Fwd: [Bug 1039219] Re: btrfs-image: flush_pending: Assertion `!(!eb)` failed. Aborted. btrfsck also fails.

[Martin Pool]

Current Quantal's alternate image doesn't seem to have a btrfs on it.
(??)

If I try to mount that partition from Quantal, it fails with:

> BUG: Bad page state in process btrfs-cache-1 pn:2187fb
> page:ffffea000.... count:0 mapcount:0 mapping:ffff88021... index:0x36e9
> page flags: 0x2000...010c(referenced|uptodate|owner_priv_1)

That's kernel 3.5.0-14-generic #15-Ubuntu


-- 
Martin

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https://bugs.launchpad.net/bugs/1039219

Title:
  btrfs-image: flush_pending: Assertion `!(!eb)` failed. Aborted.
  btrfsck also fails.

Status in “btrfs-tools” package in Ubuntu:
  New

Bug description:
  I have a machine running Precise with a btrfs root filesystem.  It
  panicked the other day and now neither btrfsck or btrfs-image will
  run:

  # btrfs-image /dev/sdc2 /backup/grace/...
  checksum verify failed on 896765952 wanted 1d6bdc08 found 1931370
  checksum verify failed on 896765952 wanted 1d6bdc08 found 1931370
  checksum verify failed on 896765952 wanted 1d6bdc08 found 1931370
  btrfs-image: btrfs-image.c:394: flush_pending: Assertion `!(!eb)` failed.

  checksum verify failed on 896765952 wanted 1d6bdc08 found 26093d0
  checksum verify failed on 896765952 wanted 1d6bdc08 found 26093d0
  checksum verify failed on 896765952 wanted 1d6bdc08 found 26093d0
  fsck.btrfs[699]: segfault at b4 ip 000040f486 sp 00007fff8c803990 error 4 in btrfsck[4000000+1f000]
  Warning... fsck.btrfs for device /dev/sdc2 exited with signal 11.
  mountal: fsck / [697] terminated with status 8

  the oops was
  lookup_extent_backref
  __btrfs_free_extent
  run_delayed_tree_ref
  ...

  
  screenshots https://plus.google.com/photos/112646476239496153808/albums/5778858506731162865?hl=en

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