Console: switching to colour dummy device 80x25
=============================================================================
BUG virtio-gpu-vbufs (Not tainted): Objects remaining on __kmem_cache_shutdown()
-----------------------------------------------------------------------------

Object 0xffff88801fbb9460 @offset=1120
Object 0xffff88801fbb9578 @offset=1400
Object 0xffff88801fbb9690 @offset=1680
Slab 0xffffea00007eee40 objects=14 used=3 fp=0xffff88801fbb97a8 flags=0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff)
Disabling lock debugging due to kernel taint
------------[ cut here ]------------
1
WARNING: mm/slub.c:1268 at __slab_err+0x15/0x20 mm/slub.c:1268, CPU#0: syz.0.0/5327
Modules linked in:
CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__slab_err+0x15/0x20 mm/slub.c:1268
Code: 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e8 2b 00 00 00 bf 05 00 00 00 be 01 00 00 00 e8 4c 0c 5f 00 90 <0f> 0b 90 e9 83 bb c0 0a cc 66 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000f40f6d8 EFLAGS: 00010087
RAX: ffffffff818749fa RBX: ffff888034e01140 RCX: 0000000000100000
RDX: ffffc9000ea92000 RSI: 0000000000011073 RDI: 0000000000011074
RBP: ffffc9000f40f6f0 R08: ffffffff939980a7 R09: 1ffffffff2733014
R10: dffffc0000000000 R11: fffffbfff2733015 R12: ffffea000002e950
R13: ffffea00007eee40 R14: ffffc9000f40f6f0 R15: ffff88801c2b1000
FS:  00007fd2c0b116c0(0000) GS:ffff88808c2cf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fba3f7909c0 CR3: 000000001324e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 free_partial mm/slub.c:8115 [inline]
 __kmem_cache_shutdown+0x1a5/0x2b0 mm/slub.c:8158
 kmem_cache_destroy+0x9d/0x180 mm/slab_common.c:576
 virtio_gpu_free_vbufs+0x40/0x70 drivers/gpu/drm/virtio/virtgpu_vq.c:86
 virtio_gpu_release+0x55/0x140 drivers/gpu/drm/virtio/virtgpu_kms.c:367
 drm_dev_release drivers/gpu/drm/drm_drv.c:922 [inline]
 kref_put include/linux/kref.h:65 [inline]
 drm_dev_put+0xa9/0x120 drivers/gpu/drm/drm_drv.c:958
 virtio_dev_remove+0x9c/0x1b0 drivers/virtio/virtio.c:375
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x444/0x560 drivers/base/bus.c:664
 device_del+0x524/0x8f0 drivers/base/core.c:3965
 device_unregister+0x21/0xf0 drivers/base/core.c:4006
 unregister_virtio_device+0x37/0x60 drivers/virtio/virtio.c:607
 virtio_pci_remove+0x7f/0xf0 drivers/virtio/virtio_pci_common.c:758
 pci_device_remove+0x99/0x1c0 drivers/pci/pci-driver.c:535
 device_remove drivers/base/dd.c:616 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x48b/0x880 drivers/base/dd.c:1372
 pci_stop_dev drivers/pci/remove.c:27 [inline]
 pci_stop_bus_device+0xf6/0x120 drivers/pci/remove.c:94
 pci_stop_and_remove_bus_device drivers/pci/remove.c:129 [inline]
 pci_stop_and_remove_bus_device_locked+0x77/0xb0 drivers/pci/remove.c:137
 remove_store+0xe5/0x150 drivers/pci/pci-sysfs.c:524
 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd2bfb9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd2c0b10fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd2bfe25fa0 RCX: 00007fd2bfb9e159
RDX: 0000000000000001 RSI: 00002000000000c0 RDI: 000000000000000a
RBP: 00007fd2bfc35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd2bfe26038 R14: 00007fd2bfe25fa0 R15: 00007fffc8b1b948
 </TASK>