30.10.2023 10:38, Naohiro Aota wrote:
raw_co_zone_append() sets "s->offset" where "BDRVRawState *s". This pointer
is used later at raw_co_prw() to save the block address where the data is
written.

When multiple IOs are on-going at the same time, a later IO's
raw_co_zone_append() call over-writes a former IO's offset address before
raw_co_prw() completes. As a result, the former zone append IO returns the
initial value (= the start address of the writing zone), instead of the
proper address.

Fix the issue by passing the offset pointer to raw_co_prw() instead of
passing it through s->offset. Also, remove "offset" from BDRVRawState as
there is no usage anymore.

Fixes: 4751d09adcc3 ("block: introduce zone append write for zoned devices")
Signed-off-by: Naohiro Aota <naohiro.a...@wdc.com>

This smells like a -stable material. Please let me know if it is not.

Thanks,

/mjt

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