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From: Pavel Begunkov <asml.silence@gmail.com>
To: io-uring@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>, asml.silence@gmail.com
Subject: [PATCH 1/1] io_uring/net: fix cleanup after recycle
Date: Mon, 19 Dec 2022 15:11:40 +0000	[thread overview]
Message-ID: <9e326f4ad4046ddadf15bf34bf3fa58c6372f6b5.1671461985.git.asml.silence@gmail.com> (raw)

Don't access io_async_msghdr io_netmsg_recycle(), it may be reallocated.

Cc: stable@vger.kernel.org
Fixes: 9bb66906f23e5 ("io_uring: support multishot in recvmsg")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 io_uring/net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/io_uring/net.c b/io_uring/net.c
index 5229976cb582..7395b2c99f86 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -819,10 +819,10 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
 		goto retry_multishot;
 
 	if (mshot_finished) {
-		io_netmsg_recycle(req, issue_flags);
 		/* fast path, check for non-NULL to avoid function call */
 		if (kmsg->free_iov)
 			kfree(kmsg->free_iov);
+		io_netmsg_recycle(req, issue_flags);
 		req->flags &= ~REQ_F_NEED_CLEANUP;
 	}
 
-- 
2.38.1


             reply	other threads:[~2022-12-19 15:12 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-19 15:11 Pavel Begunkov [this message]
2022-12-19 17:00 [PATCH 1/1] io_uring/net: fix cleanup after recycle Jens Axboe

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