WARNING: CPU: 1 PID: 3421 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline] WARNING: CPU: 1 PID: 3421 at fs/ext4/page-io.c:206 ext4_put_io_end_defer+0x43c/0x560 fs/ext4/page-io.c:269 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 3421 Comm: udevd Not tainted 4.19.0-rc5-next-20180928+ #84 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 kobject: 'kvm' (000000001bf07b46): kobject_uevent_env panic+0x238/0x4e7 kernel/panic.c:184 kobject: 'kvm' (000000001bf07b46): fill_kobj_path: path = '/devices/virtual/misc/kvm' __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969 RIP: 0010:ext4_add_complete_io fs/ext4/page-io.c:206 [inline] RIP: 0010:ext4_put_io_end_defer+0x43c/0x560 fs/ext4/page-io.c:269 Code: 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2a 01 00 00 49 83 bf e0 02 00 00 00 0f 84 d8 fd ff ff e8 64 96 5c ff <0f> 0b e9 cc fd ff ff e8 c8 4a a0 ff e9 81 fc ff ff 48 89 b5 30 ff RSP: 0018:ffff8801daf07108 EFLAGS: 00010006 RAX: ffff8801c7856000 RBX: ffff88017c018d20 RCX: ffffffff8220cec7 RDX: 0000000000010000 RSI: ffffffff8220d1ec RDI: ffff8801c9fc8e60 RBP: ffff8801daf071f8 R08: ffff8801c7856000 R09: ffffed002f8031a9 R10: ffffed002f8031a9 R11: ffff88017c018d4f R12: 1ffff1003b5e0e26 R13: ffff8801c4cdf530 R14: ffff8801daf071d0 R15: ffff8801c9fc8b80 ext4_end_bio+0x243/0x6e0 fs/ext4/page-io.c:335 bio_endio+0x5ca/0xb60 block/bio.c:1775 req_bio_endio block/blk-core.c:278 [inline] blk_update_request+0x3b8/0xcb0 block/blk-core.c:3075 scsi_end_request+0xde/0x860 drivers/scsi/scsi_lib.c:673 scsi_io_completion+0x2ce/0x1ca0 drivers/scsi/scsi_lib.c:1093 scsi_finish_command+0x579/0x970 drivers/scsi/scsi.c:248 scsi_softirq_done+0x465/0x520 drivers/scsi/scsi_lib.c:1737 __blk_mq_complete_request block/blk-mq.c:586 [inline] blk_mq_complete_request+0x2c2/0x550 block/blk-mq.c:623 scsi_mq_done+0x108/0x460 drivers/scsi/scsi_lib.c:2048 virtscsi_complete_cmd+0x573/0x740 drivers/scsi/virtio_scsi.c:207 virtscsi_vq_done+0xcb/0x180 drivers/scsi/virtio_scsi.c:223 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950 __handle_irq_event_percpu+0x1e1/0xaf0 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x227/0x880 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x98/0x1c0 arch/x86/kernel/irq.c:246 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:582 RIP: 0010:lock_acquire+0x0/0x520 kernel/locking/lockdep.c:3706 Code: e9 15 fb ff ff 4c 89 e7 e8 ed 3b 61 00 e9 77 fc ff ff e8 c3 3b 61 00 e9 92 fd ff ff e8 b9 3b 61 00 e9 0d fe ff ff 0f 1f 40 00 <55> 48 89 e5 41 57 4d 89 cf 41 56 45 89 c6 41 55 41 89 cd 48 b9 00 RSP: 0018:ffff8801c785f978 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdb RAX: ffff8801c7856000 RBX: ffff8801da9d2760 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff89399980 RBP: ffff8801c785fb88 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed0037b34d06 R11: ffff8801bd9a6837 R12: ffff8801bd9a67c0 R13: ffff8801da9d2760 R14: ffff8801c2e4a180 R15: ffff8801c785fb60 common_file_perm+0x198/0x7f0 security/apparmor/lsm.c:462 apparmor_file_permission+0x24/0x30 security/apparmor/lsm.c:475 security_file_permission+0x58/0x230 security/security.c:913 rw_verify_area+0x111/0x360 fs/read_write.c:391 vfs_read+0x149/0x3c0 fs/read_write.c:448 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8bbc275310 Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 RSP: 002b:00007ffd7a5d4258 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00000000020601b0 RCX: 00007f8bbc275310 RDX: 0000000000001000 RSI: 00007f8bbcb73000 RDI: 000000000000000b RBP: 0000000000003fff R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 000000000000000a R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd7a5d4720 Kernel Offset: disabled Rebooting in 86400 seconds..