Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb28e474168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb28f453100 RCX: 00007fb28f340109
RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007fb28f39a05d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc3a3cab2f R14: 00007fb28e474300 R15: 0000000000022000
---[ end trace 256d4b54af0157cc ]---
------------[ cut here ]------------
kernel BUG at include/linux/netdevice.h:518!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 18999 Comm: syz-executor.5 Tainted: G        W         5.10.117-syzkaller-00814-gfdd06dc6b0f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:napi_enable include/linux/netdevice.h:518 [inline]
RIP: 0010:tun_napi_init drivers/net/tun.c:278 [inline]
RIP: 0010:tun_attach+0x14b3/0x14c0 drivers/net/tun.c:818
Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41
RSP: 0018:ffffc90007af7b50 EFLAGS: 00010293
RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff888119914f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90007af7c70 R08: ffffffff82eec175 R09: ffffed1021593086
R10: ffffed1021593086 R11: 1ffff11021593085 R12: ffff88810ac98428
R13: ffff8881161e8980 R14: ffff8881161e8000 R15: dffffc0000000000
FS:  00007fb28e474700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe6dd897a0 CR3: 0000000159187000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tun_set_iff+0xadf/0x1100 drivers/net/tun.c:2803
 __tun_chr_ioctl+0x8ab/0x2130 drivers/net/tun.c:3084
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3360
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb28f340109
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb28e474168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb28f453100 RCX: 00007fb28f340109
RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007fb28f39a05d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc3a3cab2f R14: 00007fb28e474300 R15: 0000000000022000
Modules linked in:
---[ end trace 256d4b54af0157cd ]---
RIP: 0010:napi_enable include/linux/netdevice.h:518 [inline]
RIP: 0010:tun_napi_init drivers/net/tun.c:278 [inline]
RIP: 0010:tun_attach+0x14b3/0x14c0 drivers/net/tun.c:818
Code: 89 df e8 e0 ba b7 fe e9 cf fa ff ff e8 f6 e4 7d fe 48 c7 c7 a0 12 68 86 48 89 de e8 67 7c 7b ff e9 e0 fb ff ff e8 dd e4 7d fe <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41
RSP: 0018:ffffc90007af7b50 EFLAGS: 00010293
RAX: ffffffff82eecd73 RBX: 0000000000000000 RCX: ffff888119914f00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90007af7c70 R08: ffffffff82eec175 R09: ffffed1021593086
R10: ffffed1021593086 R11: 1ffff11021593085 R12: ffff88810ac98428
R13: ffff8881161e8980 R14: ffff8881161e8000 R15: dffffc0000000000
FS:  00007fb28e474700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe6dd897a0 CR3: 0000000159187000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	nopw   %cs:0x0(%rax,%rax,1)
   9:	00 00 00
   c:	0f 1f 40 00          	nopl   0x0(%rax)
  10:	48 89 f8             	mov    %rdi,%rax
  13:	48 89 f7             	mov    %rsi,%rdi
  16:	48 89 d6             	mov    %rdx,%rsi
  19:	48 89 ca             	mov    %rcx,%rdx
  1c:	4d 89 c2             	mov    %r8,%r10
  1f:	4d 89 c8             	mov    %r9,%r8
  22:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  27:	0f 05                	syscall
* 29:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax <-- trapping instruction
  2f:	73 01                	jae    0x32
  31:	c3                   	retq
  32:	48 c7 c1 b8 ff ff ff 	mov    $0xffffffffffffffb8,%rcx
  39:	f7 d8                	neg    %eax
  3b:	64 89 01             	mov    %eax,%fs:(%rcx)
  3e:	48                   	rex.W