From 836b2fe544a5e9b5ce116622cb36fba33838c6fd Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 01:33:23 -0700 Subject: selftests/bpf: Check that JMP32 pointer vs zero jumps are not predicted Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which the verifier used to skip, contains an out of bounds map value access, hence w/o the previous patch the program is accepted. See previous patch for detailed description. Reported-by: Nicholas Carlini Suggested-by: Nicholas Carlini Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- tools/include/nolibc/math.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 tools/include/nolibc/math.h (limited to 'tools/include/nolibc/math.h') diff --git a/tools/include/nolibc/math.h b/tools/include/nolibc/math.h new file mode 100644 index 000000000..9df823ddd --- /dev/null +++ b/tools/include/nolibc/math.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ +/* + * math definitions for NOLIBC + * Copyright (C) 2025 Thomas Weißschuh + */ + +/* make sure to include all global symbols */ +#include "nolibc.h" + +#ifndef _NOLIBC_SYS_MATH_H +#define _NOLIBC_SYS_MATH_H + +static __inline__ +double fabs(double x) +{ + return x >= 0 ? x : -x; +} + +static __inline__ +float fabsf(float x) +{ + return x >= 0 ? x : -x; +} + +static __inline__ +long double fabsl(long double x) +{ + return x >= 0 ? x : -x; +} + +#endif /* _NOLIBC_SYS_MATH_H */ -- cgit v1.3.1