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 --- arch/arm/lib/testsetbit.S | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 arch/arm/lib/testsetbit.S (limited to 'arch/arm/lib/testsetbit.S') diff --git a/arch/arm/lib/testsetbit.S b/arch/arm/lib/testsetbit.S new file mode 100644 index 000000000..649dbab65 --- /dev/null +++ b/arch/arm/lib/testsetbit.S @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/lib/testsetbit.S + * + * Copyright (C) 1995-1996 Russell King + */ +#include +#include +#include "bitops.h" + .text + +testop _test_and_set_bit, orreq, streq + +#if __LINUX_ARM_ARCH__ >= 6 +sync_testop _sync_test_and_set_bit, orreq, streq +#endif -- cgit v1.3.1