On Mon, Dec 02, 2019 at 11:01:03AM +0000, fdmanana@xxxxxxxxxx wrote:
> From: Filipe Manana <fdmanana@xxxxxxxx>
>
> Having checksum items, either on the checksums tree or in a log tree, that
> represent ranges that overlap each other is a sign of a corruption. Such
> case confuses the checksum lookup code and can result in not being able to
> find checksums or find stale checksums.
>
> So add a check for such case.
>
> This is motivated by a recent fix for a case where a log tree had checksum
> items covering ranges that overlap each other due to extent cloning, and
> resulted in missing checksums after replaying the log tree. It also helps
> detect past issues such as stale and outdated checksums due to overlapping,
> commit 27b9a8122ff71a ("Btrfs: fix csum tree corruption, duplicate and
> outdated checksums").
>
> Signed-off-by: Filipe Manana <fdmanana@xxxxxxxx>
Added to misc-next, thanks.
