[PATCH U-BOOT v2 0/3] fs: btrfs: Fix false LZO decompression error due to missing page boundary check

Qu Wenruo wqu at suse.com
Thu Mar 26 06:35:53 CET 2020

There is a bug that uboot can't load LZO compressed data extent while
kernel can handle it without any problem.

It turns out to be a page boundary case. The 3nd patch is the proper
fix, cross-ported from btrfs-progs.

The first patch is just to make my eyes less hurt.
The second patch is to make sure the driver will reject sector size not
matching PAGE_SIZE.
This keeps the behavior the same as kernel, even in theory we could do
better in U-boot. This is just a temporary fix, before better btrfs
driver implemented.

I guess it's time to backport proper code from btrfs-progs, other than
using tons of immediate codes.

- Fix code style problems
- Add a new patch to reject non-page-sized sector size
  Since kernel does the same thing, and non-4K page size u-boot boards
  are really rare, it shouldn't be a big problem.

Qu Wenruo (3):
  fs: btrfs: Use LZO_LEN to replace immediate number
  fs: btrfs: Reject fs with sector size other than PAGE_SIZE
  fs: btrfs: Fix LZO false decompression error caused by pending zero

 fs/btrfs/compression.c | 42 +++++++++++++++++++++++++++++++-----------
 fs/btrfs/super.c       |  8 ++++++++
 2 files changed, 39 insertions(+), 11 deletions(-)


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