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 --- include/asm-generic/simd.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 include/asm-generic/simd.h (limited to 'include/asm-generic/simd.h') diff --git a/include/asm-generic/simd.h b/include/asm-generic/simd.h new file mode 100644 index 000000000..70c8716ad --- /dev/null +++ b/include/asm-generic/simd.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_GENERIC_SIMD_H +#define _ASM_GENERIC_SIMD_H + +#include +#include +#include +#include + +/* + * may_use_simd - whether it is allowable at this time to issue SIMD + * instructions or access the SIMD register file + * + * As architectures typically don't preserve the SIMD register file when + * taking an interrupt, !in_interrupt() should be a reasonable default. + */ +static __must_check inline bool may_use_simd(void) +{ + return !in_interrupt(); +} + +#endif /* _ASM_GENERIC_SIMD_H */ -- cgit v1.3.1