rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2628 jiffies s: 1129 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4427 Comm: syz.1.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:228 [inline]
RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:240 [inline]
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0x94/0x320 kernel/locking/lockdep.c:4606
Code: 22 02 00 00 41 8b 07 41 89 c7 41 81 e7 ff 1f 00 00 c1 e8 03 25 f8 03 00 00 48 8d b8 40 32 af 90 be 08 00 00 00 e8 ac 63 6e 00 <4c> 0f a3 3d f4 36 4a 0f 73 10 4b 8d 04 7f c1 e0 06 4c 8d b8 00 b1
RSP: 0018:ffffc900001e05a0 EFLAGS: 00000056
RAX: 0000000000000001 RBX: ffff888024be9dc0 RCX: ffffffff8164fb44
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90af3330
RBP: 0000000000000002 R08: ffffffff90af3337 R09: 1ffffffff215e666
R10: dffffc0000000000 R11: fffffbfff215e667 R12: 0000000000000004
R13: dffffc0000000000 R14: ffff888024bea8a0 R15: 0000000000000781
FS:  00007ff36d60a6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f70dff8 CR3: 000000002fc7d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 mark_held_locks kernel/locking/lockdep.c:4230 [inline]
 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4248 [inline]
 lockdep_hardirqs_on_prepare+0x249/0x770 kernel/locking/lockdep.c:4315
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 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 92 30 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:ffffc900001e0760 EFLAGS: 00000206
RAX: e14434addb6c9700 RBX: 1ffff9200003c0f4 RCX: e14434addb6c9700
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0c20
RBP: ffffc900001e0860 R08: ffffffff90af3337 R09: 1ffffffff215e666
R10: dffffc0000000000 R11: fffffbfff215e667 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __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:unwind_next_frame+0x3f8/0x20b0 arch/x86/kernel/unwind_orc.c:461
Code: 39 17 00 00 41 c6 06 01 49 c7 c4 40 87 89 8a 49 8d 6c 24 04 4d 8d 7c 24 05 48 89 e8 48 c1 e8 03 48 89 44 24 48 42 0f b6 04 28 <84> c0 0f 85 72 16 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90004b26a70 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffc90004b26b48 RCX: ffffffff8e3600a4
RDX: ffffffff8ea8efaa RSI: ffffffff8e3600a0 RDI: ffffffff8139198f
RBP: ffffffff8ea8efae R08: 0000000000000001 R09: 0000000000000003
R10: dffffc0000000000 R11: fffff52000964d75 R12: ffffffff8ea8efaa
R13: dffffc0000000000 R14: ffffffff8e3600a0 R15: ffffffff8ea8efaf
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384
 kmalloc_node include/linux/slab.h:585 [inline]
 kzalloc_node include/linux/slab.h:710 [inline]
 __get_vm_area_node+0x122/0x330 mm/vmalloc.c:2506
 __vmalloc_node_range+0x357/0x13b0 mm/vmalloc.c:3203
 __vmalloc_node mm/vmalloc.c:3308 [inline]
 vmalloc+0x75/0x80 mm/vmalloc.c:3341
 bpf_prog_calc_tag+0xde/0x670 kernel/bpf/core.c:287
 resolve_pseudo_ldimm64+0xdd/0x1040 kernel/bpf/verifier.c:13028
 bpf_check+0xa9b6/0x10db0 kernel/bpf/verifier.c:15562
 bpf_prog_load+0x101a/0x1560 kernel/bpf/syscall.c:2651
 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5030
 __do_sys_bpf kernel/bpf/syscall.c:5134 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5132 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5132
 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: 0033:0x7ff36c79aeb9
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:00007ff36d60a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff36ca15fa0 RCX: 00007ff36c79aeb9
RDX: 0000000000000048 RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007ff36c808c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff36ca16038 R14: 00007ff36ca15fa0 R15: 00007ffd7a2b5728
 </TASK>