unregister_netdevice: waiting for syz7 to become free. Usage count = 1
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 10245 Comm: blkid Not tainted 4.13.0-rc4+ #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801da61e000 task.stack: ffff8801c4d68000
RIP: 0010:create_empty_buffers+0xeb/0x7b0 fs/buffer.c:1581
RSP: 0018:ffff8801c4d6f060 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000010
RDX: 0000000000000000 RSI: 0000000000010000 RDI: ffffea00062c1e50
RBP: ffff8801c4d6f268 R08: 0000000000000001 R09: 1ffff100389addc6
R10: ffff8801c4d6edf8 R11: 0000000000000000 R12: ffffea00062c1e50
R13: 0000000000000000 R14: ffff8801c4d6f240 R15: dffffc0000000000
FS:  00007f765694e740(0000) GS:ffff8801dc000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c43323b000 CR3: 00000001d9b8b000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 create_page_buffers+0x1ed/0x290 fs/buffer.c:1696
 block_read_full_page+0xe9/0x960 fs/buffer.c:2285
 blkdev_readpage+0x1c/0x20 fs/block_dev.c:583
 do_generic_file_read mm/filemap.c:2071 [inline]
 generic_file_read_iter+0x1277/0x26b0 mm/filemap.c:2202
 blkdev_read_iter+0x105/0x170 fs/block_dev.c:1917
 call_read_iter include/linux/fs.h:1737 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 __vfs_read+0x6a7/0xa00 fs/read_write.c:412
 vfs_read+0x11e/0x350 fs/read_write.c:433
 SYSC_read fs/read_write.c:549 [inline]
 SyS_read+0xef/0x220 fs/read_write.c:542
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x7f7656255310
RSP: 002b:00007fffa1878aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7656255310
RDX: 0000000000000400 RSI: 0000000001d77c58 RDI: 0000000000000003
RBP: 0000000000000086 R08: 0000000000000028 R09: 0000000000168000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001d77c30
R13: 000000000001ffb1 R14: 0000000000000000 R15: 0000000000000004
Code: 4c 89 ee ba 01 00 00 00 4c 89 e7 e8 90 e3 ff ff 48 89 85 18 fe ff ff 49 89 c5 eb 03 49 89 c5 e8 ac c8 bb ff 4c 89 e8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 44 06 00 00 49 8d 7d 08 49 09 5d 00 48 89 
RIP: create_empty_buffers+0xeb/0x7b0 fs/buffer.c:1581 RSP: ffff8801c4d6f060
---[ end trace ea8419a24b4d444a ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..