executing program
syzkaller login: [   19.553918] ------------[ cut here ]------------
[   19.554405] WARNING: CPU: 3 PID: 3008 at lib/idr.c:157 idr_replace+0x1d8/0x240
[   19.554883] Kernel panic - not syncing: panic_on_warn set ...
[   19.554883] 
[   19.555358] CPU: 3 PID: 3008 Comm: syzkaller218828 Not tainted 4.13.0-rc4-next-20170811 #2
[   19.555936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   19.556600] Call Trace:
[   19.556778]  dump_stack+0x194/0x257
[   19.557058]  ? arch_local_irq_restore+0x53/0x53
[   19.557374]  panic+0x1e4/0x417
[   19.557587]  ? __warn+0x1d9/0x1d9
[   19.557817]  ? show_regs_print_info+0x65/0x65
[   19.558174]  ? idr_replace+0x1d8/0x240
[   19.558605]  __warn+0x1c4/0x1d9
[   19.558912]  ? idr_replace+0x1d8/0x240
[   19.559271]  report_bug+0x211/0x2d0
[   19.559567]  fixup_bug+0x40/0x90
[   19.559841]  do_trap+0x260/0x390
[   19.560113]  ? rcu_note_context_switch+0x710/0x710
[   19.560509]  do_error_trap+0x120/0x390
[   19.560824]  ? lru_cache_add_file+0x20/0x20
[   19.561181]  ? do_trap+0x390/0x390
[   19.561496]  ? lock_release+0xa40/0xa40
[   19.561742]  ? idr_replace+0x1d8/0x240
[   19.561984]  ? page_add_new_anon_rmap+0x36c/0x750
[   19.562304]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   19.562599]  do_invalid_op+0x1b/0x20
[   19.562825]  invalid_op+0x1e/0x30
[   19.563084] RIP: 0010:idr_replace+0x1d8/0x240
[   19.563470] RSP: 0018:ffff8800394bf9f8 EFLAGS: 00010297
[   19.563927] RAX: ffff88003c6c60c0 RBX: 1ffff10007297f43 RCX: 0000000000000000
[   19.564545] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8800394bfa78
[   19.565024] RBP: ffff8800394bfae0 R08: ffffffff82856487 R09: 0000000000000000
[   19.565501] R10: ffff8800394bf9a8 R11: ffff88006c8bae28 R12: ffffffffffffffff
[   19.566025] R13: ffff8800394bfab8 R14: dffffc0000000000 R15: ffff8800394bfbc8
[   19.566556]  ? drm_gem_handle_delete+0x27/0xa0
[   19.566885]  ? idr_replace+0x1d8/0x240
[   19.567195]  ? idr_for_each+0x3a0/0x3a0
[   19.567513]  ? lock_acquire+0x1d5/0x580
[   19.567844]  drm_gem_handle_delete+0x33/0xa0
[   19.568153]  drm_gem_close_ioctl+0xa1/0xe0
[   19.568457]  drm_ioctl_kernel+0x1e7/0x2e0
[   19.568754]  ? drm_gem_handle_create+0x60/0x60
[   19.569059]  ? drm_ioctl_permit+0x2b0/0x2b0
[   19.569385]  ? kasan_check_write+0x14/0x20
[   19.569672]  ? _copy_from_user+0x99/0x110
[   19.570451]  drm_ioctl+0x72e/0xa50
[   19.570791]  ? drm_gem_handle_create+0x60/0x60
[   19.571127]  ? drm_getstats+0x30/0x30
[   19.571424]  ? handle_mm_fault+0x4e3/0x940
[   19.571759]  ? check_same_owner+0x320/0x320
[   19.572043]  ? __handle_mm_fault+0x3980/0x3980
[   19.572473]  ? vmacache_find+0x61/0x270
[   19.572830]  ? rcu_note_context_switch+0x710/0x710
[   19.573267]  ? drm_getstats+0x30/0x30
[   19.573541]  do_vfs_ioctl+0x1b1/0x1520
[   19.573836]  ? _cond_resched+0x14/0x30
[   19.574115]  ? ioctl_preallocate+0x2b0/0x2b0
[   19.574450]  ? selinux_capable+0x40/0x40
[   19.574734]  ? putname+0xf3/0x130
[   19.574962]  ? do_sys_open+0x320/0x6d0
[   19.575207]  ? security_file_ioctl+0x7d/0xb0
[   19.575491]  ? security_file_ioctl+0x89/0xb0
[   19.575786]  SyS_ioctl+0x8f/0xc0
[   19.576014]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   19.576314] RIP: 0033:0x439049
[   19.576503] RSP: 002b:00007ffdea185018 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   19.577013] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000439049
[   19.577519] RDX: 0000000020001000 RSI: 0000000040086409 RDI: 0000000000000003
[   19.577999] RBP: 00000000006c4018 R08: 0000000000000000 R09: 0000000000000000
[   19.578506] R10: 00000000000000fd R11: 0000000000000246 R12: 0000000000000000
[   19.578987] R13: 0000000000401ca0 R14: 0000000000401d30 R15: 0000000000000000
[   19.579527] Dumping ftrace buffer:
[   19.579747]    (ftrace buffer empty)
[   19.579994] Kernel Offset: disabled
[   19.580232] Rebooting in 86400 seconds..