*** This bug is a duplicate of bug 1413008 ***
https://bugs.launchpad.net/bugs/1413008
This bug also affects me. I just upgraded to Ubuntu 15.04 a few days
ago. I created a new btrfs filesystem where I accidentally filled it by
doubling my backup (3TB). I then deleted one of the backups, and tried
to get a directory listing with ls in the directory that had been
cleared. My dmesg trace is:
[153577.431806] ------------[ cut here ]------------
[153577.436040] kernel BUG at /build/buildd/linux-3.19.0/fs/btrfs/inode.c:3142!
[153577.436040] invalid opcode: 0000 [#1] SMP
[153577.436040] Modules linked in: nls_utf8 ufs qnx4 hfsplus hfs minix ntfs
msdos jfs xfs libcrc32c cfg80211 binfmt_misc snd_hda_codec_analog
snd_hda_codec_generic hp_wmi sparse_keymap snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi kvm
snd_seq snd_seq_device serio_raw snd_timer k8temp edac_core edac_mce_amd
i2c_piix4 snd soundcore 8250_fintek tpm_infineon shpchp mac_hid nfsd
auth_rpcgss nfs_acl lockd grace sunrpc parport_pc ppdev lp parport autofs4
btrfs xor raid6_pq hid_generic usbhid hid amdkfd amd_iommu_v2 psmouse radeon
tg3 floppy ahci i2c_algo_bit ptp ttm pps_core wmi drm_kms_helper libahci drm
[153577.436040] CPU: 1 PID: 14763 Comm: btrfs-cleaner Not tainted
3.19.0-18-generic #18-Ubuntu
[153577.436040] Hardware name: Hewlett-Packard HP Compaq dc5850 Small Form
Factor/3029h, BIOS 786F6 v01.09 04/09/2008
[153577.436040] task: ffff8800c9236bf0 ti: ffff880104ae0000 task.ti:
ffff880104ae0000
[153577.436040] RIP: 0010:[<ffffffffc05cf970>] [<ffffffffc05cf970>]
btrfs_orphan_add+0x1c0/0x1e0 [btrfs]
[153577.436040] RSP: 0018:ffff880104ae3c38 EFLAGS: 00010286
[153577.436040] RAX: 00000000ffffffe4 RBX: ffff88017e988800 RCX:
ffff880171a8f000
[153577.436040] RDX: 000000000000910c RSI: 0000000000040000 RDI:
ffff880171a8f138
[153577.436040] RBP: ffff880104ae3c78 R08: 000000000001db50 R09:
ffff880003081e10
[153577.436040] R10: ffff88019fc9db90 R11: ffffea0002753540 R12:
ffff88001514efc0
[153577.436040] R13: ffff880196c0ae70 R14: ffff88017e988c58 R15:
0000000000000001
[153577.436040] FS: 00007fa1534ee700(0000) GS:ffff88019fc80000(0000)
knlGS:0000000000000000
[153577.436040] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[153577.436040] CR2: 00000000028c2010 CR3: 00000000c9362000 CR4:
00000000000007e0
[153577.436040] Stack:
[153577.436040] ffff880104ae3c78 ffffffffc060dc05 ffff880171a8f000
ffff88017e98c800
[153577.436040] ffff880003081e10 ffff88001514efc0 ffff880102753a00
ffff8801700f51b0
[153577.436040] ffff880104ae3d08 ffffffffc05b92ca ffff880003081e18
ffff880003081e90
[153577.436040] Call Trace:
[153577.436040] [<ffffffffc060dc05>] ? lookup_free_space_inode+0x45/0xf0
[btrfs]
[153577.436040] [<ffffffffc05b92ca>] btrfs_remove_block_group+0x13a/0x760
[btrfs]
[153577.436040] [<ffffffffc05f2e4a>] btrfs_remove_chunk+0x63a/0x760 [btrfs]
[153577.436040] [<ffffffffc05b9b39>] btrfs_delete_unused_bgs+0x249/0x270
[btrfs]
[153577.436040] [<ffffffffc05c20d4>] cleaner_kthread+0x144/0x1a0 [btrfs]
[153577.436040] [<ffffffffc05c1f90>] ? check_leaf+0x360/0x360 [btrfs]
[153577.436040] [<ffffffff81094739>] kthread+0xc9/0xe0
[153577.436040] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[153577.436040] [<ffffffff817c9858>] ret_from_fork+0x58/0x90
[153577.436040] [<ffffffff81094670>] ? kthread_create_on_node+0x1c0/0x1c0
[153577.436040] Code: 60 04 00 00 e9 b0 fe ff ff 66 90 89 45 c8 f0 41 80 64 24
80 fd 4c 89 e7 e8 9e 21 fe ff 8b 45 c8 e9 1b ff ff ff 66 0f 1f 44 00 00 <0f> 0b
b8 f4 ff ff ff e9 10 ff ff ff 4c 89 f7 45 31 f6 e8 49 9a
[153577.436040] RIP [<ffffffffc05cf970>] btrfs_orphan_add+0x1c0/0x1e0 [btrfs]
[153577.436040] RSP <ffff880104ae3c38>
[153577.700563] ---[ end trace 244f7d702830c31d ]---
** This bug has been marked a duplicate of bug 1450684
Btrfs freeze
** This bug is no longer a duplicate of bug 1450684
Btrfs freeze
** This bug has been marked a duplicate of bug 1413008
Kernel BUG shortly after mounting btrfs filesystem
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https://bugs.launchpad.net/bugs/1442884
Title:
kernel BUG at /build/buildd/linux-3.19.0/fs/btrfs/inode.c:3142!
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