From: Xie Yongji <xieyongji@bytedance.com>

Date: Mon, 22 Nov 2021 17:05:31 +0800

Subject: fuse: Pass correct lend value to filemap_write_and_wait_range()

Git-commit: e388164ea385f04666c4633f5dc4f951fca71890

Patch-mainline: v5.16 or v5.16-rc9 (next release)

References: bsc#1194953

The acceptable maximum value of lend parameter in

filemap_write_and_wait_range() is LLONG_MAX rather than -1. And there is

also some logic depending on LLONG_MAX check in write_cache_pages(). So

let's pass LLONG_MAX to filemap_write_and_wait_range() in

fuse_writeback_range() instead.

Fixes: 59bda8ecee2f ("fuse: flush extending writes")

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>

Cc: <stable@vger.kernel.org> # v5.15

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Acked-by: Luis Henriques <lhenriques@suse.com>

---

 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 9d6c5f6361f7..df81768c81a7 100644

--- a/fs/fuse/file.c

+++ b/fs/fuse/file.c

@@ -2910,7 +2910,7 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter)

 static int fuse_writeback_range(struct inode *inode, loff_t start, loff_t end)

 {

-	int err = filemap_write_and_wait_range(inode->i_mapping, start, -1);

+	int err = filemap_write_and_wait_range(inode->i_mapping, start, LLONG_MAX);

 	if (!err)

 		fuse_sync_writes(inode);