RBP: 00007f0e44d5f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffedaf8998f R14: 00007f0e44d5f300 R15: 0000000000022000
 </TASK>
------------[ cut here ]------------
WARNING: kernel/printk/printk_ringbuffer.c:1278 at get_data+0x364/0x400, CPU#1: syz-executor.5/50934
Modules linked in:
CPU: 1 UID: 0 PID: 50934 Comm: syz-executor.5 Not tainted 6.18.0-rc3-next-20251028 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:get_data+0x364/0x400
Code: e8 83 e0 07 83 c0 03 38 d0 0f 8c be fe ff ff 84 d2 0f 84 b6 fe ff ff 48 89 ef e8 47 95 5b 00 e9 a9 fe ff ff e8 3d bb 1e 00 90 <0f> 0b 90 45 31 e4 e9 3b ff ff ff e8 2c bb 1e 00 90 0f 0b 90 45 31
RSP: 0018:ffff88806cf08720 EFLAGS: 00010046
RAX: 0000000000010000 RBX: ffff88806cf08838 RCX: ffffffff81555756
RDX: ffff88804e298000 RSI: ffffffff81555923 RDI: 0000000000000006
RBP: ffff88806cf08800 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff85d30650
R13: 00003fffffffffff R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0e44d5f700(0000) GS:ffff8880e54f4000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 000000004db30000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 _prb_read_valid+0x2f3/0x830
 prb_read_valid+0x78/0xa0
 printk_get_next_message+0x10b/0x570
 console_flush_one_record+0x64f/0xb20
 __console_flush_and_unlock+0xb1/0x1d0
 wake_up_klogd_work_func+0x17c/0x1e0
 irq_work_single+0x128/0x260
 irq_work_run_list+0x91/0xc0
 update_process_times+0x12f/0x210
 tick_nohz_handler+0x414/0x6d0
 __hrtimer_run_queues+0x60f/0xac0
 hrtimer_interrupt+0x369/0x830
 __sysvec_apic_timer_interrupt+0xbb/0x330
 sysvec_apic_timer_interrupt+0x6b/0x80
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:dump_stack_lvl+0x115/0x120
Code: fc ff ff 4c 89 e2 31 f6 31 ff e8 86 87 72 fc e8 91 80 9c fc 48 89 ee 31 ff e8 c7 51 bc fc e8 62 56 bc fc e8 0d b3 c4 fc fb 5b <5d> 41 5c e9 53 56 bc fc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffff88800f0778a0 EFLAGS: 00000206
RAX: 0000000000000111 RBX: ffffffff8609f300 RCX: ffffffff817c7026
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84b7be03
RBP: 0000000000000200 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff86646857 R11: 0000000000000001 R12: ffffffff855192e0
R13: ffffffff8609f310 R14: 0000000000000000 R15: 0000000000000000
 should_fail_ex+0x4d7/0x5e0
 _copy_from_iter+0x1dc/0x1660
 copy_page_from_iter+0xe3/0x180
 skb_copy_datagram_from_iter+0x3a7/0x710
 tun_get_user+0x1634/0x39e0
 tun_chr_write_iter+0xd9/0x1e0
 vfs_write+0xbe9/0x1150
 ksys_write+0x121/0x240
 do_syscall_64+0xbf/0x390
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0e4779c5ff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 cc fd ff ff 48
RSP: 002b:00007f0e44d5f150 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0e478fcf60 RCX: 00007f0e4779c5ff
RDX: 000000000000fdef RSI: 0000000020000280 RDI: 00000000000000f0
RBP: 00007f0e44d5f1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffedaf8998f R14: 00007f0e44d5f300 R15: 0000000000022000
 </TASK>
irq event stamp: 274
hardirqs last  enabled at (273): [<ffffffff84b7be03>] dump_stack_lvl+0x113/0x120
hardirqs last disabled at (274): [<ffffffff84c4d4df>] sysvec_apic_timer_interrupt+0xf/0x80
softirqs last  enabled at (164): [<ffffffff813bc26c>] handle_softirqs+0x50c/0x770
softirqs last disabled at (103): [<ffffffff813bc604>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 4c 89 e2          	decl   -0x1e(%rcx,%rcx,4)
   4:	31 f6                	xor    %esi,%esi
   6:	31 ff                	xor    %edi,%edi
   8:	e8 86 87 72 fc       	callq  0xfc728793
   d:	e8 91 80 9c fc       	callq  0xfc9c80a3
  12:	48 89 ee             	mov    %rbp,%rsi
  15:	31 ff                	xor    %edi,%edi
  17:	e8 c7 51 bc fc       	callq  0xfcbc51e3
  1c:	e8 62 56 bc fc       	callq  0xfcbc5683
  21:	e8 0d b3 c4 fc       	callq  0xfcc4b333
  26:	fb                   	sti
  27:	5b                   	pop    %rbx
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	41 5c                	pop    %r12
  2b:	e9 53 56 bc fc       	jmpq   0xfcbc5683
  30:	0f 1f 00             	nopl   (%rax)
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop