[Devel] [PATCH hci-8.1 3/3] drivers/md/dm-qcow2: do not revalidate inconsistent persistent bitmaps

Konstantin Khorenko khorenko at virtuozzo.com
Thu Oct 29 14:39:02 MSK 2026


> Keep the bitmaps bit only if it is set in the image.

Please add

Fixes: f913aa3f7a1d4 ("dm-qcow2: parse bitmap extension")

That commit replaced the raw read of autoclear_features with the
zero-then-set logic, so it is where a clear on-disk bit started to be
set again.

On the Sashiko thread: agreed with your reply, nothing to change here.
The driver does not check header_length >= 104 for v3 the way qemu
does; that is a separate one-liner, not for this series.

--
Best regards,

Konstantin Khorenko,
Virtuozzo Linux Kernel Team




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