From 9de5be06d0a89ca97b5ab902694d42dfd2bb77d2 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <mszeredi@redhat.com>
Date: Wed, 24 Apr 2019 17:05:06 +0200
Subject: [PATCH] fuse: fix writepages on 32bit
Git-commit: 9de5be06d0a89ca97b5ab902694d42dfd2bb77d2
Patch-mainline: v5.2-rc1
References: bsc#1051510
Writepage requests were cropped to i_size & 0xffffffff, which meant that
mmaped writes to any file larger than 4G might be silently discarded.
Fix by storing the file size in a properly sized variable (loff_t instead
of size_t).
Reported-by: Antonio SJ Musumeci <trapexit@spawn.link>
Fixes: 6eaf4782eb09 ("fuse: writepages: crop secondary requests")
Cc: <stable@vger.kernel.org> # v3.13
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
fs/fuse/file.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 06096b60f1df..5428c81879b2 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1586,7 +1586,7 @@ __acquires(fi->lock)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
- size_t crop = i_size_read(inode);
+ loff_t crop = i_size_read(inode);
struct fuse_req *req;
while (fi->writectr >= 0 && !list_empty(&fi->queued_writes)) {
--
2.16.4