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 --- 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