BUG: unable to handle page fault for address: ffffed104db954de
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff6067 P4D 23fff6067 PUD 14fffc067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6012 Comm: syz.0.82 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:qdisc_pkt_len_segs_init+0x343/0xa30
Code: 30 45 89 e6 42 80 3c 2b 00 48 8b 5c 24 70 74 08 48 89 df e8 0f a8 b3 f8 48 8b 03 4a 8d 1c 30 48 83 c3 0c 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 91 04 00 00 44 8b 3b 41 c1 ef 02 41 83
RSP: 0018:ffffc90000a085d0 EFLAGS: 00010a07
RAX: 1ffff1104db954de RBX: ffff88826dcaa6f4 RCX: ffff88810b318000
RDX: 0000000000000100 RSI: 0000000000000014 RDI: 0000000000000010
RBP: ffff8881b8b73b00 R08: ffffc90000a0885f R09: 0000000000000000
R10: ffffc90000a087f0 R11: fffff5200014110c R12: fffffffffffffffc
R13: dffffc0000000000 R14: 00000000fffffffc R15: 00000000fffffffc
FS:  00007fda53c8d6c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed104db954de CR3: 00000001b99c6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __netif_receive_skb_core+0x13bd/0x3170
 __netif_receive_skb_list_core+0x24d/0x810
 netif_receive_skb_list_internal+0x995/0xcf0
 napi_complete_done+0x299/0x730
 gro_cell_poll+0x5a9/0x5d0
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 tun_rx_batched+0x617/0x790
 tun_get_user+0x2bbc/0x43e0
 tun_chr_write_iter+0x113/0x200
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda52d9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fda53c8d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fda53015fa0 RCX: 00007fda52d9cdd9
RDX: 000000000000fdef RSI: 0000200000000440 RDI: 0000000000000003
RBP: 00007fda52e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fda53016038 R14: 00007fda53015fa0 R15: 00007ffd409119f8
 </TASK>
Modules linked in:
CR2: ffffed104db954de
---[ end trace 0000000000000000 ]---
RIP: 0010:qdisc_pkt_len_segs_init+0x343/0xa30
Code: 30 45 89 e6 42 80 3c 2b 00 48 8b 5c 24 70 74 08 48 89 df e8 0f a8 b3 f8 48 8b 03 4a 8d 1c 30 48 83 c3 0c 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 91 04 00 00 44 8b 3b 41 c1 ef 02 41 83
RSP: 0018:ffffc90000a085d0 EFLAGS: 00010a07
RAX: 1ffff1104db954de RBX: ffff88826dcaa6f4 RCX: ffff88810b318000
RDX: 0000000000000100 RSI: 0000000000000014 RDI: 0000000000000010
RBP: ffff8881b8b73b00 R08: ffffc90000a0885f R09: 0000000000000000
R10: ffffc90000a087f0 R11: fffff5200014110c R12: fffffffffffffffc
R13: dffffc0000000000 R14: 00000000fffffffc R15: 00000000fffffffc
FS:  00007fda53c8d6c0(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed104db954de CR3: 00000001b99c6000 CR4: 00000000000006f0
