linux-kernel - [PATCH 5.6 062/161] io_uring: use kvfree() in io_sqe_buffer

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Message-Id: <20200616153109.331869762@linuxfoundation.org>
Date:   Tue, 16 Jun 2020 17:34:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Denis Efremov <efremov@...ux.com>,
        Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 5.6 062/161] io_uring: use kvfree() in io_sqe_buffer_register()

From: Denis Efremov <efremov@...ux.com>

commit a8c73c1a614f6da6c0b04c393f87447e28cb6de4 upstream.

Use kvfree() to free the pages and vmas, since they are allocated by
kvmalloc_array() in a loop.

Fixes: d4ef647510b1 ("io_uring: avoid page allocation warnings")
Signed-off-by: Denis Efremov <efremov@...ux.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20200605093203.40087-1-efremov@linux.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/io_uring.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6254,8 +6254,8 @@ static int io_sqe_buffer_register(struct
 
 		ret = 0;
 		if (!pages || nr_pages > got_pages) {
-			kfree(vmas);
-			kfree(pages);
+			kvfree(vmas);
+			kvfree(pages);
 			pages = kvmalloc_array(nr_pages, sizeof(struct page *),
 						GFP_KERNEL);
 			vmas = kvmalloc_array(nr_pages,