| 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: fuse: fix writepages on 32bit |
| |
| From: Miklos Szeredi <mszeredi@redhat.com> |
| |
| commit 9de5be06d0a89ca97b5ab902694d42dfd2bb77d2 upstream. |
| |
| 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> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| fs/fuse/file.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/fs/fuse/file.c |
| +++ b/fs/fuse/file.c |
| @@ -1521,7 +1521,7 @@ __acquires(fc->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)) { |
