FAILED: patch "[PATCH] io_uring: fix poll error reporting" failed to apply to 5.17-stable tree

The patch below does not apply to the 5.17-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 7179c3ce3dbff646c55f7cd664a895f462f049e5 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <[email protected]>
Date: Wed, 13 Apr 2022 16:10:35 +0100
Subject: [PATCH] io_uring: fix poll error reporting

We should not return an error code in req->result in io_poll_check_events(), because it may get mangled and returned as success. Just return the error code directly, the callers will fail the request or proceed accordingly.

index d06f1952fdfa..ab674a0d269b 100644
@@ -5861,9 +5861,8 @@ static int io_poll_check_events(struct io_kiocb *req, bool locked)
 			unsigned flags = locked ? 0 : IO_URING_F_UNLOCKED;
 
 			if (unlikely(!io_assign_file(req, flags)))
-				req->result = -EBADF;
-			else
-				req->result = vfs_poll(req->file, &pt) & req->apoll_events;
+				return -EBADF;
+			req->result = vfs_poll(req->file, &pt) & req->apoll_events;
 		}
 
 		/* multishot, just fill an CQE and proceed */