6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jens Axboe <axboe@xxxxxxxxx>
commit 8fe8ac24adcd76b12edbfdefa078567bfff117d4 upstream.
If a send is issued marked with IOSQE_BUFFER_SELECT for selecting a
buffer, unless it's a bundle, it should not select multiple buffers.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: a05d1f625c7a ("io_uring/net: support bundles for send")
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/net.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -591,17 +591,18 @@ retry_bundle:
.iovs = &kmsg->fast_iov,
.max_len = INT_MAX,
.nr_iovs = 1,
- .mode = KBUF_MODE_EXPAND,
};
if (kmsg->free_iov) {
arg.nr_iovs = kmsg->free_iov_nr;
arg.iovs = kmsg->free_iov;
- arg.mode |= KBUF_MODE_FREE;
+ arg.mode = KBUF_MODE_FREE;
}
if (!(sr->flags & IORING_RECVSEND_BUNDLE))
arg.nr_iovs = 1;
+ else
+ arg.mode |= KBUF_MODE_EXPAND;
ret = io_buffers_select(req, &arg, issue_flags);
if (unlikely(ret < 0))
