FAT-fs (loop3): invalid media value (0xbd)
FAT-fs (loop3): Can't find a valid FAT filesystem
BUG: unable to handle kernel paging request at ffff8801cd74e000
PGD bc01067 P4D bc01067 PUD 1d940b063 PMD 80000001cd6001e3 
Oops: 000b [#1] PREEMPT SMP KASAN
CPU: 1 PID: 10764 Comm: syz-executor4 Not tainted 4.19.0-rc7+ #275
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__update_clear_spte_fast include/linux/compiler.h:215 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:819 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:1998 [inline]
RIP: 0010:mmu_page_zap_pte+0x295/0x390 arch/x86/kvm/mmu.c:2576
Code: 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c7 85 58 ff ff ff 00 00 00 00 48 c1 ea 03 80 3c 02 00 0f 85 d4 00 00 00 48 c1 eb 03 <49> c7 45 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 be 01 00
RSP: 0018:ffff880185556e08 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: 1ffff10030aaadc6 RCX: ffffc9000e469000
RDX: 1ffff10039ae9c00 RSI: ffffffff8111178b RDI: 0000000000000007
RBP: ffff880185556ed8 R08: ffff880185f34380 R09: fffff520014ee93a
R10: fffff520014ee93a R11: ffffc9000a7749d3 R12: 1ffff10030aaadc2
R13: ffff8801cd74e000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007fba3e6f3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801cd74e000 CR3: 00000001d35f6000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_mmu_page_unlink_children arch/x86/kvm/mmu.c:2593 [inline]
 kvm_mmu_prepare_zap_page+0x1f9/0x1510 arch/x86/kvm/mmu.c:2637
kobject: 'loop3' (00000000a595fbf3): kobject_uevent_env
kobject: 'loop3' (00000000a595fbf3): fill_kobj_path: path = '/devices/virtual/block/loop3'
 kvm_zap_obsolete_pages arch/x86/kvm/mmu.c:5736 [inline]
 kvm_mmu_invalidate_zap_all_pages+0x348/0x7b0 arch/x86/kvm/mmu.c:5777
 kvm_arch_flush_shadow_all+0x15/0x20 arch/x86/kvm/x86.c:9215
 kvm_mmu_notifier_release+0x59/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:497
 mmu_notifier_unregister+0x1ff/0x600 mm/mmu_notifier.c:396
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:748 [inline]
 kvm_put_kvm+0x6c0/0xff0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:773
 kvm_vcpu_release+0x7b/0xa0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2407
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 get_signal+0x155e/0x1980 kernel/signal.c:2343
 do_signal+0x9c/0x21e0 arch/x86/kernel/signal.c:816
syz-executor1 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), nodemask=(null), order=0, oom_score_adj=0
 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
syz-executor1 cpuset=
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
syz1
RIP: 0033:0x4573e7
 mems_allowed=0
Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 7d b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fba3e6f1098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000018 RCX: 00000000004573e7
RDX: 00007fba3e6f16f0 RSI: 000000008138ae83 RDI: 0000000000000005
RBP: 0000000020017000 R08: 0000000000000001 R09: 0000000000000028
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000
R13: 00000000ffffffff R14: 00000000004d7cf8 R15: 00000000ffffffff
Modules linked in:
CPU: 0 PID: 10758 Comm: syz-executor1 Not tainted 4.19.0-rc7+ #275
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
CR2: ffff8801cd74e000
Call Trace:
---[ end trace 8c8e313180cdae36 ]---
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
RIP: 0010:__update_clear_spte_fast include/linux/compiler.h:215 [inline]
RIP: 0010:mmu_spte_clear_no_track arch/x86/kvm/mmu.c:819 [inline]
RIP: 0010:drop_parent_pte arch/x86/kvm/mmu.c:1998 [inline]
RIP: 0010:mmu_page_zap_pte+0x295/0x390 arch/x86/kvm/mmu.c:2576
Code: 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c7 85 58 ff ff ff 00 00 00 00 48 c1 ea 03 80 3c 02 00 0f 85 d4 00 00 00 48 c1 eb 03 <49> c7 45 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 be 01 00
RSP: 0018:ffff880185556e08 EFLAGS: 00010a06
 dump_header+0x27b/0xf72 mm/oom_kill.c:441
RAX: dffffc0000000000 RBX: 1ffff10030aaadc6 RCX: ffffc9000e469000
RDX: 1ffff10039ae9c00 RSI: ffffffff8111178b RDI: 0000000000000007
RBP: ffff880185556ed8 R08: ffff880185f34380 R09: fffff520014ee93a
R10: fffff520014ee93a R11: ffffc9000a7749d3 R12: 1ffff10030aaadc2
R13: ffff8801cd74e000 R14: 0000000000000004 R15: 0000000000000000
FS:  00007fba3e6f3700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801cd74e000 CR3: 00000001d35f6000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400