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/perf/util/libbfd.h | 82 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 tools/perf/util/libbfd.h (limited to 'tools/perf/util/libbfd.h') diff --git a/tools/perf/util/libbfd.h b/tools/perf/util/libbfd.h new file mode 100644 index 000000000..953886f3d --- /dev/null +++ b/tools/perf/util/libbfd.h @@ -0,0 +1,82 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_LIBBFD_H +#define __PERF_LIBBFD_H + +#include +#include +#include +#include + +struct annotate_args; +struct build_id; +struct dso; +struct inline_node; +struct symbol; + +#ifdef HAVE_LIBBFD_SUPPORT +int libbfd__addr2line(const char *dso_name, u64 addr, + char **file, unsigned int *line, struct dso *dso, + bool unwind_inlines, struct inline_node *node, + struct symbol *sym); + + +void dso__free_a2l_libbfd(struct dso *dso); + +int symbol__disassemble_libbfd(const char *filename, struct symbol *sym, + struct annotate_args *args); + +int libbfd__read_build_id(const char *filename, struct build_id *bid); + +int libbfd_filename__read_debuglink(const char *filename, char *debuglink, size_t size); + +int symbol__disassemble_bpf_libbfd(struct symbol *sym, struct annotate_args *args); + +#else // !defined(HAVE_LIBBFD_SUPPORT) +#include "annotate.h" + +static inline int libbfd__addr2line(const char *dso_name __always_unused, + u64 addr __always_unused, + char **file __always_unused, + unsigned int *line __always_unused, + struct dso *dso __always_unused, + bool unwind_inlines __always_unused, + struct inline_node *node __always_unused, + struct symbol *sym __always_unused) +{ + return -1; +} + + +static inline void dso__free_a2l_libbfd(struct dso *dso __always_unused) +{ +} + +static inline int symbol__disassemble_libbfd(const char *filename __always_unused, + struct symbol *sym __always_unused, + struct annotate_args *args __always_unused) +{ + return -1; +} + +static inline int libbfd__read_build_id(const char *filename __always_unused, + struct build_id *bid __always_unused) +{ + return -1; +} + +static inline int libbfd_filename__read_debuglink(const char *filename __always_unused, + char *debuglink __always_unused, + size_t size __always_unused) +{ + return -1; +} + +static inline int symbol__disassemble_bpf_libbfd(struct symbol *sym __always_unused, + struct annotate_args *args __always_unused) +{ + return SYMBOL_ANNOTATE_ERRNO__NO_LIBOPCODES_FOR_BPF; +} + +#endif // defined(HAVE_LIBBFD_SUPPORT) + +#endif /* __PERF_LIBBFD_H */ -- cgit v1.3.1