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/base/trace.c | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 drivers/base/trace.c (limited to 'drivers/base/trace.c') diff --git a/drivers/base/trace.c b/drivers/base/trace.c new file mode 100644 index 000000000..b24b0a309 --- /dev/null +++ b/drivers/base/trace.c @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Device core Trace Support + * Copyright (C) 2021, Intel Corporation + * + * Author: Andy Shevchenko + */ + +#define CREATE_TRACE_POINTS +#include "trace.h" -- cgit v1.3.1