executing program
syzkaller login: [   26.401970] ------------[ cut here ]------------
[   26.402489] WARNING: CPU: 0 PID: 2961 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70
[   26.403550] Kernel panic - not syncing: panic_on_warn set ...
[   26.403550] 
[   26.404246] CPU: 0 PID: 2961 Comm: syzkaller163741 Not tainted 4.13.0-rc7-next-20170901+ #13
[   26.405952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   26.406770] Call Trace:
[   26.407015]  dump_stack+0x194/0x257
[   26.407355]  ? arch_local_irq_restore+0x53/0x53
[   26.407793]  panic+0x1e4/0x417
[   26.408091]  ? __warn+0x1d9/0x1d9
[   26.408382]  ? show_regs_print_info+0x65/0x65
[   26.408926]  ? kmalloc_slab+0x5d/0x70
[   26.409290]  __warn+0x1c4/0x1d9
[   26.409612]  ? kmalloc_slab+0x5d/0x70
[   26.409958]  report_bug+0x211/0x2d0
[   26.410295]  fixup_bug+0x40/0x90
[   26.410586]  do_trap+0x260/0x390
[   26.410888]  do_error_trap+0x120/0x390
[   26.411242]  ? do_trap+0x390/0x390
[   26.411562]  ? kmalloc_slab+0x5d/0x70
[   26.411902]  ? unwind_dump+0x4c0/0x4c0
[   26.412258]  ? do_raw_spin_trylock+0x190/0x190
[   26.412685]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   26.413131]  do_invalid_op+0x1b/0x20
[   26.413464]  invalid_op+0x18/0x20
[   26.413775] RIP: 0010:kmalloc_slab+0x5d/0x70
[   26.414168] RSP: 0018:ffff88006c727908 EFLAGS: 00010246
[   26.414650] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000018
[   26.415218] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000007000050
[   26.415866] RBP: ffff88006c727908 R08: ffffed0007b9a817 R09: 0000000000000100
[   26.416438] R10: 0000000000000800 R11: ffffed0007b9a817 R12: 1ffff1000d8e4f39
[   26.417052] R13: ffff88003bfba1c0 R14: 00000000014080c0 R15: ffff88003dcd00c8
[   26.417727]  __kmalloc+0x25/0x760
[   26.418044]  ? save_stack_trace+0x16/0x20
[   26.418427]  ? save_stack+0x43/0xd0
[   26.418758]  ? kasan_kmalloc+0xad/0xe0
[   26.419111]  ? __kmalloc+0x162/0x760
[   26.419450]  ? drm_ioctl+0x437/0xa50
[   26.419785]  ? do_vfs_ioctl+0x1b1/0x1530
[   26.420155]  ? SyS_ioctl+0x8f/0xc0
[   26.420474]  ? entry_SYSCALL_64_fastpath+0x1f/0xbe
[   26.420921]  ? drm_property_create_blob.part.3+0x96/0x440
[   26.421421]  drm_property_create_blob.part.3+0x96/0x440
[   26.421903]  ? drm_property_destroy+0x520/0x520
[   26.422327]  ? lock_downgrade+0x990/0x990
[   26.422702]  ? __kmalloc+0x4aa/0x760
[   26.423055]  drm_mode_createblob_ioctl+0x145/0x490
[   26.423443]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.423804]  ? lock_release+0xd70/0xd70
[   26.424170]  ? check_same_owner+0x320/0x320
[   26.424562]  ? __check_object_size+0x25d/0x4f0
[   26.424984]  drm_ioctl_kernel+0x1e7/0x2e0
[   26.425355]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.425776]  ? drm_ioctl_permit+0x2b0/0x2b0
[   26.426375]  ? kasan_check_write+0x14/0x20
[   26.426744]  ? _copy_from_user+0x99/0x110
[   26.427128]  drm_ioctl+0x72e/0xa50
[   26.427453]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.427899]  ? drm_getstats+0x30/0x30
[   26.428259]  ? check_same_owner+0x320/0x320
[   26.428652]  ? __handle_mm_fault+0x39c0/0x39c0
[   26.429078]  ? vmacache_find+0x61/0x270
[   26.429424]  ? rcu_note_context_switch+0x710/0x710
[   26.429896]  ? drm_getstats+0x30/0x30
[   26.430258]  do_vfs_ioctl+0x1b1/0x1530
[   26.430634]  ? _cond_resched+0x14/0x30
[   26.431008]  ? ioctl_preallocate+0x2b0/0x2b0
[   26.431416]  ? selinux_capable+0x40/0x40
[   26.431802]  ? putname+0xf3/0x130
[   26.432124]  ? do_sys_open+0x320/0x6d0
[   26.432489]  ? security_file_ioctl+0x7d/0xb0
[   26.432901]  ? security_file_ioctl+0x89/0xb0
[   26.433309]  SyS_ioctl+0x8f/0xc0
[   26.433624]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   26.434059] RIP: 0033:0x438fe9
[   26.434355] RSP: 002b:00007ffc8b3418c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[   26.435054] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000438fe9
[   26.435712] RDX: 0000000020929ff2 RSI: fffffffffffff4bd RDI: 0000000000000003
[   26.436368] RBP: 0000000000000082 R08: 00000000000000fd R09: 0000000000000000
[   26.437025] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[   26.437686] R13: 0000000000401c40 R14: 0000000000401cd0 R15: 0000000000000000
[   26.438466] Dumping ftrace buffer:
[   26.438851]    (ftrace buffer empty)
[   26.439195] Kernel Offset: disabled
[   26.439537] Rebooting in 86400 seconds..