------------[ cut here ]------------ kernel BUG at fs/buffer.c:605! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 9796 Comm: syz-executor.0 Not tainted 4.14.160-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808f6582c0 task.stack: ffff88803f870000 RIP: 0010:mark_buffer_dirty_inode fs/buffer.c:605 [inline] RIP: 0010:mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596 RSP: 0000:ffff88803f877a20 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff888084501f18 RCX: ffffc900148a1000 RDX: 0000000000040000 RSI: ffffffff819bab3a RDI: ffff888095e5a9b8 RBP: ffff88803f877a58 R08: ffff88808f6582c0 R09: 0000000000000002 R10: 0000000000000000 R11: ffff88808f6582c0 R12: ffff888095e5a858 R13: 0000000000000000 R14: ffff888099f1c460 R15: 0000000000001049 FS: 00007f076e57e700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020600000 CR3: 00000000949dd000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fat16_ent_put+0xc5/0x100 fs/fat/fatent.c:181 fat_ent_write+0xc2/0x190 fs/fat/fatent.c:416 fat_chain_add+0x3ed/0x590 fs/fat/misc.c:128 fat_add_cluster+0xa1/0xc0 fs/fat/inode.c:105 fat_fallocate+0x249/0x2e0 fs/fat/file.c:267 vfs_fallocate+0x34f/0x7a0 fs/open.c:319 ioctl_preallocate+0x14c/0x1c0 fs/ioctl.c:481 file_ioctl fs/ioctl.c:497 [inline] do_vfs_ioctl+0xded/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45a919 RSP: 002b:00007f076e57dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919 RDX: 0000000020000000 RSI: 0000000040305828 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f076e57e6d4 R13: 00000000004c34d0 R14: 00000000004d8948 R15: 00000000ffffffff Code: fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 4d 4c 89 63 58 4c 89 ef e8 00 65 c9 04 e9 13 fe ff ff e8 36 a4 c1 ff <0f> 0b 4c 89 ff e8 ac 31 ec ff e9 f8 fd ff ff e8 a2 31 ec ff e9 RIP: mark_buffer_dirty_inode fs/buffer.c:605 [inline] RSP: ffff88803f877a20 RIP: mark_buffer_dirty_inode+0x2ea/0x3e0 fs/buffer.c:596 RSP: ffff88803f877a20 loop_set_status: loop0 () has still dirty pages (nrpages=1) kobject: 'lo' (ffff88804fa34730): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'lo' (ffff88804fa34730): kobject_uevent_env kobject: 'lo' (ffff88804fa34730): fill_kobj_path: path = '/devices/virtual/net/lo' kobject: 'queues' (ffff88803e57ba48): kobject_add_internal: parent: 'lo', set: '' kobject: 'queues' (ffff88803e57ba48): kobject_uevent_env kobject: 'loop5' (ffff8880a421e620): kobject_uevent_env kobject: 'loop5' (ffff8880a421e620): fill_kobj_path: path = '/devices/virtual/block/loop5' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): Filesystem has been set read-only kobject: 'queues' (ffff88803e57ba48): kobject_uevent_env: filter function caused the event to drop! FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'rx-0' (ffff888040a8c310): kobject_add_internal: parent: 'queues', set: 'queues' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'loop4' (ffff8880a42136e0): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'loop4' (ffff8880a42136e0): fill_kobj_path: path = '/devices/virtual/block/loop4' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'rx-0' (ffff888040a8c310): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'rx-0' (ffff888040a8c310): fill_kobj_path: path = '/devices/virtual/net/lo/queues/rx-0' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'tx-0' (ffff888050cf7818): kobject_add_internal: parent: 'queues', set: 'queues' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'tx-0' (ffff888050cf7818): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'tx-0' (ffff888050cf7818): fill_kobj_path: path = '/devices/virtual/net/lo/queues/tx-0' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'nr0' (ffff888051298a70): kobject_add_internal: parent: 'net', set: 'devices' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'nr0' (ffff888051298a70): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'nr0' (ffff888051298a70): fill_kobj_path: path = '/devices/virtual/net/nr0' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'queues' (ffff88803e57b648): kobject_add_internal: parent: 'nr0', set: '' FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'kvm' (ffff88821948c990): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'kvm' (ffff88821948c990): fill_kobj_path: path = '/devices/virtual/misc/kvm' ---[ end trace b3b12f92939755b9 ]--- kobject: 'queues' (ffff88803e57b648): kobject_uevent_env FAT-fs (loop0): error, fat_bmap_cluster: request beyond EOF (i_pos 198) kobject: 'loop3' (ffff8880a41a9660): kobject_uevent_env