tree d2ee3d9491ab2b17551f099d9a6119407700dbd2
parent ed680c4ad478d0fee9740f7d029087f181346564
author Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1248771329 +0900
committer Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> 1249134512 +0900

nilfs2: fix oops due to inconsistent state in page with discrete b-tree nodes

Andrea Gelmini gave me a report that a kernel oops hit on a nilfs
filesystem with a 1KB block size when doing rsync.

This turned out to be caused by an inconsistency of dirty state
between a page and its buffers storing b-tree node blocks.

If the page had multiple buffers split over multiple logs, and if the
logs were written at a time, a dirty flag remained in the page even
every dirty flag in the buffers was cleared.

This will fix the failure by dropping the dirty flag properly for
pages with the discrete multiple b-tree nodes.

Reported-by: Andrea Gelmini <andrea.gelmini@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Tested-by: Andrea Gelmini <andrea.gelmini@gmail.com>
Cc: stable@kernel.org