Comment 9 for bug 803685

Same happened here:

My machine suddenly started freezing once in a while spitting out the same kernel bug.
After a few reboots it started happening earlier and earlier, until the machine wasn't even bootable at all.

While from my Precise Beta2 Live-CD, at least the boot partition on my SSD drive was still mountable, it still wasn't possible to mount the btrfs root partition on the same drive.
Trying to mount the partition manually lead to a process infinitely running without any response which could not even be killed by "kill -9 #id".
Trying to auto-mount the partition via Dolphin (KDE) lead to the error message:
"An error occurred while accessing '79,5 GiB Hard Drive', the system responded: An unspecified error has occurred.: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken."

dmesg throws out:
[ 4.864120] device fsid f393d250-0c39-4896-8f8b-5d8c606e5af4 devid 1 transid 5350 /dev/sda5
[ 4.870568] Btrfs detected SSD devices, enabling SSD mode
[ 4.885361] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 4.885369] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 4.885372] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178008] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178016] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178019] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178021] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178023] parent transid verify failed on 54091776 wanted 5351 found 5331
[ 5.178040] ------------[ cut here ]------------
[ 5.178102] kernel BUG at /build/buildd/linux-3.2.0/fs/btrfs/tree-log.c:619!
[ 5.178190] invalid opcode: 0000 [#1] SMP
[ 5.178244] CPU 0
[ 5.178269] Modules linked in: dm_raid45 xor dm_mirror dm_region_hash dm_log btrfs zlib_deflate libcrc32c usb_storage radeon ttm drm_kms_helper usbhid hid pata_atiixp drm i2c_algo_bit wmi r8169
[ 5.178524]
[ 5.178544] Pid: 380, comm: exe Not tainted 3.2.0-20-generic #33-Ubuntu MICRO-STAR INTERNATIONAL CO.,LTD MS-7596/785GM-E65 (MS-7596)
[ 5.178702] RIP: 0010:[<ffffffffa0203302>] [<ffffffffa0203302>] replay_one_extent+0x562/0x570 [btrfs]
[ 5.178834] RSP: 0018:ffff8801185617f8 EFLAGS: 00010282
[ 5.178904] RAX: 00000000fffffffb RBX: ffff880117c5c000 RCX: 0000000000000115
[ 5.178992] RDX: 0000000000000114 RSI: 000060fee0001c20 RDI: ffffea00045dc340
[ 5.179080] RBP: ffff880118561908 R08: ffffffffa01b093a R09: 0000000000000000
[ 5.179172] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000072c69000
[ 5.179260] R13: ffff8801177340a0 R14: ffff880111c0ccd0 R15: ffff880118561966
[ 5.179349] FS: 00007f06c73fe700(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
[ 5.179453] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 5.179524] CR2: 00007fc5494bd000 CR3: 0000000112718000 CR4: 00000000000006f0
[ 5.179612] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 5.179704] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 5.179792] Process exe (pid: 380, threadinfo ffff880118560000, task ffff88011859c4d0)
[ 5.179890] Stack:
[ 5.179915] ffff880118561838 ffff880111c0d810 0000000000000065 ffff880118561ac0
[ 5.180036] 00000000021dd000 00000000021dd000 0000000000005000 ffff88011770d120
[ 5.180132] ffff880117732000 0000000000000002 0000000000000f7d ffff880118561858
[ 5.180228] Call Trace:
[ 5.180268] [<ffffffffa01f1b8a>] ? read_extent_buffer+0xea/0x180 [btrfs]
[ 5.180360] [<ffffffffa0203deb>] replay_one_buffer+0x26b/0x330 [btrfs]
[ 5.180449] [<ffffffffa01f0b74>] ? alloc_extent_buffer+0x74/0x410 [btrfs]
[ 5.180543] [<ffffffffa0200cca>] walk_down_log_tree+0x1ea/0x3b0 [btrfs]
[ 5.180634] [<ffffffffa020118d>] walk_log_tree+0xbd/0x1d0 [btrfs]
[ 5.180718] [<ffffffffa0204e61>] btrfs_recover_log_trees+0x211/0x300 [btrfs]
[ 5.180814] [<ffffffffa0203b80>] ? fixup_inode_link_counts+0x150/0x150 [btrfs]
[ 5.180912] [<ffffffffa01cf635>] open_ctree+0x14b5/0x1950 [btrfs]
[ 5.180992] [<ffffffff81315f84>] ? snprintf+0x34/0x40
[ 5.181062] [<ffffffffa021eba2>] btrfs_fill_super.isra.37+0x72/0x12c [btrfs]
[ 5.181151] [<ffffffff811e3f21>] ? disk_name+0x61/0xc0
[ 5.181216] [<ffffffff813135a7>] ? strlcpy+0x47/0x60
[ 5.181284] [<ffffffffa01ae897>] btrfs_mount+0x497/0x4e0 [btrfs]
[ 5.181361] [<ffffffff8117b603>] mount_fs+0x43/0x1b0
[ 5.181424] [<ffffffff81195e4a>] vfs_kern_mount+0x6a/0xc0
[ 5.181493] [<ffffffff81197354>] do_kern_mount+0x54/0x110
[ 5.181563] [<ffffffff81198ea4>] do_mount+0x1a4/0x260
[ 5.181628] [<ffffffff81199380>] sys_mount+0x90/0xe0
[ 5.181702] [<ffffffff81664502>] system_call_fastpath+0x16/0x1b
[ 5.181777] Code: 48 8b b5 40 ff ff ff 49 01 c4 4c 89 ef e8 b7 5c fe ff 49 8d 14 04 e9 41 fe ff ff b8 fb ff ff ff e9 43 fb ff ff 0f 0b 0f 0b 0f 0b <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 83 ec
[ 5.181820] RIP [<ffffffffa0203302>] replay_one_extent+0x562/0x570 [btrfs]
[ 5.181820] RSP <ffff8801185617f8>
[ 5.204117] ---[ end trace 7db0264b2b145c5d ]---

I will now try to boot from an older Live-CD.
If that doesn't work out, I will have to reformat my SSD drive and definitely won't try out btrfs again for quite some time.