From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/md/dm-vdo/string-utils.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 drivers/md/dm-vdo/string-utils.h (limited to 'drivers/md/dm-vdo/string-utils.h') diff --git a/drivers/md/dm-vdo/string-utils.h b/drivers/md/dm-vdo/string-utils.h new file mode 100644 index 000000000..96eecd38b --- /dev/null +++ b/drivers/md/dm-vdo/string-utils.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright 2023 Red Hat + */ + +#ifndef VDO_STRING_UTILS_H +#define VDO_STRING_UTILS_H + +#include +#include + +/* Utilities related to string manipulation */ + +static inline const char *vdo_bool_to_string(bool value) +{ + return value ? "true" : "false"; +} + +/* Append a formatted string to the end of a buffer. */ +char *vdo_append_to_buffer(char *buffer, char *buf_end, const char *fmt, ...) + __printf(3, 4); + +#endif /* VDO_STRING_UTILS_H */ -- cgit v1.3.1