From: Denis Efremov <efremov@linux.com>
Date: Fri, 5 Jun 2020 09:32:03 +0000 (+0300)
Subject: io_uring: use kvfree() in io_sqe_buffer_register()
X-Git-Tag: v5.6.19~100
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c106c81a0f6c5c18b344806041fed21470a5c5e5;p=thirdparty%2Fkernel%2Fstable.git

io_uring: use kvfree() in io_sqe_buffer_register()

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@linux.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200605093203.40087-1-efremov@linux.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index c6e1f76a6ee02..043421f60ea64 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6254,8 +6254,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, void __user *arg,
 
 		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,