general protection fault, probably for non-canonical address 0xdffffc00000000cd: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000668-0x000000000000066f]
CPU: 0 PID: 10813 Comm: syz-executor.3 Not tainted 5.18.0-rc2-syzkaller-00937-gedf45f007a31 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:ip6_rcv_core+0x12e8/0x1dd0 net/ipv6/ip6_input.c:169
Code: c1 ea 03 80 3c 02 00 0f 85 39 09 00 00 4c 89 f2 49 8b 85 b0 02 00 00 48 c1 ea 03 65 48 ff 40 68 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6
RSP: 0018:ffffc90006ef77b0 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900049c2000
RDX: 00000000000000cd RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffff88801a992c80 R08: 0000000000000001 R09: ffff88801a992d5f
R10: ffffffff87fa0f3e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88804e65d280 R14: 000000000000066c R15: dffffc0000000000
FS:  00007f209870d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f209779c028 CR3: 0000000073389000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ipv6_rcv+0x75/0x3b0 net/ipv6/ip6_input.c:303
 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5408
 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5522
 netif_receive_skb_internal net/core/dev.c:5608 [inline]
 netif_receive_skb+0x13e/0x8e0 net/core/dev.c:5667
 tun_rx_batched.isra.0+0x460/0x720 drivers/net/tun.c:1534
 tun_get_user+0x28b7/0x3e30 drivers/net/tun.c:1985
 tun_chr_write_iter+0xdb/0x200 drivers/net/tun.c:2015
 call_write_iter include/linux/fs.h:2050 [inline]
 new_sync_write+0x38a/0x560 fs/read_write.c:504
 vfs_write+0x7c0/0xac0 fs/read_write.c:591
 ksys_write+0x127/0x250 fs/read_write.c:644
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f209763bbff
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 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 cc fd ff ff 48
RSP: 002b:00007f209870d130 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f209779bf60 RCX: 00007f209763bbff
RDX: 000000000000004e RSI: 0000000020000280 RDI: 00000000000000c8
RBP: 00007f20976e308d R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000004e R11: 0000000000000293 R12: 0000000000000000
R13: 00007ffea6766a4f R14: 00007f209870d300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip6_rcv_core+0x12e8/0x1dd0 net/ipv6/ip6_input.c:169
Code: c1 ea 03 80 3c 02 00 0f 85 39 09 00 00 4c 89 f2 49 8b 85 b0 02 00 00 48 c1 ea 03 65 48 ff 40 68 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f6
RSP: 0018:ffffc90006ef77b0 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc900049c2000
RDX: 00000000000000cd RSI: 0000000000000200 RDI: 0000000000000000
RBP: ffff88801a992c80 R08: 0000000000000001 R09: ffff88801a992d5f
R10: ffffffff87fa0f3e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88804e65d280 R14: 000000000000066c R15: dffffc0000000000
FS:  00007f209870d700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f209779c028 CR3: 0000000073389000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 39 09 00 00    	jne    0x946
   d:	4c 89 f2             	mov    %r14,%rdx
  10:	49 8b 85 b0 02 00 00 	mov    0x2b0(%r13),%rax
  17:	48 c1 ea 03          	shr    $0x3,%rdx
  1b:	65 48 ff 40 68       	incq   %gs:0x68(%rax)
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	4c 89 f0             	mov    %r14,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85 f6                	test   %esi,%esi