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: 32326 Comm: syz-executor4 Not tainted 4.13.0-next-20170913+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff88004e23c240 task.stack: ffff88004f260000
RIP: 0010:perf_trace_block_get_rq+0x697/0x970 include/trace/events/block.h:384
RSP: 0018:ffff88004f2673f0 EFLAGS: 00010246
RAX: 0000000000010000 RBX: 1ffff10009e4ce84 RCX: 1ffffd1ffa14657e
RDX: dffffc0000000001 RSI: ffffffff822c4a4f RDI: ffffe8ffd0a32bf0
RBP: ffff88004f267530 R08: 1ffff10007d83e6c R09: ffffe8ffd0a32c1c
R10: 0000000000000002 R11: fffff91ffa146584 R12: ffffe8ffd0a2a9e0
R13: ffffe8ffd0a32be8 R14: ffffffff85caf240 R15: 0000000000000000
FS:  00007fd0ce227700(0000) GS:ffff88003ec00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000004 CR3: 000000006ac87000 CR4: 00000000000026f0
Call Trace:
 trace_block_getrq include/trace/events/block.h:423 [inline]
 __get_request block/blk-core.c:1283 [inline]
 get_request+0x1518/0x23b0 block/blk-core.c:1355
 blk_old_get_request block/blk-core.c:1402 [inline]
 blk_get_request+0x1d8/0x3c0 block/blk-core.c:1427
 sg_scsi_ioctl+0x117/0x750 block/scsi_ioctl.c:451
 sg_ioctl+0x192d/0x2ed0 drivers/scsi/sg.c:1070
 vfs_ioctl fs/ioctl.c:45 [inline]
 do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685
 SYSC_ioctl fs/ioctl.c:700 [inline]
 SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x447299
RSP: 002b:00007fd0ce226c08 EFLAGS: 00000296 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000017 RCX: 0000000000447299
RDX: 0000000020001000 RSI: 0000000100000001 RDI: 0000000000000017
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 00000000ffffffff
R13: 00000000000058b0 R14: 00000000006e8970 R15: 0000000000000000
Code: df 48 89 f9 48 c1 e9 03 0f b6 14 11 84 d2 74 09 80 fa 03 0f 8e e1 02 00 00 48 ba 01 00 00 00 00 fc ff df 41 c7 45 08 00 00 00 00 <80> 3a 00 0f 85 b7 02 00 00 4c 8b 3c 25 08 00 00 00 48 ba 00 00 
RIP: perf_trace_block_get_rq+0x697/0x970 include/trace/events/block.h:384 RSP: ffff88004f2673f0
---[ end trace 785c3b4177a2c31d ]---
Kernel panic - not syncing: Fatal exception
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..