From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 25 Jul 2022 09:52:04 +0000 (+0100)
Subject: io_uring/net: checks errors of zc mem accounting
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2e32ba5607ee2b668baa8831dd74f7cc867a1f7e;p=linux.git

io_uring/net: checks errors of zc mem accounting

mm_account_pinned_pages() may fail, don't ignore the return value.

Fixes: e29e3bd4b968 ("io_uring: account locked pages for non-fixed zc")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/dae0542ed8e6706071bb83ad3e7ad6a70d207fd9.1658742118.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/net.c b/io_uring/net.c
index 62be89837d82b..8fb8469c3315b 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -985,7 +985,9 @@ int io_sendzc(struct io_kiocb *req, unsigned int issue_flags)
 					  &msg.msg_iter);
 		if (unlikely(ret))
 			return ret;
-		mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
+		ret = mm_account_pinned_pages(&notif->uarg.mmp, zc->len);
+		if (unlikely(ret))
+			return ret;
 	}
 
 	if (zc->addr) {