bcachefs: Initialize from_inode members for bch_io_opts

When there is no inode source, all "from_inode" members in the structure
bhc_io_opts should be set false.

Fixes: 7a7c43a ("bcachefs: Add bch_io_opts fields for indicating whether the opts came from the inode")
Reported-by: [email protected]
Closes: https://syzkaller.appspot.com/bug?extid=c17ad4b4367b72a853cb
Signed-off-by: Roxana Nicolescu <[email protected]>
Signed-off-by: Kent Overstreet <[email protected]>

Author: rnicolescusecond

fs/bcachefs/inode.c

@@ -1198,6 +1198,7 @@ void bch2_inode_opts_get(struct bch_io_opts *opts, struct bch_fs *c,
 		opts->_name##_from_inode = true;			\
 	} else {							\
 		opts->_name = c->opts._name;				\
+		opts->_name##_from_inode = false;			\
 	}
 	BCH_INODE_OPTS()
 #undef x