WARNING: CPU: 0 PID: 26747 at net/core/filter.c:4121 ____bpf_xdp_adjust_tail net/core/filter.c:4121 [inline]
WARNING: CPU: 0 PID: 26747 at net/core/filter.c:4121 bpf_xdp_adjust_tail+0x46b/0x9f0 net/core/filter.c:4103
Modules linked in:
CPU: 0 PID: 26747 Comm: syz-executor.2 Not tainted 6.4.0-syzkaller-12454-g1c7873e33645 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:____bpf_xdp_adjust_tail net/core/filter.c:4121 [inline]
RIP: 0010:bpf_xdp_adjust_tail+0x46b/0x9f0 net/core/filter.c:4103
Code: ff 89 de e8 07 7d 5f f9 84 db 0f 85 4f fd ff ff e8 1a 81 5f f9 89 ee 48 c7 c7 40 d5 80 8b c6 05 c9 3f 6f 06 01 e8 f5 d4 26 f9 <0f> 0b e9 2e fd ff ff e8 89 b6 b2 f9 e9 e9 fb ff ff e8 7f b6 b2 f9
RSP: 0018:ffffc9002a2078d8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900063f9000
RDX: 0000000000040000 RSI: ffffffff814c3707 RDI: 0000000000000001
RBP: 0000000000004000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea
R13: ffff888057848f81 R14: 0000000000000000 R15: ffffc9002a207a90
FS:  0000000000000000(0000) GS:ffff88802c600000(0063) knlGS:00000000f7f8cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020002000 CR3: 000000006b25e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bpf_prog_4add87e5301a4105+0x1a/0x1c
 __bpf_prog_run include/linux/filter.h:600 [inline]
 bpf_prog_run_xdp include/linux/filter.h:775 [inline]
 bpf_prog_run_generic_xdp+0x578/0x1210 net/core/dev.c:4721
 netif_receive_generic_xdp+0x2e8/0x7d0 net/core/dev.c:4807
 do_xdp_generic net/core/dev.c:4866 [inline]
 do_xdp_generic+0x9a/0x1b0 net/core/dev.c:4859
 tun_get_user+0x1bf3/0x3b30 drivers/net/tun.c:1919
 tun_chr_write_iter+0xe5/0x200 drivers/net/tun.c:2043
 call_write_iter include/linux/fs.h:1871 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x981/0xda0 fs/read_write.c:584
 ksys_write+0x122/0x250 fs/read_write.c:637
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82
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:00000000f7f8c590 EFLAGS: 00000282 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 00000000000000c8 RCX: 0000000020001180
RDX: 0000000000000e81 RSI: 00000000f734e000 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                   	retq
  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