rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2629 jiffies s: 346365 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: 28094 Comm: syz.5.16808 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:strlen+0x59/0x60 lib/string.c:504
Code: ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 8d 1c b6 f7 4c 89 e7 eb d6 5b <41> 5c 41 5e 41 5f c3 55 41 57 41 56 41 55 41 54 53 48 c7 c0 f9 ff
RSP: 0018:ffffc900001dffe0 EFLAGS: 00000046
RAX: 000000000000000d RBX: ffffffff8cb2d638 RCX: 000000008a8d2905
RDX: 0000000000000000 RSI: ffffffff8cb2d620 RDI: ffffffff8a8d29e0
RBP: ffffc900001e0100 R08: 0000000000000002 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1c3f9a6 R12: dffffc0000000000
R13: 1ffff9200003c030 R14: dffffc0000000000 R15: 000000000000000c
FS:  00007f8ada2dd6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbef6a43fe8 CR3: 000000004255c000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000008d24
DR3: 0000000000008d24 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __fortify_strlen include/linux/fortify-string.h:196 [inline]
 trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline]
 perf_trace_lock_acquire+0xd9/0x3e0 include/trace/events/lock.h:24
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x452/0x4a0 kernel/locking/lockdep.c:5633
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 trace_call_bpf+0xe0/0x6b0 kernel/trace/bpf_trace.c:134
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:9997
 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 92 31 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:ffffc900001e0560 EFLAGS: 00000206
RAX: 3c2a1f89e0e33900 RBX: 1ffff9200003c0b4 RCX: 3c2a1f89e0e33900
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc900001e0660 R08: ffffffff90af530f R09: 1ffffffff215ea61
R10: dffffc0000000000 R11: fffffbfff215ea62 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]
 __icmp_send+0x612/0x1410 net/ipv4/icmp.c:793
 ipv4_send_dest_unreach net/ipv4/route.c:1263 [inline]
 ipv4_link_failure+0x667/0xa20 net/ipv4/route.c:1270
 dst_link_failure include/net/dst.h:423 [inline]
 arp_error_report+0x10e/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x22c/0x450 net/core/neighbour.c:1064
 neigh_timer_handler+0x911/0x1080 net/core/neighbour.c:1151
 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:check_mem_access+0x98e/0x19a0 kernel/bpf/verifier.c:-1
Code: 4d 8b 3f 31 ff 4c 89 fe e8 8f da ee ff 4d 85 ff 0f 84 65 04 00 00 e8 a1 d6 ee ff e9 02 07 00 00 e8 97 d6 ee ff e9 a8 07 00 00 <49> bf 00 00 00 00 00 fc ff df 43 80 3c 3e 00 48 8b 5c 24 48 74 08
RSP: 0018:ffffc900035ff090 EFLAGS: 00000246
RAX: ffffffff81939bd2 RBX: 0000000000000006 RCX: 0000000000000002
RDX: ffff888018fed940 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000004 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000006 R11: 0000000000000002 R12: 00000000fffffff0
R13: 0000000000000001 R14: 1ffff11004c2b005 R15: 0000000000000000
 do_check kernel/bpf/verifier.c:12540 [inline]
 do_check_common+0x5a51/0xc6d0 kernel/bpf/verifier.c:14937
 do_check_main kernel/bpf/verifier.c:15000 [inline]
 bpf_check+0xb08f/0x10db0 kernel/bpf/verifier.c:15577
 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: 0033:0x7f8ad939c799
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:00007f8ada2dd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8ad9616090 RCX: 00007f8ad939c799
RDX: 0000000000000042 RSI: 00002000000006c0 RDI: 0000000000000005
RBP: 00007f8ad9432bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8ad9616128 R14: 00007f8ad9616090 R15: 00007ffe5e3ad638
 </TASK>