io_uring: allow iov_len = 0 for recvmsg and buffer select

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When using BUFFER_SELECT there is no technical requirement that the user
actually provides iov, and this removes one copy_from_user call.

So allow iov_len to be 0.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220630091231.1456789-4-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Dylan Yudaken 2022-06-30 02:12:22 -07:00 • committed by Jens Axboe

parent 32f3c434b1

commit 5702196e7d

1 changed files with 11 additions and 5 deletions

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io_uring/net.c

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