------------[ cut here ]------------
kernel BUG at net/core/gro.c:424!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 5775 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller-10320-g3eb3c33c1d87 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:gro_pull_from_frag0 net/core/gro.c:424 [inline]
RIP: 0010:gro_try_pull_from_frag0 net/core/gro.c:446 [inline]
RIP: 0010:dev_gro_receive+0x242f/0x24b0 net/core/gro.c:571
Code: ff d3 66 90 e9 ea fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c f1 f9 ff ff 4c 89 f7 e8 3c 12 91 f8 e9 e4 f9 ff ff e8 02 3b 2b f8 90 <0f> 0b 89 d9 80 e1 07 fe c1 38 c1 0f 8c 19 fa ff ff 48 89 df e8 48
RSP: 0018:ffffc90000007ae8 EFLAGS: 00010246
RAX: ffffffff896af6ee RBX: 00000000000000bc RCX: ffff888029791e00
RDX: 0000000080000101 RSI: 000000000000000a RDI: 0000000000000004
RBP: 0000000000000004 R08: ffffffff896ae95b R09: 1ffffffff1f5a715
R10: dffffc0000000000 R11: fffffbfff1f5a716 R12: 1ffff11004edaf4e
R13: 000000000000000a R14: ffff8880276d7a74 R15: 1ffff11004edaf59
FS:  0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000f5ed3b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f74600c4 CR3: 000000001eeee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 napi_gro_receive+0x3c3/0xc90 net/core/gro.c:639
 gro_cell_poll+0x13c/0x1c0 net/core/gro_cells.c:61
 __napi_poll+0xcb/0x490 net/core/dev.c:6721
 napi_poll net/core/dev.c:6790 [inline]
 net_rx_action+0x7bb/0x10a0 net/core/dev.c:6906
 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 tun_rx_batched+0x732/0x8f0
 tun_get_user+0x2f35/0x4560 drivers/net/tun.c:2002
 tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2048
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb8/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72e1579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5ed3570 EFLAGS: 00000206 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 0000000020000080
RDX: 000000000000007c RSI: 00000000f7438ff4 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gro_pull_from_frag0 net/core/gro.c:424 [inline]
RIP: 0010:gro_try_pull_from_frag0 net/core/gro.c:446 [inline]
RIP: 0010:dev_gro_receive+0x242f/0x24b0 net/core/gro.c:571
Code: ff d3 66 90 e9 ea fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c f1 f9 ff ff 4c 89 f7 e8 3c 12 91 f8 e9 e4 f9 ff ff e8 02 3b 2b f8 90 <0f> 0b 89 d9 80 e1 07 fe c1 38 c1 0f 8c 19 fa ff ff 48 89 df e8 48
RSP: 0018:ffffc90000007ae8 EFLAGS: 00010246
RAX: ffffffff896af6ee RBX: 00000000000000bc RCX: ffff888029791e00
RDX: 0000000080000101 RSI: 000000000000000a RDI: 0000000000000004
RBP: 0000000000000004 R08: ffffffff896ae95b R09: 1ffffffff1f5a715
R10: dffffc0000000000 R11: fffffbfff1f5a716 R12: 1ffff11004edaf4e
R13: 000000000000000a R14: ffff8880276d7a74 R15: 1ffff11004edaf59
FS:  0000000000000000(0000) GS:ffff8880b9400000(0063) knlGS:00000000f5ed3b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f74600c4 CR3: 000000001eeee000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	90                   	nop
  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