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: 10181 Comm: syz-executor.0 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:dev_map_generic_redirect+0x95/0x650 kernel/bpf/devmap.c:681
Code: f1 00 f2 f2 f2 4b 89 44 35 00 43 c7 44 35 0f f3 f3 f3 f3 43 c6 44 35 13 f3 e8 b7 71 d7 ff 48 89 d8 48 c1 e8 03 48 89 44 24 48 <42> 80 3c 30 00 74 08 48 89 df e8 ac 80 3d 00 48 89 5c 24 20 4c 8b
RSP: 0018:ffffc9000314f6a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90009811000 RSI: 0000000000001910 RDI: 0000000000001911
RBP: ffffc9000314f7f0 R08: ffffffff89690ba7 R09: ffffffff89690ac0
R10: 0000000000000004 R11: ffff88801fc61e00 R12: ffff888011661640
R13: 1ffff92000629ee0 R14: dffffc0000000000 R15: 0000000000000019
FS:  00007fe2e79db6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020010000 CR3: 000000001f846000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xdp_do_generic_redirect_map net/core/filter.c:4485 [inline]
 xdp_do_generic_redirect+0x439/0x7a0 net/core/filter.c:4544
 do_xdp_generic+0x882/0xb80 net/core/dev.c:5108
 tun_get_user+0x2801/0x4560 drivers/net/tun.c:1924
 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: 0033:0x7fe2e6c7bcaf
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 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 0c 81 02 00 48
RSP: 002b:00007fe2e79db090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe2e6db3f80 RCX: 00007fe2e6c7bcaf
RDX: 000000000000fdef RSI: 0000000020000340 RDI: 00000000000000c8
RBP: 00007fe2e6cda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe2e6db3f80 R15: 00007ffc27f233d8
 </TASK>
Modules linked in:
----------------
Code disassembly (best guess):
   0:	f1                   	int1
   1:	00 f2                	add    %dh,%dl
   3:	f2 f2 4b 89 44 35 00 	repnz repnz mov %rax,0x0(%r13,%r14,1)
   a:	43 c7 44 35 0f f3 f3 	movl   $0xf3f3f3f3,0xf(%r13,%r14,1)
  11:	f3 f3
  13:	43 c6 44 35 13 f3    	movb   $0xf3,0x13(%r13,%r14,1)
  19:	e8 b7 71 d7 ff       	call   0xffd771d5
  1e:	48 89 d8             	mov    %rbx,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	48 89 44 24 48       	mov    %rax,0x48(%rsp)
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 ac 80 3d 00       	call   0x3d80e5
  39:	48 89 5c 24 20       	mov    %rbx,0x20(%rsp)
  3e:	4c                   	rex.WR
  3f:	8b                   	.byte 0x8b