rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2691 jiffies s: 163477 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: 27315 Comm: syz.9.15486 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:perf_trace_buf_alloc+0x24/0x300 kernel/trace/trace_event_perf.c:409
Code: 66 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 50 49 89 d7 49 89 f6 89 fb e8 18 e9 f7 ff bf 00 20 00 00 89 de e8 6c ec f7 ff <81> fb 01 20 00 00 7c 19 80 3d 85 fc 80 0c 01 0f 85 cd 01 00 00 e8
RSP: 0018:ffffc90000007560 EFLAGS: 00000046
RAX: ffffffff818a8c44 RBX: 0000000000000014 RCX: 0000000000000100
RDX: ffff888029df8000 RSI: 0000000000000014 RDI: 0000000000002000
RBP: ffffc90000007668 R08: ffff8880b8e3580b R09: 1ffff110171c6b01
R10: dffffc0000000000 R11: ffffed10171c6b02 R12: ffffffff8cb7fc20
R13: ffffe8ffffc35088 R14: ffffc900000075e0 R15: ffffc90000007600
FS:  00007fddeb87b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2430323440 CR3: 0000000030fc1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_trace_preemptirq_template+0x143/0x320 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
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 d2 33 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007760 EFLAGS: 00000206
RAX: dcccae3f9eed0600 RBX: 1ffff92000000ef4 RCX: dcccae3f9eed0600
RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: ffffffff8adf1320
RBP: ffffc90000007860 R08: ffffffff90af9337 R09: 1ffffffff215f266
R10: dffffc0000000000 R11: fffffbfff215f267 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_send_skb+0xd9d/0x14e0 net/ipv6/ndisc.c:521
 addrconf_rs_timer+0x2d1/0x630 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x2a1/0x930 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_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:kasan_quarantine_put+0x84/0x220 mm/kasan/quarantine.c:245
Code: e8 71 54 b5 ff 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f 85 83 00 00 00 41 f7 c7 00 02 00 00 74 01 fb 31 c0 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f c3 48 8d 80 00 67 03 00 45
RSP: 0018:ffffc900037df5a8 EFLAGS: 00000206
RAX: dcccae3f9eed0601 RBX: ffff888073128360 RCX: dcccae3f9eed0600
RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: ffffffff8adf1320
RBP: ffff888073128360 R08: ffffffff90af9277 R09: 1ffffffff215f24e
R10: dffffc0000000000 R11: fffffbfff215f24f R12: 0000000000000000
R13: ffffc900037df640 R14: 000000000002f758 R15: 0000000000000286
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0xf7/0x290 mm/slub.c:3709
 remove_vma mm/mmap.c:144 [inline]
 exit_mmap+0x4a0/0x960 mm/mmap.c:3272
 __mmput+0x118/0x3c0 kernel/fork.c:1205
 mmput kernel/fork.c:1227 [inline]
 dup_mm kernel/fork.c:1562 [inline]
 copy_mm+0x1429/0x1690 kernel/fork.c:1595
 copy_process+0x1979/0x4030 kernel/fork.c:2356
 kernel_clone+0x24b/0x900 kernel/fork.c:2762
 __do_sys_clone kernel/fork.c:2903 [inline]
 __se_sys_clone kernel/fork.c:2887 [inline]
 __x64_sys_clone+0x1a7/0x220 kernel/fork.c:2887
 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: 0033:0x7fddea99cdd9
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:00007fddeb87afd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fddeac15fa0 RCX: 00007fddea99cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000041064400
RBP: 00007fddeaa32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fddeac16038 R14: 00007fddeac15fa0 R15: 00007fff49c23b78
 </TASK>