From f6598346ec3928620b4f94bcd91dfe0d3fe6c336 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 22 Oct 2021 17:03:03 +0200 Subject: [PATCH] UPSTREAM: fuse: fix attr version comparison in fuse_read_update_size() commit 484ce65715b06aead8c4901f01ca32c5a240bc71 upstream. 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. Change-Id: I03143ae182ed264aea806a02c5ff4edf0ae28239 Signed-off-by: Miklos Szeredi Signed-off-by: Yang Bo Signed-off-by: Greg Kroah-Hartman --- 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 04fd62f4562f..fea39e0b037c 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -836,7 +836,7 @@ 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);