general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 15069 Comm: syz.4.4025 Not tainted 6.1.121-syzkaller-00997-g2f2e115eecbd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:dev_map_enqueue+0x31/0x340 kernel/bpf/devmap.c:532
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 55 c0 49 89 f7 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 36 fd dd ff 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 10 78 25 00 4c 8b 33 48 83 c3 20
RSP: 0018:ffffc90004b5f7a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90003f24000 RSI: 0000000000000069 RDI: 000000000000006a
RBP: ffffc90004b5f7e0 R08: ffffffff8414e18d R09: ffffffff8414e0c2
R10: 0000000000000004 R11: ffff8881094d5100 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88813d608000 R15: ffff88813d608000
FS:  00007f1b3d8666c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001840 CR3: 000000011c5ba000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __xdp_do_redirect_frame net/core/filter.c:4310 [inline]
 xdp_do_redirect+0x5ed/0xc60 net/core/filter.c:4358
 tun_xdp_act+0xdb/0xc00 drivers/net/tun.c:1625
 tun_build_skb drivers/net/tun.c:1715 [inline]
 tun_get_user+0xb35/0x3a90 drivers/net/tun.c:1818
 tun_chr_write_iter+0x129/0x210 drivers/net/tun.c:2044
 call_write_iter include/linux/fs.h:2274 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0xaf6/0xed0 fs/read_write.c:584
 ksys_write+0x199/0x2c0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:646
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1b3c98b7df
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 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 4c 93 02 00 48
RSP: 002b:00007f1b3d866000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1b3cba5fa0 RCX: 00007f1b3c98b7df
RDX: 000000000000003e RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007f1b3ca0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000003e R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1b3cba5fa0 R15: 00007ffd61b50e58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dev_map_enqueue+0x31/0x340 kernel/bpf/devmap.c:532
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 55 c0 49 89 f7 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 36 fd dd ff 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 10 78 25 00 4c 8b 33 48 83 c3 20
RSP: 0018:ffffc90004b5f7a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90003f24000 RSI: 0000000000000069 RDI: 000000000000006a
RBP: ffffc90004b5f7e0 R08: ffffffff8414e18d R09: ffffffff8414e0c2
R10: 0000000000000004 R11: ffff8881094d5100 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88813d608000 R15: ffff88813d608000
FS:  00007f1b3d8666c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001840 CR3: 000000011c5ba000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	56                   	push   %rsi
   1:	41 55                	push   %r13
   3:	41 54                	push   %r12
   5:	53                   	push   %rbx
   6:	48 83 ec 18          	sub    $0x18,%rsp
   a:	48 89 55 c0          	mov    %rdx,-0x40(%rbp)
   e:	49 89 f7             	mov    %rsi,%r15
  11:	48 89 fb             	mov    %rdi,%rbx
  14:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  1b:	fc ff df
  1e:	e8 36 fd dd ff       	call   0xffddfd59
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 10 78 25 00       	call   0x257849
  39:	4c 8b 33             	mov    (%rbx),%r14
  3c:	48 83 c3 20          	add    $0x20,%rbx