io_uring/rsrc: ensure segments counts are correct on kbuf buffers

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kbuf imports have the front offset adjusted and segments removed, but
the tail segments are still included in the segment count that gets
passed in the iov_iter. As the segments aren't necessarily all the
same size, move importing to a separate helper and iterate the
mapped length to get an exact count.

Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Jens Axboe 2025-04-16 16:48:26 -06:00

parent 80c7378f94

commit b419bed4f0

1 changed files with 22 additions and 5 deletions

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io_uring/rsrc.c

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