------------[ cut here ]------------
WARNING: CPU: 1 PID: 6780 at kernel/bpf/helpers.c:778 bpf_try_get_buffers kernel/bpf/helpers.c:778 [inline]
WARNING: CPU: 1 PID: 6780 at kernel/bpf/helpers.c:778 bpf_bprintf_prepare+0x12cf/0x13a0 kernel/bpf/helpers.c:831
Modules linked in:
CPU: 1 UID: 0 PID: 6780 Comm: syz.0.81 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:bpf_try_get_buffers kernel/bpf/helpers.c:778 [inline]
RIP: 0010:bpf_bprintf_prepare+0x12cf/0x13a0 kernel/bpf/helpers.c:831
Code: ff e9 ce fe ff ff e8 20 b2 e0 ff e9 be fe ff ff e8 16 b2 e0 ff e9 b4 fe ff ff e8 0c b2 e0 ff e9 aa fe ff ff e8 02 b2 e0 ff 90 <0f> 0b 90 65 ff 0d 67 0d 90 10 b8 f0 ff ff ff e9 17 ff ff ff e8 e8
RSP: 0018:ffffc90000a07a00 EFLAGS: 00010006
RAX: ffffffff81df57be RBX: ffffc90000a07bd0 RCX: ffff88802bd6bc80
RDX: 0000000000010100 RSI: 0000000000000004 RDI: 0000000000000003
RBP: ffffc90000a07b30 R08: 0000000000585870 R09: 0000000000000005
R10: dffffc0000000000 R11: fffff52000140f58 R12: dffffc0000000000
R13: 0000000000000004 R14: 0000000000000003 R15: 1ffff92000140f7a
FS:  00007fbc271f66c0(0000) GS:ffff88812623b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001440 CR3: 000000007bc5e000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 ____bpf_trace_printk kernel/trace/bpf_trace.c:372 [inline]
 bpf_trace_printk+0xdb/0x190 kernel/trace/bpf_trace.c:362
 bpf_prog_b1367f0be6c54012+0x39/0x3f
 bpf_dispatcher_nop_func include/linux/bpf.h:1364 [inline]
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run include/linux/filter.h:728 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
 bpf_trace_run1+0x27f/0x4b0 kernel/trace/bpf_trace.c:2115
 __bpf_trace_rcu_utilization+0xa1/0xf0 include/trace/events/rcu.h:27
 __traceiter_rcu_utilization+0x7a/0xb0 include/trace/events/rcu.h:27
 __do_trace_rcu_utilization include/trace/events/rcu.h:27 [inline]
 trace_rcu_utilization+0x1ad/0x1d0 include/trace/events/rcu.h:27
 rcu_sched_clock_irq+0xd3/0x11b0 kernel/rcu/tree.c:2693
 update_process_times+0x23c/0x2f0 kernel/time/timer.c:2473
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x97/0x130 kernel/kcov.c:351
Code: 54 53 48 8b 54 24 20 65 4c 8b 04 25 08 50 6e 92 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d 59 40 ae 10 <41> 81 e3 00 01 ff 00 74 13 41 81 fb 00 01 00 00 75 d9 41 83 b8 7c
RSP: 0018:ffffc90000a08368 EFLAGS: 00000212
RAX: 0000000000000020 RBX: ffff88801d2c1254 RCX: 0000000000000005
RDX: ffffffff81c3f210 RSI: ffffffff8df93d90 RDI: 0000000000000004
RBP: 0000002fa7f03e41 R08: ffff88802bd6bc80 R09: 000000000000001f
R10: 000000000000001f R11: 0000000000000104 R12: ffff88801d2c1010
R13: 0000000000000004 R14: 000000000004d064 R15: 0000000000000244
 rb_read_data_buffer+0x110/0x580 kernel/trace/ring_buffer.c:1827
 check_buffer+0x28a/0x750 kernel/trace/ring_buffer.c:4394
 __rb_reserve_next+0x592/0xdb0 kernel/trace/ring_buffer.c:4493
 rb_reserve_next_event kernel/trace/ring_buffer.c:4630 [inline]
 ring_buffer_lock_reserve+0xbb5/0x1010 kernel/trace/ring_buffer.c:4689
 __trace_buffer_lock_reserve kernel/trace/trace.c:1081 [inline]
 trace_event_buffer_lock_reserve+0x1d0/0x6f0 kernel/trace/trace.c:2799
 trace_event_buffer_reserve+0x248/0x340 kernel/trace/trace_events.c:672
 do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 trace_event_raw_event_bpf_trace_printk+0x100/0x260 kernel/trace/bpf_trace.h:11
 __traceiter_bpf_trace_printk+0x74/0xc0 kernel/trace/bpf_trace.h:11
 __do_trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 trace_bpf_trace_printk+0x170/0x1d0 kernel/trace/bpf_trace.h:11
 ____bpf_trace_printk kernel/trace/bpf_trace.c:379 [inline]
 bpf_trace_printk+0x11e/0x190 kernel/trace/bpf_trace.c:362
 bpf_prog_b1367f0be6c54012+0x39/0x3f
 bpf_dispatcher_nop_func include/linux/bpf.h:1364 [inline]
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run include/linux/filter.h:728 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2075 [inline]
 bpf_trace_run1+0x27f/0x4b0 kernel/trace/bpf_trace.c:2115
 __bpf_trace_rcu_utilization+0xa1/0xf0 include/trace/events/rcu.h:27
 __traceiter_rcu_utilization+0x7a/0xb0 include/trace/events/rcu.h:27
 __do_trace_rcu_utilization include/trace/events/rcu.h:27 [inline]
 trace_rcu_utilization+0x1ad/0x1d0 include/trace/events/rcu.h:27
 rcu_core+0x1339/0x1770 kernel/rcu/tree.c:2869
 handle_softirqs+0x286/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7256
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 10 00 00 00 74 64 bf 01 00 00 00 e8 6b 17 48 f6 e8 06 ed 7f f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000489f7a0 EFLAGS: 00000286
RAX: 585ad563ef3e5e00 RBX: 0000000000000000 RCX: 585ad563ef3e5e00
RDX: 0000000000000000 RSI: ffffffff8d70df71 RDI: 0000000000000001
RBP: ffffc9000489f850 R08: ffffffff8f7ce077 R09: 1ffffffff1ef9c0e
R10: dffffc0000000000 R11: fffffbfff1ef9c0f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000913ef4
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__rcu_read_unlock+0x7f/0xe0 kernel/rcu/tree_plugin.h:438
Code: 00 75 27 43 0f b6 04 3c 84 c0 75 41 8b 03 3d 00 00 00 40 73 0f 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc cc 90 0f 0b 90 eb eb <e8> 6c 00 00 00 eb d2 89 d9 80 e1 07 80 c1 03 38 c1 7c a5 49 89 fe
RSP: 0018:ffffc9000489f910 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802bd6c104 RCX: 585ad563ef3e5e00
RDX: 0000000000000000 RSI: ffffffff8d8f4a1c RDI: ffff88802bd6bc80
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81b32273
R10: 0000000000000000 R11: 00000000ffffffff R12: 1ffff110057ad820
R13: ffff88802e564000 R14: ffff88802bd6c108 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:899 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
 futex_hash+0x1d0/0x2d0 kernel/futex/core.c:308
 class_hb_constructor kernel/futex/futex.h:240 [inline]
 futex_wait_setup+0xc9/0x590 kernel/futex/waitwake.c:623
 __futex_wait+0x148/0x3d0 kernel/futex/waitwake.c:682
 futex_wait+0x104/0x360 kernel/futex/waitwake.c:715
 do_futex+0x333/0x420 kernel/futex/syscalls.c:130
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc2638f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbc271f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fbc265e5fa8 RCX: 00007fbc2638f6c9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbc265e5fa8
RBP: 00007fbc265e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbc265e6038 R14: 00007ffe7ccd23e0 R15: 00007ffe7ccd24c8
 </TASK>
----------------
Code disassembly (best guess):
   0:	54                   	push   %rsp
   1:	53                   	push   %rbx
   2:	48 8b 54 24 20       	mov    0x20(%rsp),%rdx
   7:	65 4c 8b 04 25 08 50 	mov    %gs:0xffffffff926e5008,%r8
   e:	6e 92
  10:	45 31 c9             	xor    %r9d,%r9d
  13:	eb 08                	jmp    0x1d
  15:	49 ff c1             	inc    %r9
  18:	4c 39 c8             	cmp    %r9,%rax
  1b:	74 77                	je     0x94
  1d:	4e 8b 54 ce 10       	mov    0x10(%rsi,%r9,8),%r10
  22:	65 44 8b 1d 59 40 ae 	mov    %gs:0x10ae4059(%rip),%r11d        # 0x10ae4083
  29:	10
* 2a:	41 81 e3 00 01 ff 00 	and    $0xff0100,%r11d <-- trapping instruction
  31:	74 13                	je     0x46
  33:	41 81 fb 00 01 00 00 	cmp    $0x100,%r11d
  3a:	75 d9                	jne    0x15
  3c:	41                   	rex.B
  3d:	83                   	.byte 0x83
  3e:	b8                   	.byte 0xb8
  3f:	7c                   	.byte 0x7c