From patchwork Tue Aug 30 23:31:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12960113 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 209DDECAAA1 for ; Tue, 30 Aug 2022 23:31:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231602AbiH3Xbx (ORCPT ); Tue, 30 Aug 2022 19:31:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42116 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231358AbiH3Xbu (ORCPT ); Tue, 30 Aug 2022 19:31:50 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 245D472EC1 for ; Tue, 30 Aug 2022 16:31:39 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-33e1114437fso190869017b3.19 for ; Tue, 30 Aug 2022 16:31:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:from:to:cc:subject:date; bh=V3t6t7JIbAvSA8Tk+dwJ0EP+zKfoVcWxCLBhZzDbf1s=; b=BJZRO63b+6qTZ95mYkmggV5gs8KD4EmwXqxKHDYQCmIwLDm3YgniZ/250yz/gIN1o1 UDhgouP28HoSfLMlxUzyUrie3RqWCd1jAJOvkD9cnYfXcC653F8P+perCbezg0NqrJNk fMkszVMmG821mLizP9xbJci3/UVQzvsFSAjQusVLzxh/dfx2EtyYJL4EkRKZB8oJo5BX YIgzdRMqwTd/pdX/aPujuGXBfS+1cow9p06p/eOjzy5gj+RcIfTa6TkVDGBQaIaT8OMp TFBlAR0jRBgRhyDixp6R7SlS1vciR3OouPWVAX03TeXSLEtbzJZVJS5goMVzv3JfQDBu ZFqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:references:mime-version:message-id:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=V3t6t7JIbAvSA8Tk+dwJ0EP+zKfoVcWxCLBhZzDbf1s=; b=KQ/339KNlcbj/BD5FkUBcewnMj03viw7WtUs1xkvC7LhSRGs2aVPa/AeFpSO5ETTRs I1ROr/nm5IbZDSEk+1LDwfiHIO/iuA9HTgiMQ0w3fTDcvi9GXFT2/GIXUy9pCErPtgdb lF5+zMP5B6k/PKE6m/7XGWQkCAp2/otHgViCueGutjcR6wtJI7mlI3aUUwsMRr8L4jrR 86THAyuBTwpB92tltacP1po57FZKEyzsXybzuS8iAZsCEOgsNpoFuqFfa9tTeZYNEFnW 2OtZvbzlyMKCq6ck9YTDRkDopnzUgyYzC+HZONXhjlLiPo6rY+sMiJ7PPZtTHxnGB98w +PFA== X-Gm-Message-State: ACgBeo20owWw4RhZD7t84XjdxE88H21oetdVTL54ZRUwQKgTiFabtcyH BLCn+CpEjIFXBE+a6EmCSlXOxU4hhthzzpoYQdM= X-Google-Smtp-Source: AA6agR6LXRk/vsm3io9GudAaANlg3qlqmbPfZYO/5+9wavftY3qTlNqavlUs2mptfr8JHyP3G7J0i2tYgLtM61K8Nyw= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:54d9:7143:6a7d:91d]) (user=samitolvanen job=sendgmr) by 2002:a5b:3ca:0:b0:676:e468:2879 with SMTP id t10-20020a5b03ca000000b00676e4682879mr14158623ybp.239.1661902298407; Tue, 30 Aug 2022 16:31:38 -0700 (PDT) Date: Tue, 30 Aug 2022 16:31:10 -0700 In-Reply-To: <20220830233129.30610-1-samitolvanen@google.com> Message-Id: <20220830233129.30610-3-samitolvanen@google.com> Mime-Version: 1.0 References: <20220830233129.30610-1-samitolvanen@google.com> X-Developer-Key: i=samitolvanen@google.com; a=openpgp; fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=815; i=samitolvanen@google.com; h=from:subject; bh=ZsdbFV1rDPVMEEnz8gpkcJ4SEVi2nPPUZtGW8C9VlOE=; b=owEB7QES/pANAwAKAUy19oSLvFbuAcsmYgBjDp3LuiRNOIXF6iWJdViGqd3zv5mS4LojAiJ+2zw1 RBe4TiiJAbMEAAEKAB0WIQQ1zPtjsoPW0663g5RMtfaEi7xW7gUCYw6dywAKCRBMtfaEi7xW7hbdC/ 9dH+eF9FLRfbAZmIKkZfKGLDEV4GpzyFt3DC0T+XPYawpv8d4hIHcmWOewSokNp8/RlQxEqhucG9Zn axIaqhwCi2QhLKvRZcwmhKgvB25LWwrp6pMh94YrnGXvlD4ZGovDQk7afANRYpvaJuBWvNDjJMfcM9 IMHPn/dIoby0cmKnGFT9OKty5s0M6RvrxxqzZZEVxwms885iZiHHnH1gSB2c5RlKNgSxrpvfzr6gB5 VgzIUn3LcrpQ9eYEcaYRquZJotPXSZwdymKNF+l7zsSqZZzMkyXcLEY8JSPcDyhYBdFlHyA9oq+hqf FOCm74Um/Gr8A1LV7ognHe7JEPGjOh7sx3AJcXUtyPCn7FtdZU2V/f+thDRCL7FfgnF9UDZs0DMpqq PT0C1GB58hHVS0/Y/twOGM7f//NBSc140Y0yOTXRWtQuwHvAzfA6mSE55KlboU2m6pMC8JKeSW7PsL +uWT5s6GcBEfGDclqFu6GC1EpRCfJ/6w0iOUYXTCADGSE= X-Mailer: git-send-email 2.37.2.672.g94769d06f0-goog Subject: [PATCH v4 02/21] scripts/kallsyms: Ignore __kcfi_typeid_ From: Sami Tolvanen To: linux-kernel@vger.kernel.org Cc: Kees Cook , Josh Poimboeuf , Peter Zijlstra , x86@kernel.org, Catalin Marinas , Will Deacon , Mark Rutland , Nathan Chancellor , Nick Desaulniers , Joao Moreira , Sedat Dilek , Steven Rostedt , linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org 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 Reviewed-by: Kees Cook --- 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 };