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: 0 PID: 324 Comm: syz-executor.4 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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 97 cb 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 8c a6 3c 00 48 89 5c 24 20 4c 8b
RSP: 0018:ffffc90002f276c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000c273000 RSI: 00000000000018bb RDI: 00000000000018bc
RBP: ffffc90002f27808 R08: 0000000000000005 R09: ffffffff895da4fd
R10: 0000000000000004 R11: ffff88801bb8bc00 R12: ffff8880719dd280
R13: 1ffff920005e4ee4 R14: dffffc0000000000 R15: 000000000000032a
FS:  00007f26b99ff6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000076698000 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:4466 [inline]
 xdp_do_generic_redirect+0x446/0x750 net/core/filter.c:4523
 do_xdp_generic+0x882/0xb80 net/core/dev.c:5086
 tun_get_user+0x27f2/0x4540 drivers/net/tun.c:1924
 tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2048
 call_write_iter include/linux/fs.h:2112 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa2d/0xc50 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f26ba67cb2f
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:00007f26b99ff090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f26ba7abf80 RCX: 00007f26ba67cb2f
RDX: 000000000000fdef RSI: 0000000020000040 RDI: 00000000000000c8
RBP: 00007f26ba6ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f26ba7abf80 R15: 00007ffc95a7c198
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
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 97 cb 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 8c a6 3c 00 48 89 5c 24 20 4c 8b
RSP: 0018:ffffc90002f276c0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000c273000 RSI: 00000000000018bb RDI: 00000000000018bc
RBP: ffffc90002f27808 R08: 0000000000000005 R09: ffffffff895da4fd
R10: 0000000000000004 R11: ffff88801bb8bc00 R12: ffff8880719dd280
R13: 1ffff920005e4ee4 R14: dffffc0000000000 R15: 000000000000032a
FS:  00007f26b99ff6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 0000000076698000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 97 cb d7 ff       	call   0xffd7cbb5
  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 8c a6 3c 00       	call   0x3ca6c5
  39:	48 89 5c 24 20       	mov    %rbx,0x20(%rsp)
  3e:	4c                   	rex.WR
  3f:	8b                   	.byte 0x8b