rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2691 jiffies s: 115465 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: 22340 Comm: syz.4.4653 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:match_held_lock+0x0/0xb0 kernel/locking/lockdep.c:5121
Code: 03 00 75 cf 48 c7 c7 40 17 8c 8a 48 c7 c6 80 17 8c 8a e8 43 2c 1b f7 0f 0b eb b6 e8 ca fa ff ff 66 2e 0f 1f 84 00 00 00 00 00 <b9> 01 00 00 00 48 39 77 10 74 6c 53 81 7f 20 00 00 10 00 72 5f 48
RSP: 0018:ffffc900000070b0 EFLAGS: 00000087
RAX: 0000000000000004 RBX: ffff888054fb3c00 RCX: 0000000000000000
RDX: ffff888054fb3c00 RSI: ffffffff8cb2d7e0 RDI: ffff888054fb4730
RBP: 00000000ffffffff R08: dffffc0000000000 R09: 1ffffffff2161e48
R10: dffffc0000000000 R11: fffffbfff2161e49 R12: 0000000000000002
R13: 0000000000000046 R14: ffffffff8cb2d7e0 R15: ffff888054fb4730
FS:  00007f85bc5e46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000b000 CR3: 00000000419c8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __lock_is_held kernel/locking/lockdep.c:5419 [inline]
 lock_is_held_type+0xa6/0x190 kernel/locking/lockdep.c:5721
 trace_call_bpf+0x19e/0x6b0 kernel/trace/bpf_trace.c:135
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10037
 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 32 7b 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:ffffc90000007420 EFLAGS: 00000206
RAX: 8bdfc8b43a32ec00 RBX: 1ffff92000000e8c RCX: 8bdfc8b43a32ec00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf68a0
RBP: ffffc90000007510 R08: ffffffff90b0f337 R09: 1ffffffff2161e66
R10: dffffc0000000000 R11: fffffbfff2161e67 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 is_bpf_text_address+0x27a/0x2a0 kernel/bpf/core.c:738
 kernel_text_address+0x9c/0xd0 kernel/extable.c:125
 __kernel_text_address+0x9/0x30 kernel/extable.c:79
 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
 arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
 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
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc_node_track_caller+0xb0/0x240 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]
 ndisc_alloc_skb+0xa6/0x450 net/ipv6/ndisc.c:423
 ndisc_send_rs+0x279/0x690 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x367/0x640 net/ipv6/addrconf.c:3986
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x7a/0x80 kernel/kcov.c:318
Code: c1 e1 05 4c 8d 51 28 4d 39 ca 77 1e 49 ff c0 4c 89 02 48 c7 44 0a 08 07 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 <c3> 0f 1f 44 00 00 48 8b 46 08 48 8d 48 ff 48 89 c2 48 31 ca 48 39
RSP: 0018:ffffc9000d43fb80 EFLAGS: 00000297
RAX: ffffffff8139f091 RBX: 000000005480bd20 RCX: ffff888054fb3c00
RDX: 0000000000000002 RSI: 0000000000000008 RDI: 0000000000000000
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff2161e48
R10: dffffc0000000000 R11: fffffbfff2161e49 R12: dffffc0000000000
R13: ffffea000000000f R14: ffffffff8139ef78 R15: ffff88813fff9140
 pfn_valid include/linux/mmzone.h:1866 [inline]
 __virt_addr_valid+0x2a1/0x540 arch/x86/mm/physaddr.c:65
 check_heap_object mm/usercopy.c:188 [inline]
 __check_object_size+0x106/0xa70 mm/usercopy.c:250
 check_object_size include/linux/thread_info.h:199 [inline]
 check_copy_size include/linux/thread_info.h:235 [inline]
 copy_from_user include/linux/uaccess.h:160 [inline]
 generic_map_update_batch+0x4ce/0x7f0 kernel/bpf/syscall.c:1706
 bpf_map_do_batch+0x475/0x5f0 kernel/bpf/syscall.c:-1
 __sys_bpf+0x6f7/0x780 kernel/bpf/syscall.c:-1
 __do_sys_bpf kernel/bpf/syscall.c:5136 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5134 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5134
 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: 0033:0x7f85bb79e159
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:00007f85bc5e4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f85bba25fa0 RCX: 00007f85bb79e159
RDX: 0000000000000038 RSI: 0000200000000200 RDI: 000000000000001a
RBP: 00007f85bb83506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f85bba26038 R14: 00007f85bba25fa0 R15: 00007ffffc5aab58
 </TASK>