rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2683 jiffies s: 2321 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: 4479 Comm: syz.3.22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__kasan_check_read+0x6/0x10 mm/kasan/shadow.c:31
Code: 41 5f 5d c3 48 c7 c7 90 c5 61 8c eb 0a 48 c7 c7 46 4e 46 8c 48 89 de e8 98 95 52 08 31 ed eb d7 00 00 cc cc 89 f6 48 8b 0c 24 <31> d2 e9 c3 ec ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9
RSP: 0018:ffffc90000006cf8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888025560000 RCX: ffffffff8164c3c4
RDX: 0000000000000008 RSI: 0000000000000008 RDI: ffffffff90b13240
RBP: 0000000000000009 R08: dffffc0000000000 R09: 1ffffffff2162648
R10: dffffc0000000000 R11: fffffbfff2162649 R12: 0000000000000200
R13: dffffc0000000000 R14: ffff888025560b58 R15: 000000000000002d
FS:  0000555578997500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb43d5da08 CR3: 0000000056ea2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 mark_lock+0x94/0x320 kernel/locking/lockdep.c:4611
 mark_usage kernel/locking/lockdep.c:4554 [inline]
 __lock_acquire+0xdf7/0x7c40 kernel/locking/lockdep.c:5017
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 __perf_output_begin kernel/events/ring_buffer.c:163 [inline]
 perf_output_begin_forward+0xc3/0xa70 kernel/events/ring_buffer.c:272
 __perf_event_output kernel/events/core.c:7742 [inline]
 perf_event_output_forward+0x1ad/0x2f0 kernel/events/core.c:7760
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9506
 perf_swevent_overflow+0x19b/0x230 kernel/events/core.c:9589
 perf_swevent_event+0x458/0x570 kernel/events/core.c:-1
 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10074
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10042
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_finish+0x13f/0x180 kernel/trace/trace_preemptirq.c:67
 irqentry_enter+0x33/0x50 kernel/entry/common.c:382
 sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:114 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x173/0x290 mm/kasan/generic.c:189
Code: 00 00 00 41 29 ee 4d 01 f3 49 89 df 4d 29 df 4d 8d 67 07 4d 85 ff 4d 0f 49 e7 49 c1 ec 03 45 85 e4 74 21 45 31 f6 4f 8b 3c 33 <4d> 85 ff 75 40 49 83 c6 08 41 ff cc 75 ee 4c 29 db 4c 29 f3 4d 01
RSP: 0018:ffffc90000007978 EFLAGS: 00000246
RAX: 0000000000000201 RBX: ffffed1005f8ed59 RCX: ffffffff882ef8cc
RDX: 0000000000000001 RSI: 00000000000000c8 RDI: ffff88802fc76a00
RBP: 0000000000000000 R08: ffff88802fc76ac7 R09: 1ffff11005f8ed58
R10: dffffc0000000000 R11: ffffed1005f8ed40 R12: 0000000000000003
R13: 0000000000000a20 R14: 0000000000000000 R15: 0000000000000000
 memset+0x1e/0x40 mm/kasan/shadow.c:44
 __alloc_skb+0x28c/0x7d0 net/core/skbuff.c:529
 alloc_skb include/linux/skbuff.h:1303 [inline]
 ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423
 ndisc_send_rs+0x279/0x690 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3986
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> df 69 1d f7 65 8b 05 e0 0a c7 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc90003577880 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: 405b0c5e3450cf00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: 0000000000000001
RBP: ffffc90003577918 R08: ffffffff96ea0c3b R09: 1ffffffff2dd4187
R10: dffffc0000000000 R11: fffffbfff2dd4188 R12: dffffc0000000000
R13: ffff888078188000 R14: ffffffff96ea0c38 R15: 1ffff920006aef10
 __debug_check_no_obj_freed lib/debugobjects.c:1054 [inline]
 debug_check_no_obj_freed+0x471/0x520 lib/debugobjects.c:1075
 free_pages_prepare mm/page_alloc.c:1493 [inline]
 free_pcp_prepare mm/page_alloc.c:1537 [inline]
 free_unref_page_prepare+0x2c3/0x9e0 mm/page_alloc.c:3414
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3509
 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:306
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x18b/0x2f0 mm/slub.c:3383
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 lsm_file_alloc security/security.c:579 [inline]
 security_file_alloc+0x30/0x110 security/security.c:1547
 __alloc_file+0xc2/0x230 fs/file_table.c:143
 alloc_empty_file+0x90/0x180 fs/file_table.c:187
 alloc_file+0x5b/0x5f0 fs/file_table.c:229
 alloc_file_pseudo+0x180/0x200 fs/file_table.c:272
 __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:12654 [inline]
 __se_sys_perf_event_open+0xc2a/0x1ec0 kernel/events/core.c:12428
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ffb42f9e159
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:00007ffe3c276b08 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007ffb43225fa0 RCX: 00007ffb42f9e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007ffb43035024 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffb43225fac R14: 00007ffb43225fa0 R15: 00007ffb43225fa0
 </TASK>