From nobody Sun Feb 8 17:36:26 2026 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 8D027C38145 for ; Thu, 8 Sep 2022 21:57:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230311AbiIHV5h (ORCPT ); Thu, 8 Sep 2022 17:57:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230215AbiIHV4s (ORCPT ); Thu, 8 Sep 2022 17:56:48 -0400 Received: from mail-pg1-x549.google.com (mail-pg1-x549.google.com [IPv6:2607:f8b0:4864:20::549]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11AF212C4AC for ; Thu, 8 Sep 2022 14:55:55 -0700 (PDT) Received: by mail-pg1-x549.google.com with SMTP id 136-20020a63008e000000b0042d707c94fbso9720933pga.9 for ; Thu, 08 Sep 2022 14:55:55 -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=vm5veKXR+O2rRgDax5LpSkLTaTy6Og98Noar0uvmDBg=; b=ZH4pBF7GcHnWh2rdS1M78dhaZ11K8L+Sgzed6KJoRLi3j8jXB817lSxBYasnKxh35l ZgnZlL9KZKdVv/EEmU4Tr+fZQkPdIzGmxpc5X5xhaFXzDlmMeZThq26jacwbWTgmbIt+ mEOWKEGQf60wrEwM3JZDw9Jzp39hksE1mVbxmtBIAb5U04hNo0rDQzSQy3qp0ANVY3Nx mKwCjtrn4M5SR6N3Ntr0p4SQUb7v7l9CLXjBfW3uSHAXgNiORV7YYLQU3pmYbuhWBylE YBOxayLfIlv8bl+W/GJkrVOltIx+Nqz+DUXVpTpgY3U82wYjYp/kQseaYZQPRushhMm5 TAOw== 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=vm5veKXR+O2rRgDax5LpSkLTaTy6Og98Noar0uvmDBg=; b=Lb9EPQnAOHQ2NwsWpGV7/hzsbEyRz+2V8DPWNKd+RnI0KBHaPbpuSu/Q1dvTtx2O2X sg61F8ty45y3iu38aw4RA9iplp0WNXKlQ+TVPaf0UpkdcScT6o2xnyBZTZQPvVRPMbbp UB7VYVc5D4VXzHsiyuChSm0M8Lh2o8NrFa3s24aF1zHensx2lF+r8jE20dN/MFcPmQDw oFOMsptrY5QcWERJ55kKXe4r1E3WuHKjuaJ05MOBVfsSLcUnWd14H5SeGsNAeLYV+i9G kjkpzm33YuF5o0OaooALRVK0aSUTzW6+zhhN4qRn+95gdaG+HVycwIAgH30kkjKkrbMO Ue6w== X-Gm-Message-State: ACgBeo13uQtYyIv602IOxaloud4PBQ0/MQuM1XbXBvnKprviET6CNvXB N1IqoWKEzD2omP3Ln6/THIQvBxvF5U9H3MXIwE2FVv+XgHtu/2K/xHv3pX3NROV9Xm7hZ9a3PNe lRXhsHmow2YubgRT1348tmo6jyVgm6Rh5qUq+BpD+iUCaeYrnpduet7nnLcZeXJU/K0p3zTUtDf rXjcoYPmU8Cg== X-Google-Smtp-Source: AA6agR5WnOKxTdr/25i3BNZh8IUmQ/bEKkkDvPQH35RzmIpWPpUdr+e8HDfZfjjiwD8/thKx3eVCYIJ3WfNg33P35jo= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:a4e4:e6ec:9fdd:1bdd]) (user=samitolvanen job=sendgmr) by 2002:a05:6a00:1390:b0:540:b6b6:e978 with SMTP id t16-20020a056a00139000b00540b6b6e978mr3321390pfg.8.1662674154442; Thu, 08 Sep 2022 14:55:54 -0700 (PDT) Date: Thu, 8 Sep 2022 14:55:00 -0700 In-Reply-To: <20220908215504.3686827-1-samitolvanen@google.com> Message-Id: <20220908215504.3686827-19-samitolvanen@google.com> Mime-Version: 1.0 References: <20220908215504.3686827-1-samitolvanen@google.com> X-Developer-Key: i=samitolvanen@google.com; a=openpgp; fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=1418; i=samitolvanen@google.com; h=from:subject; bh=9OoxBGSeValXYdhbTF14Jfw3MpaGMV549rycOq8LEaw=; b=owEB7QES/pANAwAKAUy19oSLvFbuAcsmYgBjGmS2qkSmjV+l0koJEkW3Ra86NWCQbdAoQUKsCsKu US5kAIeJAbMEAAEKAB0WIQQ1zPtjsoPW0663g5RMtfaEi7xW7gUCYxpktgAKCRBMtfaEi7xW7pPDDA Cn2pbnV5bcnzoGc8JddgQnV8D4DQRGk/vp6Uu/MGcpttE+hmRYXGnxPteqSuac3HNTSxdxiMaQbfi4 tBYcvtA6mZVp5tIWr3/aPPuCXplinZdK/00vI41ck/OgxL6dJAJOalxRJzlbGGoQcXuHN2qEF0xHTr /m3yfieyINfDIDo4hlAU5NQcvyjTWGcpk1tkvYoRl3NFUC5Tcu91qUajnAkFemmoRTlvav6BDdgLve 6I7D1tpAsuiRpM7MiIB9WdPztgJcnq3wGcE5+hlQyM3NNPYVKNJRkBwUyTGRzbOQ5MNHbAUE/uYTuZ UXkp9zyheMNGsyjM8WiRweAG84GbTPpJfv2qdX2QzOuq8OeMyHCx3/gNnAHfS3cz+ZwsyKBUTB95XM /xIO9SBobBIFVshdiOGryKwpvtyHrmgoTm36g2d0vRyq+zF59jNJhd4zf6kaJcYjXsGyh4SAyVxQtH 4CwhKkIc22A/byAV/q1kus+z4aFPKT0NFo0RM2dCxr0y4= X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Subject: [PATCH v5 18/22] kallsyms: Drop CONFIG_CFI_CLANG workarounds 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-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" With -fsanitize=3Dkcfi, the compiler no longer renames static functions with CONFIG_CFI_CLANG + ThinLTO. Drop the code that cleans up the ThinLTO hash from the function names. Signed-off-by: Sami Tolvanen Reviewed-by: Nick Desaulniers Reviewed-by: Kees Cook Tested-by: Kees Cook Tested-by: Nathan Chancellor --- kernel/kallsyms.c | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 3e7e2c2ad2f7..b27e6ea31f8b 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -159,7 +159,6 @@ static bool cleanup_symbol_name(char *s) * character in an identifier in C. Suffixes observed: * - foo.llvm.[0-9a-f]+ * - foo.[0-9a-f]+ - * - foo.[0-9a-f]+.cfi_jt */ res =3D strchr(s, '.'); if (res) { @@ -167,22 +166,6 @@ static bool cleanup_symbol_name(char *s) return true; } =20 - if (!IS_ENABLED(CONFIG_CFI_CLANG) || - !IS_ENABLED(CONFIG_LTO_CLANG_THIN) || - CONFIG_CLANG_VERSION >=3D 130000) - return false; - - /* - * Prior to LLVM 13, the following suffixes were observed when thinLTO - * and CFI are both enabled: - * - foo$[0-9]+ - */ - res =3D strrchr(s, '$'); - if (res) { - *res =3D '\0'; - return true; - } - return false; } =20 --=20 2.37.2.789.g6183377224-goog