Public bug reported:
The kernel crashes when I boot the April 16, 2012 daily build of the
12.04 live CD on my tower computer.
It happens when running the installer. If I boot straight into the
installer ("Install Ubuntu") the screen simply freezes; if I boot into
the live CD then run the installer I get a text-mode kernel traceback.
The crash happens after pressing "Continue" after the second pane of the
install wizard (the pane offering "Download updates while installing"
and "Install the Fluendo MP3 decoder").
Manually transcribing some important-looking bits of the traceback:
----
kernel BUG at /build/buildd/linux-3.2.0/fs/btrfs/volumes.c:2650!
invalid opcode: 0000 [#1] SMP
CPU 2
...
Stack:
ffff880809188000 ffff88080bf2e580 0000000010000000 0000001e51c00000
fff88080918b400 0000000010000000 ff8807b4d88000 ffff880800000000
0000000010000000 0000000790900000 e400000000000001 ffff880809188000
Call trace:
[<ffffffffa02b2ace>] btrfs_alloc_chunk+0x8e/0xa0 [btrfs]
[<ffffffffa02b5253>] ? btrfs_queue_worker+0xe3/0x1e0 [btrfs]
[<ffffffffa0279460>] do_chunk_alloc+0x1b0/0x260 [btrfs]
[<ffffffffa0279f98>] find_free_extent.constprop.73+0xa88/0xb20 [btrfs]
[<ffffffffa027cf18>] btrfs_reserve_extent+0xe8/0x1f0 [btrfs]
[<ffffffff811170e0>] ? __lock_page+0x70/0x70
----
I've previously installed Ubuntu on this computer. (I'm reinstalling
because it's the only workaround I know for bug #975061.)
The computer has four active partitions: /, /boot, swap, and /home.
/boot is ext2 and on a small SATA SSD; all other partitions are btrfs
and on an OCZ PCIe RevoDrive. (There are additional unused partitions
on the RevoDrive.)
** Affects: ubuntu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/983653
Title:
Ubuntu 12.04 live CD crashes in btrfs_alloc_chunk
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