Commit 9de5be06 authored Apr 24, 2019 by Miklos Szeredi

fuse: fix writepages on 32bit



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: 6eaf4782 ("fuse: writepages: crop secondary requests")
Cc: <stable@vger.kernel.org> # v3.13
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

parent 085b7755

fs/fuse/file.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)) {

Admin message