BUG: unable to handle kernel paging request at ffffff0100008000 IP: kfree_skb_list net/core/skbuff.c:670 [inline] IP: skb_release_data+0x3c2/0x790 net/core/skbuff.c:571 PGD 644b067 P4D 644b067 PUD 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 2 PID: 3094 Comm: syz-executor0 Not tainted 4.13.0-rc5-next-20170815+ #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 task: ffff88003bb52000 task.stack: ffff88003d238000 RIP: 0010:kfree_skb_list net/core/skbuff.c:670 [inline] RIP: 0010:skb_release_data+0x3c2/0x790 net/core/skbuff.c:571 RSP: 0018:ffff88003d23eda8 EFLAGS: 00010246 RAX: 1fffffe020001000 RBX: 0000000000000020 RCX: 1ffff10007a47de4 RDX: 0000000000000000 RSI: 1ffff1000d4a278f RDI: ffff880068ca0188 RBP: ffff88003d23eec8 R08: ffff88006a513cc8 R09: 0000000000000000 R10: ffff88003d23f6b0 R11: 0000000000000007 R12: dffffc0000000000 R13: ffffff0100008000 R14: ffff88006a513c00 R15: 0000000000000000 FS: 00007ff58bbd6700(0000) GS:ffff88006de00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffff0100008000 CR3: 0000000038ae0000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all+0x4a/0x60 net/core/skbuff.c:631 __kfree_skb net/core/skbuff.c:645 [inline] kfree_skb+0x15d/0x4c0 net/core/skbuff.c:663 ip_rcv+0x40a/0x17d0 net/ipv4/ip_input.c:497 __netif_receive_skb_core+0x19af/0x33d0 net/core/dev.c:4418 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4456 netif_receive_skb_internal+0x10b/0x5e0 net/core/dev.c:4527 netif_receive_skb+0xae/0x390 net/core/dev.c:4551 tun_rx_batched.isra.43+0x5e7/0x860 drivers/net/tun.c:1221 tun_get_user+0x11dd/0x2150 drivers/net/tun.c:1542 tun_chr_write_iter+0xd8/0x190 drivers/net/tun.c:1568 call_write_iter include/linux/fs.h:1742 [inline] new_sync_write fs/read_write.c:457 [inline] __vfs_write+0x684/0x970 fs/read_write.c:470 vfs_write+0x189/0x510 fs/read_write.c:518 SYSC_write fs/read_write.c:565 [inline] SyS_write+0xef/0x220 fs/read_write.c:557 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x40bab1 RSP: 002b:00007ff58bbd5c00 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000036 RCX: 000000000040bab1 RDX: 0000000000000036 RSI: 0000000020002000 RDI: 0000000000000003 RBP: 0000000000708000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff58bbd69c0 R15: 00007ff58bbd6700 Code: ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 68 08 4d 85 ed 74 2b e8 60 77 8d fd 4c 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 97 03 00 00 <49> 8b 5d 00 4c 89 ef e8 42 cf ff ff 48 85 db 49 89 dd 75 d5 e8 RIP: kfree_skb_list net/core/skbuff.c:670 [inline] RSP: ffff88003d23eda8 RIP: skb_release_data+0x3c2/0x790 net/core/skbuff.c:571 RSP: ffff88003d23eda8 CR2: ffffff0100008000 ---[ end trace 6c135ff2cec1880d ]---