c24a R10: fffffbfff215c24a R11: 1ffffffff215c249 R12: ffff88802c130ba0 R13: ffff88802c130b02 R14: ffffffff9046da80 R15: ffff88802c130ba0 FS: 00007faa2f4576c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb468cb3a90 CR3: 000000005843f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 rcu_lock_acquire include/linux/rcupdate.h:350 [inline] rcu_read_lock include/linux/rcupdate.h:791 [inline] trace_call_bpf+0xe0/0x680 kernel/trace/bpf_trace.c:134 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:9997 perf_trace_lock_acquire+0x329/0x3c0 include/trace/events/lock.h:24 trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x441/0x490 kernel/locking/lockdep.c:5633 seqcount_lockdep_reader_access+0xc6/0x1c0 include/linux/seqlock.h:102 timekeeping_get_delta kernel/time/timekeeping.c:254 [inline] timekeeping_get_ns kernel/time/timekeeping.c:388 [inline] ktime_get_update_offsets_now+0x95/0x3e0 kernel/time/timekeeping.c:2320 hrtimer_update_base kernel/time/hrtimer.c:659 [inline] hrtimer_interrupt+0x5d9/0x9c0 kernel/time/hrtimer.c:1910 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline] __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline] RIP: 0010:__local_bh_enable_ip+0x132/0x1b0 kernel/softirq.c:428 Code: 8a e8 e2 e6 c8 08 65 66 8b 05 6a 2e b5 7e 66 85 c0 75 54 bf 01 00 00 00 e8 7b 44 09 00 e8 86 ba 38 00 fb 65 8b 05 96 fd b3 7e <85> c0 75 05 e8 e5 0e b2 ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00 RSP: 0018:ffffc90000007420 EFLAGS: 00000282 RAX: 0000000000000101 RBX: 0000000000000200 RCX: 73700beb554b1400 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: ffffffff8adefae0 RBP: ffffc900000074b0 R08: dffffc0000000000 R09: fffffbfff215c267 R10: fffffbfff215c267 R11: 1ffffffff215c266 R12: ffffffff88f2d071 R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000e84 local_bh_enable include/linux/bottom_half.h:33 [inline] ip6t_do_table+0x1304/0x14c0 net/ipv6/netfilter/ip6_tables.c:377 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xb9/0x200 net/netfilter/core.c:614 nf_hook+0x211/0x370 include/linux/netfilter.h:257 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip6_output+0x26e/0x3b0 net/ipv6/ip6_output.c:237 dst_output include/net/dst.h:453 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] ndisc_send_skb+0xbfb/0x1510 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3979 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504 expire_timers kernel/time/timer.c:1549 [inline] __run_timers+0x525/0x7c0 kernel/time/timer.c:1820 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5123 Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 10 e0 c8 08 e8 cb b2 2e 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc900040376f8 EFLAGS: 00000282 RAX: 73700beb554b1400 RBX: 0000000000000000 RCX: 73700beb554b1400 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: ffffffff8adefae0 RBP: ffffc90004037750 R08: dffffc0000000000 R09: ffffed10171c7551 R10: ffffed10171c7551 R11: 1ffff110171c7550 R12: ffff88802c130000 R13: dffffc0000000000 R14: ffff88807b3b9dc0 R15: ffff8880b8e3b550 context_switch kernel/sched/core.c:5247 [inline] __schedule+0x10f4/0x40b0 kernel/sched/core.c:6561 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:put_cpu_partial+0x1b0/0x250 mm/slub.c:2661 Code: 3b 44 24 18 0f 85 b4 00 00 00 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 8c cf 46 08 f7 c5 00 02 00 00 74 c0 fb 4d 85 e4 <75> bf eb c8 e8 d7 5f 33 02 85 c0 0f 84 e9 fe ff ff 83 3d a0 32 4f RSP: 0018:ffffc90004037a70 EFLAGS: 00000246 RAX: 73700beb554b1400 RBX: ffff888017441dc0 RCX: 73700beb554b1400 RDX: dffffc0000000000 RSI: ffffffff8a8c0300 RDI: ffffffff8adefae0 RBP: 0000000000000282 R08: dffffc0000000000 R09: fffffbfff1c3ee26 R10: fffffbfff1c3ee26 R11: 1ffffffff1c3ee25 R12: 0000000000000000 R13: 0000000000000001 R14: ffff88802c130000 R15: ffff8880b8f3e760 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1e/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x11a/0x2e0 mm/slub.c:3429 __d_alloc+0x31/0x700 fs/dcache.c:1774 d_alloc_pseudo+0x19/0x70 fs/dcache.c:1904 alloc_file_pseudo+0xc8/0x1f0 fs/file_table.c:265 __anon_inode_getfile fs/anon_inodes.c:122 [inline] anon_inode_getfile+0xc1/0x1a0 fs/anon_inodes.c:160 __do_sys_perf_event_open kernel/events/core.c:12604 [inline] __se_sys_perf_event_open+0xbf0/0x1e60 kernel/events/core.c:12378 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7faa2e58ebe9 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:00007faa2f457038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007faa2e7b5fa0 RCX: 00007faa2e58ebe9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000540 RBP: 00007faa2e611e19 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa2e7b6038 R14: 00007faa2e7b5fa0 R15: 00007ffdaa848628