From: Miklos Szeredi <mszeredi@redhat.com>

Date: Fri, 22 Oct 2021 17:03:03 +0200

Subject: fuse: fix attr version comparison in fuse_read_update_size()

Git-commit: 484ce65715b06aead8c4901f01ca32c5a240bc71

Patch-mainline: v5.16-rc1

References: bsc#1211807

A READ request returning a short count is taken as indication of EOF, and

the cached file size is modified accordingly.

Fix the attribute version checking to allow for changes to fc->attr_version

on other inodes.

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

Acked-by: Luís Henriques <lhenriques@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 c3fd88da2a0b..ddd563fda648 100644

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

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

@@ -787,7 +787,7 @@ static void fuse_read_update_size(struct inode *inode, loff_t size,

 	struct fuse_inode *fi = get_fuse_inode(inode);

 	spin_lock(&fi->lock);

-	if (attr_ver == fi->attr_version && size < inode->i_size &&

+	if (attr_ver >= fi->attr_version && size < inode->i_size &&

 	    !test_bit(FUSE_I_SIZE_UNSTABLE, &fi->state)) {

 		fi->attr_version = atomic64_inc_return(&fc->attr_version);

 		i_size_write(inode, size);