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H A D | rsrc.c | 9ab2b084 Mon Nov 20 16:18:31 CST 2023 Keith Busch <kbusch@kernel.org> io_uring: fix off-by one bvec index
commit d6fef34ee4d102be448146f24caf96d7b4a05401 upstream.
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: bd11b3a391e3 ("io_uring: don't use iov_iter_advance() for fixed buffers") Signed-off-by: Keith Busch <kbusch@kernel.org> Link: https://lore.kernel.org/r/20231120221831.2646460-1-kbusch@meta.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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