From: Mike Rapoport (Microsoft) <rppt@kernel.org>
Date: Sat, 23 May 2026 17:54:24 +0000 (+0300)
Subject: fuse: replace __get_free_page() with kmalloc()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3db329857c6003bfd0a6cc61d01e0b750fe5d32c;p=thirdparty%2Fkernel%2Flinux.git

fuse: replace __get_free_page() with kmalloc()

fuse_do_ioctl allocates memory for struct iov array using
__get_free_page().

kmalloc() is a better API for such use and it also provides better
scalability and more debugging possibilities.

Replace use of __get_free_page() with kmalloc().

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260523-b4-fs-v1-12-275e36a83f0e@kernel.org
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---

diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c
index fdc175e93f747..3614ea6039139 100644
--- a/fs/fuse/ioctl.c
+++ b/fs/fuse/ioctl.c
@@ -10,6 +10,7 @@
 #include <linux/fileattr.h>
 #include <linux/fsverity.h>
 
+#include <linux/slab.h>
 #define FUSE_VERITY_ENABLE_ARG_MAX_PAGES 256
 
 static ssize_t fuse_send_ioctl(struct fuse_mount *fm, struct fuse_args *args,
@@ -252,7 +253,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
 
 	err = -ENOMEM;
 	ap.folios = fuse_folios_alloc(fm->fc->max_pages, GFP_KERNEL, &ap.descs);
-	iov_page = (struct iovec *) __get_free_page(GFP_KERNEL);
+	iov_page = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!ap.folios || !iov_page)
 		goto out;
 
@@ -400,7 +401,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
 	}
 	err = 0;
  out:
-	free_page((unsigned long) iov_page);
+	kfree(iov_page);
 	while (ap.num_folios)
 		folio_put(ap.folios[--ap.num_folios]);
 	kfree(ap.folios);