[patch v8 3/7] nbd: check sock index in nbd_read_stat()

Yu Kuai
2021-09-16T09:24:08Z

The sock that clent send request in nbd_send_cmd() and receive reply
in nbd_read_stat() should be the same.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
drivers/block/nbd.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 614c6ab2b8fe..c724a5bd7fa4 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -746,6 +746,10 @@ static struct nbd_cmd *nbd_read_stat(struct nbd_device *nbd, int index)
ret = -ENOENT;
goto out;
}
+ if (cmd->index != index) {
+ dev_err(disk_to_dev(nbd->disk), "Unexpected reply %d from different sock %d (expected %d)",
+ tag, index, cmd->index);
+ }
if (cmd->cmd_cookie != nbd_handle_to_cookie(handle)) {
dev_err(disk_to_dev(nbd->disk), "Double reply on req %p, cmd_cookie %u, handle cookie %u\n",
req, cmd->cmd_cookie, nbd_handle_to_cookie(handle));
--
2.31.1