From: Pavel Begunkov asml.silence@gmail.com
commit 9c3a205c5ffa36e96903c2e37eb5f41c0f03c43e upstream.
iov_iter::type is a bitmask that also keeps direction etc., so it shouldn't be directly compared against ITER_*. Use proper helper.
Fixes: ff6165b2d7f6 ("io_uring: retain iov_iter state over io_read/io_write calls") Reported-by: David Howells dhowells@redhat.com Signed-off-by: Pavel Begunkov asml.silence@gmail.com Cc: stable@vger.kernel.org # 5.9 Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/io_uring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2991,7 +2991,7 @@ static void io_req_map_rw(struct io_kioc rw->free_iovec = NULL; rw->bytes_done = 0; /* can only be fixed buffers, no need to do anything */ - if (iter->type == ITER_BVEC) + if (iov_iter_is_bvec(iter)) return; if (!iovec) { unsigned iov_off = 0;