------------[ cut here ]------------
WARNING: CPU: 2 PID: 23542 at lib/idr.c:154 idr_replace+0x44/0x60 lib/idr.c:154
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 23542 Comm: syz-executor3 Not tainted 4.13.0-next-20170913+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:idr_replace+0x44/0x60 lib/idr.c:154
RSP: 0018:ffff8800347d7aa0 EFLAGS: 00010212
RAX: 0000000000010000 RBX: 00000000e5ff7e1c RCX: ffffc90001e61000
RDX: 0000000000000227 RSI: ffffffff84cdd154 RDI: ffff8800688f6df8
RBP: ffff8800347d7ab8 R08: ffff8800347d7418 R09: ffff8800347d7410
R10: ffff8800347d7388 R11: 1ffff10007500f03 R12: ffff8800688f6df8
R13: 0000000000000000 R14: ffff8800688f6df8 R15: ffff8800347d7bc8
 drm_gem_handle_delete+0x33/0xa0 drivers/gpu/drm/drm_gem.c:297
 drm_gem_dumb_destroy+0x1d/0x30 drivers/gpu/drm/drm_gem.c:362
 drm_mode_destroy_dumb_ioctl+0x10a/0x140 drivers/gpu/drm/drm_dumb_buffers.c:136
 drm_ioctl_kernel+0x1e7/0x2e0 drivers/gpu/drm/drm_ioctl.c:735
 drm_ioctl+0x72e/0xa50 drivers/gpu/drm/drm_ioctl.c:831
 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:00007facef18ec08 EFLAGS: 00000296 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000019 RCX: 0000000000447299
RDX: 0000000020ad8000 RSI: fffffbfffffff4b4 RDI: 0000000000000019
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 00000000ffffffff
R13: 0000000000003d10 R14: 00000000006e6dd0 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..