Debian GNU/Linux 7 syzkaller ttyS0

executing program
syzkaller login: [   26.407966] ------------[ cut here ]------------
[   26.409543] WARNING: CPU: 3 PID: 2996 at mm/slab_common.c:962 kmalloc_slab+0x5d/0x70
[   26.411931] Kernel panic - not syncing: panic_on_warn set ...
[   26.411931] 
[   26.413244] CPU: 3 PID: 2996 Comm: syzkaller293709 Not tainted 4.13.0-next-20170912+ #2
[   26.415335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   26.417115] Call Trace:
[   26.417377]  dump_stack+0x194/0x257
[   26.418589]  ? arch_local_irq_restore+0x53/0x53
[   26.419113]  panic+0x1e4/0x417
[   26.419458]  ? __warn+0x1d9/0x1d9
[   26.419821]  ? show_regs_print_info+0x65/0x65
[   26.420281]  ? kmalloc_slab+0x5d/0x70
[   26.420922]  __warn+0x1c4/0x1d9
[   26.421549]  ? kmalloc_slab+0x5d/0x70
[   26.421972]  report_bug+0x211/0x2d0
[   26.422369]  fixup_bug+0x40/0x90
[   26.422733]  do_trap+0x260/0x390
[   26.423191]  do_error_trap+0x120/0x390
[   26.423845]  ? do_trap+0x390/0x390
[   26.424544]  ? kmalloc_slab+0x5d/0x70
[   26.425124]  ? lock_downgrade+0x990/0x990
[   26.425548]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   26.426015]  do_invalid_op+0x1b/0x20
[   26.426363]  invalid_op+0x18/0x20
[   26.426682] RIP: 0010:kmalloc_slab+0x5d/0x70
[   26.427134] RSP: 0018:ffff88003dbaf908 EFLAGS: 00010246
[   26.427825] RAX: 0000000000000000 RBX: fffffffffffffff4 RCX: 0000000000000018
[   26.428668] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000100004f
[   26.429335] RBP: ffff88003dbaf908 R08: ffffed000cff386f R09: 0000000000000100
[   26.429996] R10: 0000000000000800 R11: ffffed000cff386f R12: 1ffff10007b75f39
[   26.430639] R13: ffff88006b654300 R14: 00000000014080c0 R15: ffff880067f98388
[   26.431437]  __kmalloc+0x25/0x760
[   26.431842]  ? __do_page_fault+0x35b/0xb60
[   26.432395]  ? __kmalloc+0x162/0x760
[   26.432838]  ? drm_property_create_blob.part.3+0x96/0x440
[   26.433452]  drm_property_create_blob.part.3+0x96/0x440
[   26.434053]  ? drm_property_destroy+0x520/0x520
[   26.434722]  ? lock_downgrade+0x990/0x990
[   26.435214]  drm_mode_createblob_ioctl+0x145/0x490
[   26.436279]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.437064]  ? retint_kernel+0x10/0x10
[   26.437816]  drm_ioctl_kernel+0x1e7/0x2e0
[   26.438602]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.439937]  ? drm_ioctl_permit+0x2b0/0x2b0
[   26.440413]  ? copy_user_generic_string+0x2c/0x40
[   26.441216]  ? _copy_from_user+0x99/0x110
[   26.442017]  drm_ioctl+0x72e/0xa50
[   26.442695]  ? drm_mode_getblob_ioctl+0x230/0x230
[   26.443397]  ? drm_getstats+0x30/0x30
[   26.443992]  ? check_same_owner+0x320/0x320
[   26.444629]  ? __handle_mm_fault+0x39c0/0x39c0
[   26.445506]  ? vmacache_find+0x61/0x270
[   26.446248]  ? drm_getstats+0x30/0x30
[   26.446818]  do_vfs_ioctl+0x1b1/0x1530
[   26.447439]  ? ioctl_preallocate+0x2b0/0x2b0
[   26.447967]  ? selinux_capable+0x40/0x40
[   26.448447]  ? putname+0xf3/0x130
[   26.448874]  ? do_sys_open+0x320/0x6d0
[   26.449318]  ? security_file_ioctl+0x7d/0xb0
[   26.449803]  ? security_file_ioctl+0x89/0xb0
[   26.450301]  SyS_ioctl+0x8f/0xc0
[   26.450690]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   26.451234] RIP: 0033:0x438fe9
[   26.451585] RSP: 002b:00007fff82785608 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[   26.452401] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000438fe9
[   26.453073] RDX: 0000000020f17000 RSI: fffffffffffff4bd RDI: 0000000000000003
[   26.453740] RBP: 0000000000000082 R08: 00000000000000fd R09: 0000000000000000
[   26.454401] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
[   26.455076] R13: 0000000000401c40 R14: 0000000000401cd0 R15: 0000000000000000
[   26.455947] Dumping ftrace buffer:
[   26.456415]    (ftrace buffer empty)
[   26.456800] Kernel Offset: disabled
[   26.457434] Rebooting in 86400 seconds..