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Fri, 21 Aug 2020 13:02:01 -0700 (PDT) From: Arvind Sankar X-Google-Original-From: Arvind Sankar Date: Fri, 21 Aug 2020 16:01:59 -0400 To: Kees Cook Cc: Ingo Molnar , Catalin Marinas , Mark Rutland , Ard Biesheuvel , Peter Collingbourne , James Morse , Borislav Petkov , Ingo Molnar , Russell King , Masahiro Yamada , Arvind Sankar , Nick Desaulniers , Nathan Chancellor , Arnd Bergmann , x86@kernel.org, clang-built-linux@googlegroups.com, linux-arch@vger.kernel.org, linux-efi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 27/29] x86/boot/compressed: Remove, discard, or assert for unwanted sections Message-ID: <20200821200159.GC1475504@rani.riverdale.lan> References: <20200821194310.3089815-1-keescook@chromium.org> <20200821194310.3089815-28-keescook@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200821194310.3089815-28-keescook@chromium.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 21, 2020 at 12:43:08PM -0700, Kees Cook wrote: > In preparation for warning on orphan sections, stop the linker from > generating the .eh_frame* sections, discard unwanted non-zero-sized > generated sections, and enforce other expected-to-be-zero-sized sections > (since discarding them might hide problems with them suddenly gaining > unexpected entries). > > Signed-off-by: Kees Cook > .rel.dyn : { > - *(.rel.*) > + *(.rel.*) *(.rel_*) > } > ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!") > > .rela.dyn : { > - *(.rela.*) > + *(.rela.*) *(.rela_*) > } > ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!") > } > -- > 2.25.1 > When do you get .rela_?