rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2677 jiffies s: 5177 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: 5619 Comm: syz.0.454 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:rcu_read_lock include/linux/rcupdate.h:792 [inline] RIP: 0010:__perf_output_begin kernel/events/ring_buffer.c:163 [inline] RIP: 0010:perf_output_begin_forward+0xc7/0xa70 kernel/events/ring_buffer.c:272 Code: 34 c4 ff 48 8d 05 00 00 00 00 48 c7 c7 a0 d8 92 8d 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 50 e8 dd 2e bb ff 48 83 c4 08 54 0f 8b 08 41 89 c7 31 ff 89 c6 e8 88 79 d9 ff 45 85 ff 74 10 RSP: 0018:ffffc90000006ec0 EFLAGS: 00000096 RAX: 3354ccc3de17dc00 RBX: ffff8880795e3600 RCX: 3354ccc3de17dc00 RDX: 0000000000000000 RSI: ffffffff8a8c2b20 RDI: ffffffff8adf71a0 RBP: ffffc90000006ff0 R08: dffffc0000000000 R09: 1ffffffff2326848 R10: dffffc0000000000 R11: fffffbfff2326849 R12: 1ffff92000000de8 R13: ffffc90000007040 R14: 0000000000000008 R15: dffffc0000000000 FS: 00007f087d5c66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5fb6c6020c CR3: 0000000057677000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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_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 68 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: 3354ccc3de17dc00 RBX: 1ffff92000000ef4 RCX: 3354ccc3de17dc00 RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf71a0 RBP: ffffc90000007860 R08: ffffffff91934337 R09: 1ffffffff2326866 R10: dffffc0000000000 R11: fffffbfff2326867 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8c3bb00 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+0xdc2/0x1520 net/ipv6/ndisc.c:521 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3994 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_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:trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:lock_release+0x891/0x920 kernel/locking/lockdep.c:5801 Code: e8 64 16 6f 00 48 8b 1d c5 20 88 0d 48 85 db 74 35 48 83 c3 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 35 16 6f 00 48 8b 3b 48 8b 74 24 10 48 8b 54 24 RSP: 0018:ffffc9000356e300 EFLAGS: 00000246 RAX: 1ffff11003f4a953 RBX: ffff88801fa54a98 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f00d228 RBP: ffffc9000356e410 R08: ffffffff8f00d22f R09: 1ffffffff1e01a45 R10: dffffc0000000000 R11: fffffbfff1e01a46 R12: 1ffff920006adc6c R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920006adc6c rcu_lock_release include/linux/rcupdate.h:355 [inline] rcu_read_unlock include/linux/rcupdate.h:824 [inline] trace_call_bpf+0x5ca/0x6b0 kernel/trace/bpf_trace.c:137 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10037 perf_trace_lock+0x301/0x390 include/trace/events/lock.h:50 trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x8ad/0x920 kernel/locking/lockdep.c:5801 might_alloc include/linux/sched/mm.h:271 [inline] slab_pre_alloc_hook+0x2a/0x300 mm/slab.h:710 slab_alloc_node mm/slub.c:3279 [inline] __kmem_cache_alloc_node+0x4f/0x270 mm/slub.c:3398 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node_track_caller+0xa0/0x240 mm/slab_common.c:956 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x226/0x7d0 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1303 [inline] nlmsg_new include/net/netlink.h:998 [inline] rtmsg_ifinfo_build_skb+0x80/0x190 net/core/rtnetlink.c:3980 rtmsg_ifinfo_event net/core/rtnetlink.c:4018 [inline] rtnetlink_event+0xd1/0x1a0 net/core/rtnetlink.c:6217 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xcb/0x160 kernel/notifier.c:455 netdev_lower_state_changed+0xd1/0x150 net/core/dev.c:8431 bond_lower_state_changed drivers/net/bonding/bond_main.c:1814 [inline] bond_commit_link_state include/net/bonding.h:631 [inline] bond_set_slave_link_state+0x1b3/0x3a0 include/net/bonding.h:645 bond_enslave+0x1657/0x3820 drivers/net/bonding/bond_main.c:-1 do_set_master net/core/rtnetlink.c:2642 [inline] do_setlink+0xd66/0x29c0 net/core/rtnetlink.c:2852 __rtnl_newlink net/core/rtnetlink.c:3622 [inline] rtnl_newlink+0x16e4/0x1f90 net/core/rtnetlink.c:3669 rtnetlink_rcv_msg+0x863/0xfb0 net/core/rtnetlink.c:6166 netlink_rcv_skb+0x1ef/0x440 net/netlink/af_netlink.c:2516 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x7ad/0x920 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5ed/0x9a0 net/socket.c:2519 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2573 __sys_sendmsg net/socket.c:2602 [inline] __do_sys_sendmsg net/socket.c:2611 [inline] __se_sys_sendmsg+0x1c3/0x2b0 net/socket.c:2609 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: 0033:0x7f087c79e1d9 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:00007f087d5c6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f087ca25fa0 RCX: 00007f087c79e1d9 RDX: 0000000020040000 RSI: 0000200000000600 RDI: 0000000000000006 RBP: 00007f087c835888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f087ca26038 R14: 00007f087ca25fa0 R15: 00007fffbbacf888