io_uring: ensure recv and recvmsg handle MSG_WAITALL correctly
commit 7ba89d2af17aa879dda30f5d5d3f152e587fc551 upstream.
We currently don't attempt to get the full asked for length even if
MSG_WAITALL is set, if we get a partial receive. If we do see a partial
receive, then just note how many bytes we did and return -EAGAIN to
get it retried.
The iov is advanced appropriately for the vector based case, and we
manually bump the buffer and remainder for the non-vector case.
Cc: [email protected]
Reported-by: Constantine Gavrilov <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
1 file changed
