io_uring/kbuf: cap buffer selection length at MAX_RW_COUNT

io_ring_buffers_peek() builds an iovec array from provided buffers, and
that in turn can be handed off to a lower level provider. Be prudent and
cap the total size to MAX_RW_COUNT, which is the Linux default for how
much IO do to in a single call.

No bugs here, but it's a good preventative measure to avoid truncation
issues.

Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

0 files changed, 0 insertions, 0 deletions