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/permassert.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 drivers/md/dm-vdo/permassert.c (limited to 'drivers/md/dm-vdo/permassert.c') diff --git a/drivers/md/dm-vdo/permassert.c b/drivers/md/dm-vdo/permassert.c new file mode 100644 index 000000000..bf9eccea1 --- /dev/null +++ b/drivers/md/dm-vdo/permassert.c @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2023 Red Hat + */ + +#include "permassert.h" + +#include "errors.h" +#include "logger.h" + +int vdo_assertion_failed(const char *expression_string, const char *file_name, + int line_number, const char *format, ...) +{ + va_list args; + + va_start(args, format); + + vdo_log_embedded_message(VDO_LOG_ERR, VDO_LOGGING_MODULE_NAME, "assertion \"", + format, args, "\" (%s) failed at %s:%d", + expression_string, file_name, line_number); + vdo_log_backtrace(VDO_LOG_ERR); + + va_end(args); + + return UDS_ASSERTION_FAILED; +} -- cgit v1.3.1