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Keith Busch authored
If the offset equals the bv_len of the first registered bvec, then the
request does not include any of that first bvec. Skip it so that drivers
don't have to deal with a zero length bvec, which was observed to break
NVMe's PRP list creation.

Cc: stable@vger.kernel.org
Fixes: bd11b3a3 ("io_uring: don't use iov_iter_advance() for fixed buffers")
Signed-off-by: default avatarKeith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20231120221831.2646460-1-kbusch@meta.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
d6fef34e
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