------------[ cut here ]------------
WARNING: CPU: 1 PID: 31672 at kernel/tracepoint.c:188 tracepoint_add_func kernel/tracepoint.c:188 [inline]()
WARNING: CPU: 1 PID: 31672 at kernel/tracepoint.c:188 tracepoint_probe_register+0xc7/0x250 kernel/tracepoint.c:258()
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 31672 Comm: syz-executor1 Not tainted 4.1.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
 ffffffff82e2b4b8 ffff88006f99bb98 ffffffff8260f242 0000000000000032
 ffffffff82e252bb ffff88006f99bc18 ffffffff8260b0d5 ffff88006f99bbb8
 ffffffff00000008 ffff88006f99bc28 ffff88006f99bbc8 ffff88006f99bc68
Call Trace:
 [<ffffffff8260f242>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff8260f242>] dump_stack+0x4f/0x7b lib/dump_stack.c:50
 [<ffffffff8260b0d5>] panic+0xcd/0x211 kernel/panic.c:111
 [<ffffffff8116daeb>] warn_slowpath_common+0xbb/0xc0 kernel/panic.c:442
 [<ffffffff8116db95>] warn_slowpath_null+0x15/0x20 kernel/panic.c:479
 [<ffffffff8123c1c7>] tracepoint_add_func kernel/tracepoint.c:188 [inline]
 [<ffffffff8123c1c7>] tracepoint_probe_register+0xc7/0x250 kernel/tracepoint.c:258
kobject: 'queue': free name
kobject: 'loop0': free name
kobject: 'queue': free name
kobject: 'loop0': free name
kobject: 'loop4' (ffff88007aa548a0): kobject_uevent_env
kobject: 'loop4' (ffff88007aa548a0): fill_kobj_path: path = '/devices/virtual/block/loop4'
 [<ffffffff8124ed09>] register_trace_block_rq_abort include/trace/events/block.h:108 [inline]
 [<ffffffff8124ed09>] blk_register_tracepoints+0x19/0x400 kernel/trace/blktrace.c:995
 [<ffffffff8125112e>] do_blk_trace_setup+0x2ce/0x300 kernel/trace/blktrace.c:531
 [<ffffffff812511bc>] blk_trace_setup+0x5c/0xa0 kernel/trace/blktrace.c:550
 [<ffffffff812513d2>] blk_trace_ioctl+0xc2/0x160 kernel/trace/blktrace.c:659
 [<ffffffff818b139d>] blkdev_ioctl+0x5fd/0x820 block/ioctl.c:423
 [<ffffffff81342178>] block_ioctl+0x38/0x40 fs/block_dev.c:1586
 [<ffffffff81315eb8>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff81315eb8>] do_vfs_ioctl+0x2d8/0x510 fs/ioctl.c:607
 [<ffffffff81316171>] SYSC_ioctl fs/ioctl.c:622 [inline]
 [<ffffffff81316171>] SyS_ioctl+0x81/0xa0 fs/ioctl.c:613
 [<ffffffff8261ebf2>] system_call_fastpath+0x16/0x7a
Kernel Offset: disabled
drm_kms_helper: panic occurred, switching back to text console