WARNING: CPU: 1 PID: 11738 at mm/slab_common.c:1027 kmalloc_slab+0x6e/0x80 mm/slab_common.c:1027
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 11738 Comm: syz-executor3 Not tainted 4.19.0-rc4-next-20180921+ #77
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
kobject: 'loop0' (00000000801859d0): kobject_uevent_env
kobject: 'loop0' (00000000801859d0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
kobject: 'loop4' (00000000e493b4eb): kobject_uevent_env
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
kobject: 'loop4' (00000000e493b4eb): fill_kobj_path: path = '/devices/virtual/block/loop4'
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:kmalloc_slab+0x6e/0x80 mm/slab_common.c:1027
Code: e9 04 f7 d0 83 e6 01 21 c8 83 e0 01 8d 04 70 48 6b c0 17 48 01 d0 48 8b 04 c5 60 da 37 89 5d c3 31 c0 81 e6 00 02 00 00 75 f4 <0f> 0b 5d c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 c7 c7
RSP: 0018:ffff880193f3f978 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffffffd RCX: ffffc90004469000
kobject: 'loop0' (00000000801859d0): kobject_uevent_env
RDX: 000000000000004c RSI: 0000000000000000 RDI: 0000003fffffff60
RBP: ffff880193f3f978 R08: ffff8801989f6180 R09: ffffed0038b749b9
R10: ffff880193f3fa48 R11: ffff8801c5ba4dcf R12: 0000000000000000
R13: 0000000000000000 R14: ffff8801c0d82a00 R15: 00000000006080c0
 __do_kmalloc mm/slab.c:3713 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3727
kobject: 'loop0' (00000000801859d0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 kmalloc include/linux/slab.h:551 [inline]
 kzalloc include/linux/slab.h:741 [inline]
 input_mt_init_slots+0xe5/0x4a0 drivers/input/input-mt.c:52
 uinput_create_device drivers/input/misc/uinput.c:335 [inline]
 uinput_ioctl_handler.isra.10+0x2049/0x2540 drivers/input/misc/uinput.c:876
 uinput_ioctl+0x4c/0x60 drivers/input/misc/uinput.c:1047
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
kobject: 'loop0' (00000000801859d0): kobject_uevent_env
kobject: 'loop0' (00000000801859d0): fill_kobj_path: path = '/devices/virtual/block/loop0'
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'loop4' (00000000e493b4eb): kobject_uevent_env
RIP: 0033:0x457679
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6a532e1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6a532e26d4 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
kobject: 'loop4' (00000000e493b4eb): fill_kobj_path: path = '/devices/virtual/block/loop4'
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d1de8 R14: 00000000004c13b6 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..