From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jeffrey Walton Newsgroups: gmane.lisp.guile.bugs Subject: bug#47429: Re 47429:allocating JIT code buffer failed: Permission denied Date: Fri, 26 Mar 2021 19:34:24 -0400 Message-ID: References: Reply-To: noloader@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="9571"; mail-complaints-to="usenet@ciao.gmane.io" To: 47429@debbugs.gnu.org Original-X-From: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Sat Mar 27 00:35:35 2021 Return-path: Envelope-to: guile-bugs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lPvzL-0002Md-CX for guile-bugs@m.gmane-mx.org; Sat, 27 Mar 2021 00:35:35 +0100 Original-Received: from localhost ([::1]:36018 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lPvzK-0001o3-Dm for guile-bugs@m.gmane-mx.org; 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Fri, 26 Mar 2021 23:35:01 +0000 Original-Received: (at 47429) by debbugs.gnu.org; 26 Mar 2021 23:34:51 +0000 Original-Received: from localhost ([127.0.0.1]:42868 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lPvyd-0004a0-1H for submit@debbugs.gnu.org; Fri, 26 Mar 2021 19:34:51 -0400 Original-Received: from mail-io1-f41.google.com ([209.85.166.41]:38728) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lPvya-0004Zj-RA for 47429@debbugs.gnu.org; Fri, 26 Mar 2021 19:34:49 -0400 Original-Received: by mail-io1-f41.google.com with SMTP id e8so7075119iok.5 for <47429@debbugs.gnu.org>; Fri, 26 Mar 2021 16:34:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:from:date:message-id:subject:to; bh=DpAk2jkQA5sTyTh6ffOLnacVPQYpUlMc8Gozv60jABg=; b=MBiO1DWTwYNVohm93moJefM8XQNBOIvuhKM38t6ohOok6zOKbEGIqa50vu429+Zqaf Dp/L4P3X4zQwdZ6oouuWLC+iM3bIhjkmIoTqW01KgQ2dI6K8sfjHq8FTPuiztywCOk/l 51bhJUd7MwNBSx+ag0CpgQNY1YxKXaST4Gc7WZ2fXmtRsc43dFUu9r7r7WWjnTZtLpqY f21kp3J+1iFPcV3A0R+pSLZylVKNbYafTcJzu1WjMtc6ts1KmWqHj/j22ysDmqan3UHv Tf5mCpSkCjcyfi5m8B6pqLxE8MrDNICpmRp7Hq/KG56Y1qNhvLrNroLnAIqV12zaD4pm JkXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:from:date:message-id :subject:to; bh=DpAk2jkQA5sTyTh6ffOLnacVPQYpUlMc8Gozv60jABg=; b=O8VQYE7tIgUNr6viAQxbYin+1EKd71Xta1pqQdGQB2L10N5pOwrJaQ0VbKkORI3NyO D3y4/Dbwsjh5cVUO7RLBcIQ+k/ucNcdZuF2HNc1QkQs6RgTzkndcVpcnTFGjh6QfxMaH hbb0NHQrW53WwbB2/xrEDyLh7MQqqqcYRZUllnSYEFo8JyHMlMpN6PX7oi5S+/w6mE97 9aQNCVDz0KNguJ7qaJX6K3PkXWFRw005eP4I9zuAtOsEpkzhRkJbFFAUlutk90maQURE 14b3AWcStHjiJv80wHiR4EDJX19FLeE8Ar9N4usM0iogt2Bs1daby45I5PuBAI9MrXDw Wefg== X-Gm-Message-State: AOAM531CNqp4RrCg8ArvVvgJiuZ83OeZHvQmj/i+dQkZlZAgLWvlLI// D3SQhLnFq9n/VPUvbysffrcZatEFNvq4uj/Mp8lEZUlaKa94iA== X-Google-Smtp-Source: ABdhPJzE1Hf2Uj6YlD07gVvPk6og9yCLCq6Hpqp8c6WWqJht9KcO/xrEP71EBIqrc0VnUbqFtYqueTmpf+Cc9E8k0bQ= X-Received: by 2002:a5d:8493:: with SMTP id t19mr12549741iom.28.1616801683177; Fri, 26 Mar 2021 16:34:43 -0700 (PDT) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guile@gnu.org List-Id: "Bug reports for GUILE, GNU's Ubiquitous Extension Language" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-guile-bounces+guile-bugs=m.gmane-mx.org@gnu.org Original-Sender: "bug-guile" Xref: news.gmane.io gmane.lisp.guile.bugs:10002 Archived-At: Dammit, check for the proper return value... % cat mmap-test.c #include #include #include #include int main(int argc, char* argv[]) { size_t len = 10; int prot = PROT_EXEC | PROT_READ | PROT_WRITE; int flags = MAP_PRIVATE | MAP_ANONYMOUS; void *p = mmap (NULL, len, prot, flags, -1, 0); int err = errno; if (p != (void*) -1) { printf("p is good\n"); munmap(p, len); } else { printf("p is bad (%d)\n", err); } return 0; } % clang -Wall mmap-test.c -o mmap-test.exe % ./mmap-test.exe p is bad (13) That is the permission denied. Next, avoid W+X: % cat mmap-test.c #include #include #include #include int main(int argc, char* argv[]) { size_t len = 10; int prot = /*PROT_EXEC |*/ PROT_READ | PROT_WRITE; int flags = MAP_PRIVATE | MAP_ANONYMOUS; void *p = mmap (NULL, len, prot, flags, -1, 0); int err = errno; if (p != (void*) -1) { printf("p is good\n"); munmap(p, len); } else { printf("p is bad (%d)\n", err); } return 0; } It looks like W^X is the culprit. Jeff