From 336d28a8f38013a069f2d46e73aaa1880ef17a47 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue, 6 Sep 2022 17:11:17 +0100
Subject: [PATCH] io_uring: recycle kbuf recycle on tw requeue
Git-commit: 336d28a8f38013a069f2d46e73aaa1880ef17a47
Patch-mainline: v6.0-rc5
References: git-fixes
When we queue a request via tw for execution it's not going to be
executed immediately, so when io_queue_async() hits IO_APOLL_READY
and queues a tw but doesn't try to recycle/consume the buffer some other
request may try to use the the buffer.
Fixes: c7fb19428d67 ("io_uring: add support for ring mapped supplied buffers")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/a19bc9e211e3184215a58e129b62f440180e9212.1662480490.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel krisman Bertazi <krisman@suse.de>
---
fs/io_uring.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8307,6 +8307,7 @@ static void io_queue_async(struct io_kio
switch (io_arm_poll_handler(req, 0)) {
case IO_APOLL_READY:
+ io_kbuf_recycle(req, 0);
io_req_task_queue(req);
break;
case IO_APOLL_ABORTED: