MINIX-fs: bad superblock
MINIX-fs: bad superblock
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8294 Comm: syz-executor0 Not tainted 4.19.0-rc4-next-20180921+ #77
kobject: 'loop1' (00000000643ec8cf): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop1' (00000000643ec8cf): fill_kobj_path: path = '/devices/virtual/block/loop1'
RIP: 0010:__fire_sched_in_preempt_notifiers kernel/sched/core.c:2486 [inline]
RIP: 0010:fire_sched_in_preempt_notifiers kernel/sched/core.c:2492 [inline]
RIP: 0010:finish_task_switch+0x3a4/0x900 kernel/sched/core.c:2684
Code: 3d 04 00 00 4d 8b bc 24 50 03 00 00 4d 85 ff 0f 84 ab fe ff ff 49 bc 00 00 00 00 00 fc ff df 49 8d 7f 10 48 89 f9 48 c1 e9 03 <42> 80 3c 21 00 0f 85 da 03 00 00 49 8b 4f 10 48 89 ce 48 c1 ee 03
RSP: 0018:ffff88018ab56f38 EFLAGS: 00010a06
RAX: 0000000000000000 RBX: ffff8801dac2cc40 RCX: 1bd5a00000000022
RDX: 000000000000a934 RSI: ffffffff810f018e RDI: dead000000000110
RBP: ffff88018ab57020 R08: ffff8801d592a280 R09: fffff52001daf446
R10: fffff52001daf446 R11: ffffc9000ed7a237 R12: dffffc0000000000
R13: ffff88018e39a2c0 R14: 0000000000000000 R15: dead000000000100
------------[ cut here ]------------
FS:  00007f3a26fb3700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000
downgrading a read lock
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
WARNING: CPU: 1 PID: 8296 at kernel/locking/lockdep.c:3623 __lock_downgrade kernel/locking/lockdep.c:3623 [inline]
WARNING: CPU: 1 PID: 8296 at kernel/locking/lockdep.c:3623 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3875
CR2: 00007fc2b4e00df8 CR3: 00000001be97a000 CR4: 00000000001426f0
Kernel panic - not syncing: panic_on_warn set ...

Call Trace:
 context_switch kernel/sched/core.c:2833 [inline]
 __schedule+0x874/0x1ed0 kernel/sched/core.c:3479
 preempt_schedule_common+0x1f/0xd0 kernel/sched/core.c:3603
 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3629
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0xbb/0xd0 kernel/locking/spinlock.c:184
 spin_unlock_irqrestore include/linux/spinlock.h:384 [inline]
 __wake_up_common_lock+0x1d0/0x330 kernel/sched/wait.c:122
 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:199
 sock_def_readable+0x24e/0x710 net/core/sock.c:2695
 __netlink_sendskb+0xa4/0xd0 net/netlink/af_netlink.c:1257
 netlink_broadcast_deliver net/netlink/af_netlink.c:1381 [inline]
 do_one_broadcast net/netlink/af_netlink.c:1466 [inline]
 netlink_broadcast_filtered+0xeb7/0x1680 net/netlink/af_netlink.c:1510
 netlink_broadcast+0x3a/0x50 net/netlink/af_netlink.c:1534
 uevent_net_broadcast_untagged lib/kobject_uevent.c:329 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:406 [inline]
 kobject_uevent_env+0x972/0x1370 lib/kobject_uevent.c:587
 kvm_uevent_notify_change.part.33+0x2f8/0x450 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3921
 kvm_uevent_notify_change arch/x86/kvm/../../../virt/kvm/kvm_main.c:3880 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3218 [inline]
 kvm_dev_ioctl+0xc81/0x1ae0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3240
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
 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
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:00007f3a26fb2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3a26fb36d4 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cfe90 R14: 00000000004bfd7b R15: 0000000000000000
Modules linked in:
Kernel Offset: disabled
Rebooting in 86400 seconds..