rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (180 ticks this GP) idle=4ff/1/0x4000000000000002 softirq=11495/11495 fqs=2068 
	(detected by 1, t=10503 jiffies, g=15149, q=1715)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5520 Comm: syz.0.395 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:check_region_inline mm/kasan/generic.c:-1 [inline]
RIP: 0010:kasan_check_range+0x33/0x290 mm/kasan/generic.c:189
Code: 00 00 55 41 57 41 56 41 54 53 49 89 f8 49 01 f0 0f 82 0e 02 00 00 49 89 f8 49 c1 e8 2f 41 81 f8 ff ff 01 00 0f 82 fa 01 00 00 <49> bc 01 00 00 00 00 fc ff df 49 89 fe 49 c1 ee 03 49 ba 00 00 00
RSP: 0018:ffffc90000007750 EFLAGS: 00000046
RAX: 0000000000008401 RBX: ffff8880b903b308 RCX: ffffffff89b9de1f
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b903b308
RBP: ffffc90000007848 R08: 000000000001ffff R09: 1ffffffff1b13c0d
R10: dffffc0000000000 R11: fffffbfff1b13c0e R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880b903b1c0 R15: 4000000000000002
FS:  00007f40796096c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6a3eeeff8 CR3: 0000000022de2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:27 [inline]
 rcu_nmi_exit+0x6f/0xf0 kernel/rcu/tree.c:-1
 rcu_irq_exit_irqson+0x92/0x120 kernel/rcu/tree.c:841
 trace_irq_enable_rcuidle+0x11e/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
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 c2 22 9d 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:ffffc90000007940 EFLAGS: 00000206
RAX: 57da72fca3365b00 RBX: 1ffff92000000f2c RCX: 57da72fca3365b00
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a79c980
RBP: ffffc90000007a20 R08: ffffffff901cb1c7 R09: 1ffffffff2039638
R10: dffffc0000000000 R11: fffffbfff2039639 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ipv6_get_lladdr+0x333/0x3b0 net/ipv6/addrconf.c:1899
 addrconf_rs_timer+0x25f/0x640 net/ipv6/addrconf.c:3958
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:strlen+0x1b/0x60 lib/string.c:581
Code: e4 4c 89 f7 e8 86 72 b8 fd eb da 0f 1f 40 00 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb <49> 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3
RSP: 0018:ffffc9000334f1b8 EFLAGS: 00000202
RAX: 0000000000000013 RBX: ffffffff8a357194 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c3ef360 RDI: ffffffff8a357180
RBP: ffffc9000334f2e0 R08: 0000000000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1b13c0e R12: ffffffff8c3ef360
R13: 1ffff92000669e44 R14: dffffc0000000000 R15: 0000000000000012
 trace_event_get_offsets_lock_acquire include/trace/events/lock.h:23 [inline]
 perf_trace_lock_acquire+0xc6/0x3f0 include/trace/events/lock.h:13
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x3d7/0x400 kernel/locking/lockdep.c:5594
 fs_reclaim_acquire+0x91/0x100 mm/page_alloc.c:4597
 prepare_alloc_pages+0x156/0x5b0 mm/page_alloc.c:5272
 __alloc_pages+0x11b/0x480 mm/page_alloc.c:5490
 __pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
 pte_alloc_one+0x7b/0x310 arch/x86/mm/pgtable.c:33
 __pte_alloc+0x21/0x150 mm/memory.c:439
 copy_pte_range mm/memory.c:1032 [inline]
 copy_pmd_range mm/memory.c:1167 [inline]
 copy_pud_range mm/memory.c:1204 [inline]
 copy_p4d_range mm/memory.c:1228 [inline]
 copy_page_range+0x2ab2/0x32c0 mm/memory.c:1301
 dup_mmap kernel/fork.c:616 [inline]
 dup_mm kernel/fork.c:1467 [inline]
 copy_mm+0xc61/0x13d0 kernel/fork.c:1519
 copy_process+0x17fb/0x3ec0 kernel/fork.c:2291
 kernel_clone+0x23f/0x990 kernel/fork.c:2681
 __do_sys_clone kernel/fork.c:2798 [inline]
 __se_sys_clone kernel/fork.c:2782 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2782
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f407b3d0e59
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:00007f4079608fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f407b64a090 RCX: 00007f407b3d0e59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000061000600
RBP: 00007f407b466e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f407b64a128 R14: 00007f407b64a090 R15: 00007ffdac7615c8
 </TASK>