From: Sami Tolvanen <samitolvanen@google.com> To: linux-kernel@vger.kernel.org Cc: Kees Cook <keescook@chromium.org>, Josh Poimboeuf <jpoimboe@redhat.com>, Peter Zijlstra <peterz@infradead.org>, x86@kernel.org, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Joao Moreira <joao@overdrivepizza.com>, Sedat Dilek <sedat.dilek@gmail.com>, Steven Rostedt <rostedt@goodmis.org>, linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev, Sami Tolvanen <samitolvanen@google.com> Subject: [PATCH v5 02/22] scripts/kallsyms: Ignore __kcfi_typeid_ Date: Thu, 8 Sep 2022 14:54:44 -0700 [thread overview] Message-ID: <20220908215504.3686827-3-samitolvanen@google.com> (raw) In-Reply-To: <20220908215504.3686827-1-samitolvanen@google.com> The compiler generates __kcfi_typeid_ symbols for annotating assembly functions with type information. These are constants that can be referenced in assembly code and are resolved by the linker. Ignore them in kallsyms. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Nathan Chancellor <nathan@kernel.org> --- scripts/kallsyms.c | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index f18e6dfc68c5..ccdf0c897f31 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -119,6 +119,7 @@ static bool is_ignored_symbol(const char *name, char type) "__ThumbV7PILongThunk_", "__LA25Thunk_", /* mips lld */ "__microLA25Thunk_", + "__kcfi_typeid_", /* CFI type identifiers */ NULL }; -- 2.37.2.789.g6183377224-goog
WARNING: multiple messages have this Message-ID (diff)
From: Sami Tolvanen <samitolvanen@google.com> To: linux-kernel@vger.kernel.org Cc: Kees Cook <keescook@chromium.org>, Josh Poimboeuf <jpoimboe@redhat.com>, Peter Zijlstra <peterz@infradead.org>, x86@kernel.org, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com>, Joao Moreira <joao@overdrivepizza.com>, Sedat Dilek <sedat.dilek@gmail.com>, Steven Rostedt <rostedt@goodmis.org>, linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev, Sami Tolvanen <samitolvanen@google.com> Subject: [PATCH v5 02/22] scripts/kallsyms: Ignore __kcfi_typeid_ Date: Thu, 8 Sep 2022 14:54:44 -0700 [thread overview] Message-ID: <20220908215504.3686827-3-samitolvanen@google.com> (raw) In-Reply-To: <20220908215504.3686827-1-samitolvanen@google.com> The compiler generates __kcfi_typeid_ symbols for annotating assembly functions with type information. These are constants that can be referenced in assembly code and are resolved by the linker. Ignore them in kallsyms. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Nathan Chancellor <nathan@kernel.org> --- scripts/kallsyms.c | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c index f18e6dfc68c5..ccdf0c897f31 100644 --- a/scripts/kallsyms.c +++ b/scripts/kallsyms.c @@ -119,6 +119,7 @@ static bool is_ignored_symbol(const char *name, char type) "__ThumbV7PILongThunk_", "__LA25Thunk_", /* mips lld */ "__microLA25Thunk_", + "__kcfi_typeid_", /* CFI type identifiers */ NULL }; -- 2.37.2.789.g6183377224-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-09-08 21:55 UTC|newest] Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-09-08 21:54 [PATCH v5 00/22] KCFI support Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 01/22] treewide: Filter out CC_FLAGS_CFI Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen [this message] 2022-09-08 21:54 ` [PATCH v5 02/22] scripts/kallsyms: Ignore __kcfi_typeid_ Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 03/22] cfi: Remove CONFIG_CFI_CLANG_SHADOW Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 04/22] cfi: Drop __CFI_ADDRESSABLE Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 05/22] cfi: Switch to -fsanitize=kcfi Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 06/22] cfi: Add type helper macros Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 07/22] lkdtm: Emit an indirect call for CFI tests Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 08/22] psci: Fix the function type for psci_initcall_t Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 09/22] arm64: Add types to indirect called assembly functions Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 10/22] arm64: Add CFI error handling Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 11/22] arm64: Drop unneeded __nocfi attributes Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 12/22] init: Drop __nocfi from __init Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 13/22] treewide: Drop function_nocfi Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 14/22] treewide: Drop WARN_ON_FUNCTION_MISMATCH Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 15/22] treewide: Drop __cficanonical Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 16/22] objtool: Preserve special st_shndx indexes in elf_update_symbol Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:54 ` [PATCH v5 17/22] objtool: Disable CFI warnings Sami Tolvanen 2022-09-08 21:54 ` Sami Tolvanen 2022-09-08 21:55 ` [PATCH v5 18/22] kallsyms: Drop CONFIG_CFI_CLANG workarounds Sami Tolvanen 2022-09-08 21:55 ` Sami Tolvanen 2022-09-08 21:55 ` [PATCH v5 19/22] x86/tools/relocs: Ignore __kcfi_typeid_ relocations Sami Tolvanen 2022-09-08 21:55 ` Sami Tolvanen 2022-09-08 21:55 ` [PATCH v5 20/22] x86: Add types to indirectly called assembly functions Sami Tolvanen 2022-09-08 21:55 ` Sami Tolvanen 2022-09-08 21:55 ` [PATCH v5 21/22] x86/purgatory: Disable CFI Sami Tolvanen 2022-09-08 21:55 ` Sami Tolvanen 2022-09-08 21:55 ` [PATCH v5 22/22] x86: Add support for CONFIG_CFI_CLANG Sami Tolvanen 2022-09-08 21:55 ` Sami Tolvanen 2022-09-26 12:39 ` [PATCH v5 00/22] KCFI support Peter Zijlstra 2022-09-26 12:39 ` Peter Zijlstra 2022-09-26 20:16 ` H.J. Lu 2022-09-26 20:16 ` H.J. Lu 2022-09-27 7:29 ` Peter Zijlstra 2022-09-27 7:29 ` Peter Zijlstra 2022-09-26 17:20 ` Kees Cook 2022-09-26 17:20 ` Kees Cook 2022-09-28 9:01 ` Sedat Dilek 2022-09-28 9:01 ` Sedat Dilek
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