------------[ cut here ]------------
WARNING: CPU: 1 PID: 8789 at kernel/bpf/helpers.c:712 try_get_fmt_tmp_buf kernel/bpf/helpers.c:712 [inline]
WARNING: CPU: 1 PID: 8789 at kernel/bpf/helpers.c:712 bpf_bprintf_prepare+0xeba/0x10b0 kernel/bpf/helpers.c:760
Modules linked in:
CPU: 1 PID: 8789 Comm: syz-executor.5 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:try_get_fmt_tmp_buf kernel/bpf/helpers.c:712 [inline]
RIP: 0010:bpf_bprintf_prepare+0xeba/0x10b0 kernel/bpf/helpers.c:760
Code: c6 e8 6a ce 63 02 83 c0 01 48 98 48 01 c5 48 89 6c 24 08 e8 58 cc ec ff 8d 6b 02 83 44 24 10 01 e9 d6 f5 ff ff e8 46 cc ec ff <0f> 0b 65 ff 0d cd 08 7b 7e bf 01 00 00 00 41 bc f0 ff ff ff e8 1d
RSP: 0018:ffffc90000dc0348 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000100
RDX: ffff888065339c40 RSI: ffffffff8187f66a RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8187f204 R11: 0000000000000000 R12: ffffc90000dc0478
R13: 0000000000000100 R14: ffffc90000dc0530 R15: 0000000000000003
FS:  00000000033bd400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c625000 CR3: 00000000654b7000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ____bpf_trace_printk kernel/trace/bpf_trace.c:389 [inline]
 bpf_trace_printk+0xab/0x3a0 kernel/trace/bpf_trace.c:380
 bpf_prog_0605f9f479290f07+0x2f/0x13c
 bpf_dispatcher_nop_func include/linux/bpf.h:687 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1788 [inline]
 bpf_trace_run2+0x12f/0x390 kernel/trace/bpf_trace.c:1825
 __bpf_trace_net_dev_start_xmit+0xb1/0xe0 include/trace/events/tcp.h:238
 trace_net_dev_start_xmit include/trace/events/net.h:14 [inline]
 xmit_one net/core/dev.c:3653 [inline]
 dev_hard_start_xmit+0x57b/0x920 net/core/dev.c:3670
 __dev_queue_xmit+0x209c/0x2e30 net/core/dev.c:4245
 neigh_hh_output include/net/neighbour.h:499 [inline]
 neigh_output include/net/neighbour.h:508 [inline]
 ip_finish_output2+0xeec/0x21f0 net/ipv4/ip_output.c:230
 __ip_finish_output net/ipv4/ip_output.c:308 [inline]
 __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290
 ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x196/0x310 net/ipv4/ip_output.c:432
 dst_output include/net/dst.h:448 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 __ip_queue_xmit+0x905/0x1a20 net/ipv4/ip_output.c:533
 __tcp_transmit_skb+0x1889/0x38f0 net/ipv4/tcp_output.c:1405
 __tcp_send_ack.part.0+0x3d6/0x7a0 net/ipv4/tcp_output.c:3970
 __tcp_send_ack net/ipv4/tcp_output.c:3976 [inline]
 tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3976
 tcp_delack_timer_handler+0x4e4/0x6e0 net/ipv4/tcp_timer.c:317
 tcp_delack_timer+0xa2/0x320 net/ipv4/tcp_timer.c:344
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1745
 __run_timers kernel/time/timer.c:1726 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1758
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191
Code: 74 24 10 e8 9a 17 41 f8 48 89 ef e8 32 90 41 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> 63 98 35 f8 65 8b 05 7c a1 e8 76 85 c0 74 0a 5b 5d c3 e8 10 81
RSP: 0018:ffffc900022a7d80 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1b92621
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000001
RBP: ffffffff8bff5c80 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817acf98 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000293 R14: 1ffff920001e3606 R15: 0000000000000003
 ____bpf_trace_printk kernel/trace/bpf_trace.c:398 [inline]
 bpf_trace_printk+0x172/0x3a0 kernel/trace/bpf_trace.c:380