------------[ cut here ]------------
WARNING: CPU: 1 PID: 14359 at net/hsr/hsr_forward.c:602 handle_std_frame+0x247/0x2c0 net/hsr/hsr_forward.c:602
Modules linked in:
CPU: 1 UID: 0 PID: 14359 Comm: syz.2.3496 Not tainted 6.11.0-rc6-syzkaller-00183-gb831f83e40a2 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:handle_std_frame+0x247/0x2c0 net/hsr/hsr_forward.c:602
Code: 49 8d bd b0 01 00 00 be ff ff ff ff e8 02 56 25 00 31 ff 89 c5 89 c6 e8 e7 50 a8 f6 85 ed 0f 85 5a ff ff ff e8 9a 4e a8 f6 90 <0f> 0b 90 e9 4c ff ff ff e8 6c e3 06 f7 e9 8f fe ff ff e8 f2 e3 06
RSP: 0018:ffffc90000598598 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffc90000598670 RCX: ffffffff8ae2cb79
RDX: ffff88802662c880 RSI: ffffffff8ae2cb86 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000003
R13: ffff888011978cc0 R14: 0000000000000000 R15: ffff88802ab56fba
FS:  0000000000000000(0000) GS:ffff88802b700000(0063) knlGS:00000000f5726b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020010000 CR3: 0000000062b32000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hsr_fill_frame_info+0x2c8/0x360 net/hsr/hsr_forward.c:630
 fill_frame_info net/hsr/hsr_forward.c:700 [inline]
 hsr_forward_skb+0x7df/0x25c0 net/hsr/hsr_forward.c:715
 hsr_handle_frame+0x603/0x850 net/hsr/hsr_slave.c:70
 __netif_receive_skb_core.constprop.0+0xa3d/0x4330 net/core/dev.c:5555
 __netif_receive_skb_list_core+0x357/0x950 net/core/dev.c:5737
 __netif_receive_skb_list net/core/dev.c:5804 [inline]
 netif_receive_skb_list_internal+0x753/0xda0 net/core/dev.c:5896
 gro_normal_list include/net/gro.h:515 [inline]
 gro_normal_list include/net/gro.h:511 [inline]
 napi_complete_done+0x23f/0x9a0 net/core/dev.c:6247
 gro_cell_poll+0x162/0x210 net/core/gro_cells.c:66
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0xa92/0x1010 net/core/dev.c:6963
 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
 do_softirq kernel/softirq.c:455 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:442
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 tun_get_user+0x2c10/0x3c20 drivers/net/tun.c:1978
 tun_chr_write_iter+0xe8/0x210 drivers/net/tun.c:2052
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x6b6/0x1140 fs/read_write.c:590
 ksys_write+0x12f/0x260 fs/read_write.c:643
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f91579
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 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f572656c EFLAGS: 00000296 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000440
RDX: 000000000000fdef RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
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:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi