Hit by this bug again:
| EXT4-fs error (device vdb): ext4_mb_generate_buddy:757: group 76916, | block bitmap and bg descriptor inconsistent: 959 vs 957 free | clusters | Aborting journal on device vdb-8. | EXT4-fs (vdb): Remounting filesystem read-only | ------------[ cut here ]------------ | WARNING: CPU: 0 PID: 5000 at fs/ext4/mballoc.c:758 | ext4_mb_generate_buddy+0x1fa/0x340() | Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs | msdos jfs xfs libcrc32c xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 | ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack | nf_conntrack iptable_filter ip_tables x_tables cirrus ttm drm_kms_helper | drm kvm_intel kvm ppdev syscopyarea sysfillrect serio_raw pvpanic | sysimgblt 8250_fintek parport_pc i2c_piix4 mac_hid nfsd auth_rpcgss | nfs_acl lockd grace sunrpc lp parport autofs4 psmouse floppy pata_acpi | CPU: 0 PID: 5000 Comm: deluged Not tainted 3.19.8-ckt4 #1 | Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 | ffffffff81ab4fef ffff8800db637858 ffffffff817c3760 ffff88011fc0fdb8 | 0000000000000000 ffff8800db637898 ffffffff8107696a 0000000000000001 | 00000000000003bf ffff8800d98e4000 0000000000008000 ffff8800084c1000 | Call Trace: | [<ffffffff817c3760>] dump_stack+0x45/0x57 | [<ffffffff8107696a>] warn_slowpath_common+0x8a/0xc0 | [<ffffffff81076a5a>] warn_slowpath_null+0x1a/0x20 | [<ffffffff812ae6ea>] ext4_mb_generate_buddy+0x1fa/0x340 | [<ffffffff812aed00>] ext4_mb_init_cache+0x390/0x700 | [<ffffffff812af5cd>] ext4_mb_load_buddy+0x1ad/0x360 | [<ffffffff812b25d7>] ext4_mb_regular_allocator+0x1b7/0x450 | [<ffffffff812b41f1>] ext4_mb_new_blocks+0x401/0x550 | [<ffffffff812a4120>] ? ext4_find_extent+0x140/0x330 | [<ffffffff812a8a87>] ext4_ext_map_blocks+0x637/0xe50 | [<ffffffff8127b6d9>] ext4_map_blocks+0x129/0x570 | [<ffffffff8127eac2>] ext4_writepages+0x582/0xca0 | [<ffffffff810f0700>] ? get_futex_key+0x1c0/0x2b0 | [<ffffffff810a71c8>] ? __enqueue_entity+0x78/0x80 | [<ffffffff81187a4e>] do_writepages+0x1e/0x30 | [<ffffffff8117bbe9>] __filemap_fdatawrite_range+0x59/0x60 | [<ffffffff8117bc4c>] filemap_write_and_wait+0x2c/0x60 | [<ffffffff8120903d>] do_vfs_ioctl+0x3fd/0x4e0 | [<ffffffff812091a1>] SyS_ioctl+0x81/0xa0 | [<ffffffff817ca84d>] system_call_fastpath+0x16/0x1b | ---[ end trace 860c733f0437c9b7 ]---
After which the kernel starts logging in rapid succession: | EXT4-fs error (device vdb): ext4_find_extent:900: inode #84410502: | comm deluged: pblk 223281469 bad header/extent: invalid magic - magic | 80da, entries 13942, max 3979(0), depth 42746(0) | EXT4-fs error: 40 callbacks suppressed
Hit by this bug again:
| EXT4-fs error (device vdb): ext4_mb_ generate_ buddy:757: group 76916, mballoc. c:758 generate_ buddy+0x1fa/ 0x340() 760>] dump_stack+ 0x45/0x57 96a>] warn_slowpath_ common+ 0x8a/0xc0 a5a>] warn_slowpath_ null+0x1a/ 0x20 6ea>] ext4_mb_ generate_ buddy+0x1fa/ 0x340 d00>] ext4_mb_ init_cache+ 0x390/0x700 5cd>] ext4_mb_ load_buddy+ 0x1ad/0x360 5d7>] ext4_mb_ regular_ allocator+ 0x1b7/0x450 1f1>] ext4_mb_ new_blocks+ 0x401/0x550 120>] ? ext4_find_ extent+ 0x140/0x330 a87>] ext4_ext_ map_blocks+ 0x637/0xe50 6d9>] ext4_map_ blocks+ 0x129/0x570 ac2>] ext4_writepages +0x582/ 0xca0 700>] ? get_futex_ key+0x1c0/ 0x2b0 1c8>] ? __enqueue_ entity+ 0x78/0x80 a4e>] do_writepages+ 0x1e/0x30 be9>] __filemap_ fdatawrite_ range+0x59/ 0x60 c4c>] filemap_ write_and_ wait+0x2c/ 0x60 03d>] do_vfs_ ioctl+0x3fd/ 0x4e0 1a1>] SyS_ioctl+0x81/0xa0 84d>] system_ call_fastpath+ 0x16/0x1b
| block bitmap and bg descriptor inconsistent: 959 vs 957 free
| clusters
| Aborting journal on device vdb-8.
| EXT4-fs (vdb): Remounting filesystem read-only
| ------------[ cut here ]------------
| WARNING: CPU: 0 PID: 5000 at fs/ext4/
| ext4_mb_
| Modules linked in: btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs
| msdos jfs xfs libcrc32c xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6
| ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack
| nf_conntrack iptable_filter ip_tables x_tables cirrus ttm drm_kms_helper
| drm kvm_intel kvm ppdev syscopyarea sysfillrect serio_raw pvpanic
| sysimgblt 8250_fintek parport_pc i2c_piix4 mac_hid nfsd auth_rpcgss
| nfs_acl lockd grace sunrpc lp parport autofs4 psmouse floppy pata_acpi
| CPU: 0 PID: 5000 Comm: deluged Not tainted 3.19.8-ckt4 #1
| Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
| ffffffff81ab4fef ffff8800db637858 ffffffff817c3760 ffff88011fc0fdb8
| 0000000000000000 ffff8800db637898 ffffffff8107696a 0000000000000001
| 00000000000003bf ffff8800d98e4000 0000000000008000 ffff8800084c1000
| Call Trace:
| [<ffffffff817c3
| [<ffffffff81076
| [<ffffffff81076
| [<ffffffff812ae
| [<ffffffff812ae
| [<ffffffff812af
| [<ffffffff812b2
| [<ffffffff812b4
| [<ffffffff812a4
| [<ffffffff812a8
| [<ffffffff8127b
| [<ffffffff8127e
| [<ffffffff810f0
| [<ffffffff810a7
| [<ffffffff81187
| [<ffffffff8117b
| [<ffffffff8117b
| [<ffffffff81209
| [<ffffffff81209
| [<ffffffff817ca
| ---[ end trace 860c733f0437c9b7 ]---
After which the kernel starts logging in rapid succession: extent: 900: inode #84410502:
| EXT4-fs error (device vdb): ext4_find_
| comm deluged: pblk 223281469 bad header/extent: invalid magic - magic
| 80da, entries 13942, max 3979(0), depth 42746(0)
| EXT4-fs error: 40 callbacks suppressed