rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5316 1-.... } 3367 jiffies s: 8289 root: 0x2/T rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5644 Comm: syz.9.376 Not tainted 6.1.129-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:debug_smp_processor_id+0xe/0x10 lib/smp_processor_id.c:60 Code: c7 c7 80 d4 3c 8d 48 89 de e8 ce cf bd f9 e9 6d ff ff ff cc cc cc cc cc cc cc cc cc 48 c7 c7 20 6d 5f 8b 48 c7 c6 60 6d 5f 8b 00 41 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 RSP: 0018:ffffc900001dfb88 EFLAGS: 00000006 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000010102 RDX: ffff888019ef8000 RSI: ffffffff8b5f6d60 RDI: ffffffff8b5f6d20 RBP: ffffc900001dfcf0 R08: ffffffff81b403af R09: fffffbfff2256c4d R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff9200003bf88 R14: 0000000000000008 R15: ffffc900001dfd40 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b307f3000 CR3: 00000000328c5000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online+0x33/0x120 kernel/rcu/tree.c:768 rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_held+0x1a/0x40 kernel/rcu/update.c:309 __perf_output_begin kernel/events/ring_buffer.c:170 [inline] perf_output_begin_forward+0x1bd/0xaf0 kernel/events/ring_buffer.c:271 __perf_event_output kernel/events/core.c:7708 [inline] perf_event_output_forward+0x1e5/0x330 kernel/events/core.c:7726 __perf_event_overflow+0x45e/0x640 kernel/events/core.c:9472 perf_swevent_hrtimer+0x38e/0x4f0 kernel/events/core.c:10880 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline] __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:unwind_next_frame+0x1770/0x2220 arch/x86/kernel/unwind_orc.c:598 Code: 48 0f b6 04 28 84 c0 0f 85 50 06 00 00 41 0f b7 75 00 c1 ee 04 83 e6 0f 83 fe 04 0f 84 cd 00 00 00 83 fe 01 0f 84 24 01 00 00 <85> f6 0f 85 e2 02 00 00 48 8b 44 24 40 80 3c 28 00 74 08 4c 89 ff RSP: 0018:ffffc900001e0440 EFLAGS: 00000297 RAX: 0000000000000000 RBX: 1ffffffff1e40a58 RCX: 0000000000000000 RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900001e0580 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffc900001e0570 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001e0520 R13: ffffffff8f2052c0 R14: ffffffff8f2052bc R15: ffffc900001e0570 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443 __alloc_skb+0xd3/0x2c0 net/core/skbuff.c:505 alloc_skb include/linux/skbuff.h:1271 [inline] ndisc_alloc_skb+0xa4/0x450 net/ipv6/ndisc.c:423 ndisc_send_rs+0x234/0x5a0 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x357/0x610 net/ipv6/addrconf.c:3982 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:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673 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:lock_acquire+0x26f/0x5a0 kernel/locking/lockdep.c:5666 Code: 2b 00 74 08 4c 89 f7 e8 9f 49 77 00 f6 44 24 61 02 0f 85 84 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25 RSP: 0018:ffffc900035371a0 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920006a6e40 RCX: ffffffff816b6102 RDX: dffffc0000000000 RSI: ffffffff8b0c2ec0 RDI: ffffffff8b5f6d80 RBP: ffffc900035372f8 R08: dffffc0000000000 R09: fffffbfff2256c4d R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920006a6e3c R13: dffffc0000000000 R14: ffffc90003537200 R15: 0000000000000246 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] zap_pte_range mm/memory.c:1417 [inline] zap_pmd_range mm/memory.c:1574 [inline] zap_pud_range mm/memory.c:1603 [inline] zap_p4d_range mm/memory.c:1624 [inline] unmap_page_range+0xacc/0x2740 mm/memory.c:1645 unmap_vmas+0x48b/0x640 mm/memory.c:1730 exit_mmap+0x249/0x980 mm/mmap.c:3238 __mmput+0x115/0x3c0 kernel/fork.c:1200 exit_mm+0x226/0x300 kernel/exit.c:565 do_exit+0x9f1/0x26a0 kernel/exit.c:858 do_group_exit+0x202/0x2b0 kernel/exit.c:1021 get_signal+0x16cb/0x17a0 kernel/signal.c:2871 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f4fb218d169 Code: Unable to access opcode bytes at 0x7f4fb218d13f. RSP: 002b:00007f4fb2f12038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff5 RBX: 00007f4fb23a5fa0 RCX: 00007f4fb218d169 RDX: 0000000000000048 RSI: 0000400000000140 RDI: 0000000000000005 RBP: 00007f4fb220e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4fb23a5fa0 R15: 00007ffebcf6cde8