kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read WARNING: CPU: 1 PID: 10598 at fs/ext4/page-io.c:206 ext4_add_complete_io fs/ext4/page-io.c:206 [inline] WARNING: CPU: 1 PID: 10598 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: 10598 Comm: syz-executor2 Not tainted 4.19.0-rc6-next-20181005+ #88 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 __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 54 ef 5b ff <0f> 0b e9 cc fd ff ff e8 58 07 a0 ff e9 81 fc ff ff 48 89 b5 30 ff RSP: 0018:ffff8801daf07108 EFLAGS: 00010006 RAX: ffff8801bced20c0 RBX: ffff8801cb9a3300 RCX: ffffffff82218b57 RDX: 0000000000010000 RSI: ffffffff82218e7c RDI: ffff8801c9446e20 RBP: ffff8801daf071f8 R08: ffff8801bced20c0 R09: ffffed0039734665 R10: ffffed0039734665 R11: ffff8801cb9a332f R12: 1ffff1003b5e0e26 R13: ffff8801cbbf7470 R14: ffff8801daf071d0 R15: ffff8801c9446b40 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:__test_set_page_writeback+0x12f/0x1f30 mm/page-writeback.c:2753 Code: f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 c4 5d dc ff 48 89 df e8 8c fd 09 00 48 89 df 49 89 c5 e8 91 02 27 00 <4d> 85 ed 74 40 e8 a7 5d dc ff 49 8d bd 08 01 00 00 48 89 f8 48 c1 RSP: 0018:ffff880184c6e960 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdb RAX: ffff8801c0fea0c0 RBX: ffffea0006c9cb40 RCX: 0000000000000004 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff880184c6ed08 R08: ffffed00381fd4e9 R09: ffffed00381fd4e8 R10: ffffed00381fd4e8 R11: ffff8801c0fea743 R12: ffff880184c6ece0 R13: ffff8801cbbf7670 R14: dffffc0000000000 R15: 0000000000000000 set_page_writeback include/linux/page-flags.h:509 [inline] ext4_bio_write_page+0x505/0x1d3b fs/ext4/page-io.c:432 mpage_submit_page+0x15e/0x270 fs/ext4/inode.c:2237 mpage_map_and_submit_buffers+0x55e/0xa40 fs/ext4/inode.c:2434 mpage_map_and_submit_extent fs/ext4/inode.c:2572 [inline] ext4_writepages+0x2704/0x4170 fs/ext4/inode.c:2884 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2331 __filemap_fdatawrite_range+0x364/0x4a0 mm/filemap.c:411 file_write_and_wait_range+0x98/0x100 mm/filemap.c:730 ext4_sync_file+0x2ef/0x1500 fs/ext4/fsync.c:128 vfs_fsync_range+0x140/0x220 fs/sync.c:197 generic_write_sync include/linux/fs.h:2776 [inline] ext4_file_write_iter+0x692/0x1420 fs/ext4/file.c:270 call_write_iter include/linux/fs.h:1844 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457579 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:00007f5b9d1b6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 RDX: 000000002001007f RSI: 0000000020000080 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5b9d1b76d4 R13: 00000000004c5574 R14: 00000000004d8e98 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..