vfs: fix readlinkat to retry on ESTALE (7955119e) · Commits · e / devices / android_kernel_teracube_mt6765

fs/stat.c

+7 −1

Original line number	Original line	Diff line number	Diff line
	@@ -300,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
	struct path path;		struct path path;
	int error;		int error;
	int empty = 0;		int empty = 0;
			unsigned int lookup_flags = LOOKUP_EMPTY;

	if (bufsiz <= 0)		if (bufsiz <= 0)
	return -EINVAL;		return -EINVAL;

	error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty);		retry:
			error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty);
	if (!error) {		if (!error) {
	struct inode *inode = path.dentry->d_inode;		struct inode *inode = path.dentry->d_inode;

	@@ -318,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
	}		}
	}		}
	path_put(&path);		path_put(&path);
			if (retry_estale(error, lookup_flags)) {
			lookup_flags \|= LOOKUP_REVAL;
			goto retry;
			}
	}		}
	return error;		return error;
	}		}