rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2725 jiffies s: 22497 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: 4841 Comm: syz.2.89 Not tainted 6.1.107-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:set_canary_byte mm/kfence/core.c:304 [inline]
RIP: 0010:for_each_canary mm/kfence/core.c:350 [inline]
RIP: 0010:kfence_guarded_alloc+0x852/0xe40 mm/kfence/core.c:438
Code: 38 4c 8b 6c 24 10 73 48 44 89 fb 80 e3 07 80 f3 aa 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 12 <41> 88 1f 49 ff c7 4d 39 f7 73 22 e8 be 4e a8 ff eb cc 44 89 f9 80
RSP: 0018:ffffc90000007540 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 000000003bde07aa RCX: dffffc0000000000
RDX: 0000000000000100 RSI: ffff88823bde1000 RDI: ffff88823bde00f0
RBP: ffffc90000007650 R08: ffffffff81e25f71 R09: fffff940011def01
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000eb4
R13: ffff88801924b000 R14: ffff88823bde1000 R15: ffff88823bde0750
FS:  00007ff98503a6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc95d305f98 CR3: 0000000028859000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __kfence_alloc+0x340/0x370 mm/kfence/core.c:1048
 kfence_alloc include/linux/kfence.h:128 [inline]
 slab_alloc_node mm/slub.c:3322 [inline]
 kmem_cache_alloc_node+0x29f/0x310 mm/slub.c:3443
 __alloc_skb+0xde/0x670 net/core/skbuff.c:505
 alloc_skb include/linux/skbuff.h:1271 [inline]
 ndisc_alloc_skb+0xee/0x2c0 net/ipv6/ndisc.c:424
 ndisc_send_rs+0x269/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3963
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571
 __do_softirq kernel/softirq.c:605 [inline]
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:654
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:666
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:preempt_schedule_irq+0xf2/0x1c0 kernel/sched/core.c:6870
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 97 00 00 00 bf 01 00 00 00 e8 49 64 af f6 e8 64 60 e2 f6 fb bf 01 00 00 00 <e8> 79 b4 ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 59 1d 33 f7 48
RSP: 0018:ffffc9000395fbc0 EFLAGS: 00000282
RAX: bbd2748fc8fc4f00 RBX: 1ffff9200072bf80 RCX: ffffffff97332103
RDX: dffffc0000000000 RSI: ffffffff8b0c0260 RDI: 0000000000000001
RBP: ffffc9000395fc80 R08: ffffffff90140000 R09: ffffffff90140008
R10: ffffffff90140018 R11: ffffffff90140010 R12: 1ffff9200072bf78
R13: 1ffff9200072bf7c R14: ffffc9000395fbe0 R15: dffffc0000000000
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:do_futex+0x3b7/0x490 kernel/futex/syscalls.c:106
Code: b6 44 35 00 84 c0 48 8b 5c 24 18 75 66 44 8b 44 24 60 48 8b 7c 24 20 44 89 fe 8b 54 24 14 48 8b 4c 24 38 e8 7b a5 00 00 48 98 <e9> 4c ff ff ff 48 8d 4c 24 60 80 e1 07 80 c1 03 38 c1 0f 8c d6 fc
RSP: 0018:ffffc9000395fd40 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff9200072bfb0 RCX: 0000000000040000
RDX: ffffc9000b399000 RSI: 00000000000018f3 RDI: 00000000000018f4
RBP: ffffc9000395fe08 R08: ffffffff817efca6 R09: ffffed1005a49771
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 1ffff9200072bfb4 R14: dffffc0000000000 R15: 0000000000000000
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex+0x3d7/0x460 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff984179eb9
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:00007ff98503a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff984315f88 RCX: 00007ff984179eb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff984315f88
RBP: 00007ff984315f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff984315f8c
R13: 0000000000000000 R14: 00007fff469da4c0 R15: 00007fff469da5a8
 </TASK>