Re: [bug report] fio failed with --fixedbufs

[Ming Lei <ming.lei@redhat.com>]

Hi Guangwu,

On Mon, Nov 11, 2024 at 03:20:22PM +0800, Guangwu Zhang wrote:
> Hi,
> 
> Get the fio error like below, please have a look if something wrong  here,
> can not reproduce it if remove "--fixedbufs".
> 
> Kernel repo: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
> Commit: 51b3526f50cf5526b73d06bd44a0f5e3f936fb01
> 

The issue should be fixed by the following patch:

diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index e7723759cb23..401c861ebc8e 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -221,6 +221,7 @@ int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
                struct io_ring_ctx *ctx = req->ctx;
                struct io_rsrc_node *node;

+               req->buf_index = READ_ONCE(sqe->buf_index);
                node = io_rsrc_node_lookup(&ctx->buf_table, req->buf_index);
                if (unlikely(!node))
                        return -EFAULT;



Thanks,
Ming