------------[ cut here ]------------
WARNING: CPU: 0 PID: 1220 at lib/list_debug.c:36 __list_add+0x169/0x1c0 lib/list_debug.c:34()
list_add double add: new=ffff8800b948e358, prev=ffffffff844ee460, next=ffff8800b948e358.
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 1220 Comm: syz-executor0 Not tainted 4.4.146-g1396226 #79
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 bb6fdb7d1e720f6b ffff8801c525f948 ffffffff81e1292d
 ffffffff83a44d40 ffff8800ba478000 ffffffff83c154c0 0000000000000009
 0000000000000024 ffff8801c525fa08 ffffffff8140c644 0000000041b58ab3
Call Trace:
 [<ffffffff81e1292d>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81e1292d>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff8140c644>] panic+0x19e/0x38d kernel/panic.c:112
 [<ffffffff8140c868>] warn_slowpath_common.cold.6+0x20/0x20 kernel/panic.c:455
 [<ffffffff811321ef>] warn_slowpath_fmt+0xbf/0x100 kernel/panic.c:471
 [<ffffffff81e72739>] __list_add+0x169/0x1c0 lib/list_debug.c:34
 [<ffffffff813a3e9c>] list_add include/linux/list.h:63 [inline]
 [<ffffffff813a3e9c>] blk_trace_startstop+0x24c/0x340 kernel/trace/blktrace.c:626
 [<ffffffff826b7808>] sg_ioctl+0x1198/0x2930 drivers/scsi/sg.c:1145
 [<ffffffff8155c1ef>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff8155c1ef>] file_ioctl fs/ioctl.c:470 [inline]
 [<ffffffff8155c1ef>] do_vfs_ioctl+0x63f/0xf40 fs/ioctl.c:605
 [<ffffffff8155cb7f>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff8155cb7f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:613
 [<ffffffff838c8a25>] entry_SYSCALL_64_fastpath+0x22/0x9e
Shutting down cpus with NMI
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..