Seen this a few times now with recent kernels: [81416.847584] ------------[ cut here ]------------ [81416.848108] generic_make_request: Trying to write to read-only block-device dm-3 (partno 0) [81416.848613] WARNING: CPU: 6 PID: 1118 at block/blk-core.c:2161 generic_make_request_checks+0x36b/0x410 [81416.849123] Modules linked in: xfs x86_pkg_temp_thermal crc32c_intel [81416.849635] CPU: 6 PID: 1118 Comm: umount Not tainted 4.18.0-01517-g958f338e96f8-dirty #1778 [81416.850736] RIP: 0010:generic_make_request_checks+0x36b/0x410 [81416.851264] Code: ad 14 03 00 00 48 8d 75 b0 48 89 df c6 05 bc fb f6 00 01 e8 e7 63 01 00 48 c7 c7 00 bb 09 82 44 89 ea 48 89 c6 e8 5c 2d d1 ff <0f> 0b 4c 8b 6b 08 e9 25 fd ff ff 65 8b 05 e3 ce c5 7e 89 c0 48 0f [81416.852398] RSP: 0018:ffffc9000369bc40 EFLAGS: 00010286 [81416.852965] RAX: 0000000000000000 RBX: ffff880454ea1240 RCX: 0000000000000006 [81416.853537] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff88046ed95550 [81416.854145] RBP: ffffc9000369bca0 R08: 0000000000000000 R09: 00000000000002b7 [81416.854718] R10: 0000000000000001 R11: 00000000ffffffff R12: 0000000000000000 [81416.855273] R13: 0000000000000000 R14: 0000000000000001 R15: ffff880456d688e0 [81416.855824] FS: 00007f9277f9efc0(0000) GS:ffff88046ed80000(0000) knlGS:0000000000000000 [81416.856383] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [81416.856947] CR2: 00007f92777d77b0 CR3: 0000000456ed4004 CR4: 00000000003606e0 [81416.857517] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [81416.858089] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [81416.858701] Call Trace: [81416.859268] ? kmem_cache_alloc+0xa2/0x180 [81416.859828] generic_make_request+0x5b/0x3a0 [81416.860381] ? mempool_alloc+0x71/0x180 [81416.860935] ? check_preempt_curr+0x79/0x90 [81416.861485] submit_bio+0x49/0x130 [81416.862032] submit_bio_wait+0x59/0x90 [81416.862632] blkdev_issue_flush+0x85/0xb0 [81416.863189] xfs_blkdev_issue_flush+0x19/0x20 [xfs] [81416.863742] xfs_free_buftarg+0x36/0x50 [xfs] [81416.864284] xfs_close_devices+0x5e/0x70 [xfs] [81416.864816] xfs_fs_put_super+0x86/0xb0 [xfs] [81416.865340] generic_shutdown_super+0x6d/0x110 [81416.865855] kill_block_super+0x27/0x50 [81416.866428] deactivate_locked_super+0x35/0x70 [81416.866949] deactivate_super+0x51/0x60 [81416.867470] cleanup_mnt+0x3f/0x70 [81416.867975] __cleanup_mnt+0x12/0x20 [81416.868476] task_work_run+0x9d/0xc0 [81416.868977] exit_to_usermode_loop+0xb8/0xc0 [81416.869468] do_syscall_64+0xd3/0x100 [81416.869964] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [81416.870513] RIP: 0033:0x7f9277881867 [81416.871010] Code: b6 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 01 b6 2b 00 f7 d8 64 89 01 48
