From unknown Sun Jun 22 00:41:43 2025 X-Loop: help-debbugs@gnu.org Subject: bug#78789: make-struct/no-tail segfault Resent-From: Ido Yariv Original-Sender: "Debbugs-submit" Resent-CC: bug-guile@gnu.org Resent-Date: Fri, 13 Jun 2025 21:52:05 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 78789 X-GNU-PR-Package: guile X-GNU-PR-Keywords: To: 78789@debbugs.gnu.org X-Debbugs-Original-To: bug-guile@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.174985151814807 (code B ref -1); Fri, 13 Jun 2025 21:52:05 +0000 Received: (at submit) by debbugs.gnu.org; 13 Jun 2025 21:51:58 +0000 Received: from localhost ([127.0.0.1]:53093 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1uQCJZ-0003qY-18 for submit@debbugs.gnu.org; Fri, 13 Jun 2025 17:51:58 -0400 Received: from lists.gnu.org ([2001:470:142::17]:37288) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1uQCJW-0003oN-4h for submit@debbugs.gnu.org; Fri, 13 Jun 2025 17:51:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uQCJM-0006Go-7h for bug-guile@gnu.org; Fri, 13 Jun 2025 17:51:44 -0400 Received: from mail-ej1-x62a.google.com ([2a00:1450:4864:20::62a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1uQCJK-0005P3-Nx for bug-guile@gnu.org; Fri, 13 Jun 2025 17:51:43 -0400 Received: by mail-ej1-x62a.google.com with SMTP id a640c23a62f3a-ad572ba1347so403688666b.1 for ; Fri, 13 Jun 2025 14:51:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1749851500; x=1750456300; darn=gnu.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=3iyhjKGjv3nmr2j3sXd36B4fez4NZLloxHaVeA0a7OA=; b=haIVpOjSwhaPozflng6/0bBuYsT3ViGbJtYZdDQXs0V0C9b4dI3a+rxVlOHEZ3UWaf otkYqNDJ0/2SKiSxJWH6/uD0KzfowIbJItkncGjvyAeI5kb5HgOdlAcayZDFN+1FA5Hy rqMous086n05buHYFGcmN/SpG0QlJT0wNbkVpzlt+5TDn+DB4fZyVPECR+uD/eK5z0Zd bC8MJCUsjZEd2tYOPomy/quvNfxD54ctG4O+ieecEjyz/4pNfzQdIO4wfTTIQcX6BZJG dswIDoTYqMUS5ZKTjNaXG8CKYOi8Bn5iqM78IFvFyZ8W356JkqQ+tp6JehOAaDYcW1nq gFzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749851500; x=1750456300; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=3iyhjKGjv3nmr2j3sXd36B4fez4NZLloxHaVeA0a7OA=; b=iyaQA4jTPcDqt2RY910SH2hTx8p/pf2MtljGAFw2zNKtfa2REn5v08mWkVaPdkh4EI NrsQF5OFUDOYZNTUVJSxXNGA/y+7iWxLUSV+6AbQorK5FWCdVtVG/vHeTusK3vzXimF9 /7DSAAo/K8SXUmiaB+VhG4eM+I9mZ3rCw32prjElKJy/hHuzFh9apRp/0KiC65RmuNg7 n9YsHNoPAlMBSFPxwroBCBTjigFwngGwMg+la5Wf2NEGy++K+uPYzXvryv+LXE3po138 ILrTbG9n9UlYF+1EUUT6ZdHBAOQEPrZU5Fdxm0o5SCSkhfUTkEhb0H4iphvS5U9kD0g2 oHPA== X-Gm-Message-State: AOJu0YyPvdr7ZCwluSKjpMeYHZYncuOtaxVIChspabESyWerFaueZqWt k1pyx5f9qsHc56DmmIxoVKEtZ+yGTq0xLoOhr3MSnxnhDIva85AirKEiUon4rybdziVnUBs+luu 0g4lKUsx22LxHkm0RgKs7iDAip4KC9OwwMuC+ego= X-Gm-Gg: ASbGncs2kTyYreHCtpf1+4cIfyptTbFxKuVuBngZ69GMCDZkKKZ2E9uCeiUaC+auiaj dUy6TyqQzdjvkwQnw2zHCNlVAhdkTPa5sydq3CsbT0zGiXA112l0Vde4ZrllL76eFEW2A1IE6I1 J3GfJe+Kp8QjaX8O+isFo82r4ztB6cgJNFbYWcG+YxZANKSeWtj6B8U9fVogU3lahvH3Ee+b26B QRMPf9rH3uRKUKM X-Google-Smtp-Source: AGHT+IEZkiws3tketlH0NbxcOkgiXFDf40EeaQQolMsT5iA7o0A5HyaUb6+vWso6JgQsp87yitq6GIGiN3POXUjK/qg= X-Received: by 2002:a17:906:c141:b0:add:ee2c:7313 with SMTP id a640c23a62f3a-adfad37351cmr62078766b.22.1749851500195; Fri, 13 Jun 2025 14:51:40 -0700 (PDT) MIME-Version: 1.0 From: Ido Yariv Date: Fri, 13 Jun 2025 17:51:27 -0400 X-Gm-Features: AX0GCFsTzjjcQRFbVVJcS615Fg7iUbQpRKikI4YRBoviMoL9PNYvu4bXLr3Skws Message-ID: Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::62a; envelope-from=yarivido@gmail.com; helo=mail-ej1-x62a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 1.0 (+) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -0.0 (/) Hi, Calling make-struct/no-tail with an incorrect layout type could lead to a segmentation fault. For example the following: ``` (make-struct/no-tail (make-vtable standard-vtable-fields #f) 0) ``` results in: ``` Thread 1 "guile" received signal SIGSEGV, Segmentation fault. scm_is_valid_vtable_layout (layout=0x2) at /src/guile/libguile/struct.c:165 165 c_layout = scm_i_symbol_chars (layout); (gdb) bt #0 scm_is_valid_vtable_layout (layout=0x2) at /src/guile/libguile/struct.c:165 #1 0x00007ffff7f4044d in scm_i_struct_inherit_vtable_magic (vtable=vtable@entry=0x7ffff7705960, obj=obj@entry=0x7ffff7705910) at /src/guile/libguile/struct.c:213 #2 0x00007ffff7f406ba in scm_c_make_structv (vtable=vtable@entry=0x7ffff7705960, n_tail=n_tail@entry=0, n_init=n_init@entry=1, init=0x7fffffffdd60) at /src/guile/libguile/struct.c:366 #3 0x00007ffff7f408e9 in scm_make_struct_no_tail (vtable=0x7ffff7705960, init=0x304) at /src/guile/libguile/struct.c:493 ``` Thanks, Ido.