Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 23636 Comm: syz.2.6681 Not tainted 6.10.0-rc6-syzkaller-00048-g73e931504f8e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:dev_map_enqueue+0x31/0x3e0 kernel/bpf/devmap.c:539
Code: 41 56 41 55 41 54 53 48 83 ec 18 49 89 d4 49 89 f5 48 89 fd 49 be 00 00 00 00 00 fc ff df e8 f6 a0 d7 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 d0 0c 3a 00 4c 8b 7d 00 48 83 c5
RSP: 0018:ffffc900032377d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000019 RCX: 0000000000040000
RDX: ffffc9001681a000 RSI: 00000000000001b4 RDI: 00000000000001b5
RBP: 0000000000000000 R08: ffffffff8958de29 R09: ffffffff8958dded
R10: 0000000000000004 R11: ffff888021ab8000 R12: ffff888071280000
R13: ffff88805d918000 R14: dffffc0000000000 R15: ffff8880b953c698
FS:  00007f3a9dfde6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a9dfddfa8 CR3: 000000007c7e0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __xdp_do_redirect_frame net/core/filter.c:4402 [inline]
 xdp_do_redirect+0x60a/0xb50 net/core/filter.c:4442
 tun_xdp_act+0xe9/0xb70 drivers/net/tun.c:1626
 tun_build_skb drivers/net/tun.c:1716 [inline]
 tun_get_user+0x3467/0x4560 drivers/net/tun.c:1819
 tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2048
 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_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a9e57471f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 8c 02 00 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 7c 8c 02 00 48
RSP: 002b:00007f3a9dfde010 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3a9e704078 RCX: 00007f3a9e57471f
RDX: 000000000000000e RSI: 0000000020001540 RDI: 00000000000000c8
RBP: 00007f3a9e5f677e R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3a9e704078 R15: 00007ffe71774568
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dev_map_enqueue+0x31/0x3e0 kernel/bpf/devmap.c:539
Code: 41 56 41 55 41 54 53 48 83 ec 18 49 89 d4 49 89 f5 48 89 fd 49 be 00 00 00 00 00 fc ff df e8 f6 a0 d7 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 d0 0c 3a 00 4c 8b 7d 00 48 83 c5
RSP: 0018:ffffc900032377d8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000019 RCX: 0000000000040000
RDX: ffffc9001681a000 RSI: 00000000000001b4 RDI: 00000000000001b5
RBP: 0000000000000000 R08: ffffffff8958de29 R09: ffffffff8958dded
R10: 0000000000000004 R11: ffff888021ab8000 R12: ffff888071280000
R13: ffff88805d918000 R14: dffffc0000000000 R15: ffff8880b953c698
FS:  00007f3a9dfde6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a9dfddfa8 CR3: 000000007c7e0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	41 56                	push   %r14
   2:	41 55                	push   %r13
   4:	41 54                	push   %r12
   6:	53                   	push   %rbx
   7:	48 83 ec 18          	sub    $0x18,%rsp
   b:	49 89 d4             	mov    %rdx,%r12
   e:	49 89 f5             	mov    %rsi,%r13
  11:	48 89 fd             	mov    %rdi,%rbp
  14:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  1b:	fc ff df
  1e:	e8 f6 a0 d7 ff       	call   0xffd7a119
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 ef             	mov    %rbp,%rdi
  34:	e8 d0 0c 3a 00       	call   0x3a0d09
  39:	4c 8b 7d 00          	mov    0x0(%rbp),%r15
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c5                   	.byte 0xc5