rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 3578 jiffies s: 13717 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: 7521 Comm: syz.4.872 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:debug_lockdep_rcu_enabled+0xb/0x30 kernel/rcu/update.c:280
Code: 8c 8a 48 c7 c6 20 3a 8c 8a e8 91 d8 22 f7 0f 0b eb d1 00 00 cc cc 00 00 cc cc 00 00 cc cc 00 31 c0 83 3d 77 30 f5 03 00 74 1d <83> 3d 02 64 f5 03 00 74 14 65 48 8b 0d 14 8f d7 75 31 c0 83 b9 dc
RSP: 0018:ffffc90000007258 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000000 RCX: be873d341bb82900
RDX: 0000000000000000 RSI: ffffffff8a8c2920 RDI: ffffffff8adee1a0
RBP: ffffc90000007358 R08: dffffc0000000000 R09: 1ffffffff215e448
R10: dffffc0000000000 R11: fffffbfff215e449 R12: ffffffff8cb80140
R13: 1ffff92000000e58 R14: ffff8880b8e35558 R15: 0000000000000000
FS:  00007f23eade86c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f20947f8ff8 CR3: 000000004a28f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_read_lock include/linux/rcupdate.h:792 [inline]
 trace_call_bpf+0xe9/0x6b0 kernel/trace/bpf_trace.c:134
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10027
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_finish+0x13f/0x180 kernel/trace/trace_preemptirq.c:67
 irqentry_enter+0x33/0x50 kernel/entry/common.c:382
 sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:56 [inline]
RIP: 0010:unwind_next_frame+0x167a/0x1fd0 arch/x86/kernel/unwind_orc.c:622
Code: 42 80 3c 28 00 74 05 e8 d4 37 9a 00 4c 8b 63 08 4c 8d 73 10 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 b6 37 9a 00 <49> 8b 06 4d 39 fc 0f 96 c1 4c 39 f8 0f 97 c2 20 ca 80 fa 01 75 7f
RSP: 0018:ffffc900000075a0 EFLAGS: 00000246
RAX: 1ffff92000000ecb RBX: ffffc90000007648 RCX: 0000000000000000
RDX: 1ffffffff1d3ea07 RSI: 0000000000000000 RDI: ffffc90000007650
RBP: dffffc0000000000 R08: ffffc900000076a7 R09: ffffc90000007698
R10: dffffc0000000000 R11: fffff52000000ed5 R12: ffffc90000000000
R13: dffffc0000000000 R14: ffffc90000007658 R15: ffffc90000007ff8
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xb2/0xc0 mm/kasan/generic.c:486
 call_rcu+0x14f/0x950 kernel/rcu/tree.c:2849
 inet_frag_destroy+0x1b3/0x230 net/ipv4/inet_fragment.c:303
 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_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6874
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 55 44 25 f7 e8 70 0f 55 f7 fb bf 01 00 00 00 <e8> 25 ba ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000e0defa0 EFLAGS: 00000286
RAX: be873d341bb82900 RBX: 0000000000000000 RCX: be873d341bb82900
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 0000000000000001
RBP: ffffc9000e0df050 R08: ffffffff8fa07008 R09: ffffffff8fa07018
R10: ffffffff8fa07010 R11: ffffffff8fa07003 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001c1bdf4
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x61/0xe0 kernel/kcov.c:349
Code: 57 41 56 41 54 53 48 8d 4c 09 01 48 8b 54 24 20 65 4c 8b 05 81 49 80 7e 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 <65> 44 8b 1d 6f 49 80 7e 41 81 e3 00 01 ff 00 74 13 41 81 fb 00 01
RSP: 0018:ffffc9000e0df118 EFLAGS: 00000202
RAX: 0000000000000005 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffffffff8194ccdc RSI: ffffffff8cba3250 RDI: 0000000000000000
RBP: ffffc9000e0df410 R08: ffff8880303c5a00 R09: 0000000000000004
R10: 00000000000000c0 R11: 0000000000000002 R12: 0000000000000000
R13: 1ffff92001dc2a17 R14: ffffc9000ee150b9 R15: 0000000000000000
 check_alu_op kernel/bpf/verifier.c:9613 [inline]
 do_check kernel/bpf/verifier.c:12523 [inline]
 do_check_common+0x704c/0xc560 kernel/bpf/verifier.c:14943
 do_check_main kernel/bpf/verifier.c:15006 [inline]
 bpf_check+0x3ea7/0x11000 kernel/bpf/verifier.c:15583
 bpf_prog_load+0x100e/0x1530 kernel/bpf/syscall.c:2651
 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5031
 __do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
 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: 0033:0x7f23e9f9ce59
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:00007f23eade8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f23ea215fa0 RCX: 00007f23e9f9ce59
RDX: 0000000000000048 RSI: 00002000000054c0 RDI: 0000000000000005
RBP: 00007f23ea032e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f23ea216038 R14: 00007f23ea215fa0 R15: 00007ffce98c79f8
 </TASK>