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 --- tools/perf/util/capstone.h | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 tools/perf/util/capstone.h (limited to 'tools/perf/util/capstone.h') diff --git a/tools/perf/util/capstone.h b/tools/perf/util/capstone.h new file mode 100644 index 000000000..7c0baaa01 --- /dev/null +++ b/tools/perf/util/capstone.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_CAPSTONE_H +#define __PERF_CAPSTONE_H + +#include +#include +#include +#include +#include +#include + +struct annotate_args; +struct machine; +struct symbol; +struct thread; + +#ifdef HAVE_LIBCAPSTONE_SUPPORT +ssize_t capstone__fprintf_insn_asm(struct machine *machine, struct thread *thread, u8 cpumode, + bool is64bit, const uint8_t *code, size_t code_size, + uint64_t ip, int *lenp, int print_opts, FILE *fp); +int symbol__disassemble_capstone(const char *filename, struct symbol *sym, + struct annotate_args *args); +int symbol__disassemble_capstone_powerpc(const char *filename, struct symbol *sym, + struct annotate_args *args); + +#else /* !HAVE_LIBCAPSTONE_SUPPORT */ +static inline ssize_t capstone__fprintf_insn_asm(struct machine *machine __maybe_unused, + struct thread *thread __maybe_unused, + u8 cpumode __maybe_unused, + bool is64bit __maybe_unused, + const uint8_t *code __maybe_unused, + size_t code_size __maybe_unused, + uint64_t ip __maybe_unused, + int *lenp __maybe_unused, + int print_opts __maybe_unused, + FILE *fp __maybe_unused) +{ + return -1; +} + +static inline int symbol__disassemble_capstone(const char *filename __maybe_unused, + struct symbol *sym __maybe_unused, + struct annotate_args *args __maybe_unused) +{ + return -1; +} + +static inline int symbol__disassemble_capstone_powerpc(const char *filename __maybe_unused, + struct symbol *sym __maybe_unused, + struct annotate_args *args __maybe_unused) +{ + return -1; +} + +#endif /* HAVE_LIBCAPSTONE_SUPPORT */ + +#endif /* __PERF_CAPSTONE_H */ -- cgit v1.3.1