From owner-svn-src-head@FreeBSD.ORG Mon Jun 8 16:07:08 2015 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B03335D0; Mon, 8 Jun 2015 16:07:08 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 9E4741697; Mon, 8 Jun 2015 16:07:08 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t58G78vf092856; Mon, 8 Jun 2015 16:07:08 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t58G78EF092855; Mon, 8 Jun 2015 16:07:08 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201506081607.t58G78EF092855@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Mon, 8 Jun 2015 16:07:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r284157 - head/sys/kern X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jun 2015 16:07:08 -0000 Author: emaste Date: Mon Jun 8 16:07:07 2015 New Revision: 284157 URL: https://svnweb.freebsd.org/changeset/base/284157 Log: Add user facing errors for exceeding process memory limits Previously the process terminating with SIGABRT at startup was the only notification. PR: 200617 Reviewed by: kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D2731 Modified: head/sys/kern/imgact_elf.c Modified: head/sys/kern/imgact_elf.c ============================================================================== --- head/sys/kern/imgact_elf.c Mon Jun 8 15:24:24 2015 (r284156) +++ head/sys/kern/imgact_elf.c Mon Jun 8 16:07:07 2015 (r284157) @@ -732,7 +732,7 @@ __CONCAT(exec_, __elfN(imgact))(struct i u_long addr, baddr, et_dyn_addr, entry = 0, proghdr = 0; int32_t osrel = 0; int error = 0, i, n, interp_name_len = 0; - const char *interp = NULL, *newinterp = NULL; + const char *err_str = NULL, *interp = NULL, *newinterp = NULL; Elf_Brandinfo *brand_info; char *path; struct sysentvec *sv; @@ -755,11 +755,14 @@ __CONCAT(exec_, __elfN(imgact))(struct i if ((hdr->e_phoff > PAGE_SIZE) || (u_int)hdr->e_phentsize * hdr->e_phnum > PAGE_SIZE - hdr->e_phoff) { /* Only support headers in first page for now */ + uprintf("Program headers not in the first page\n"); return (ENOEXEC); } - phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff); - if (!aligned(phdr, Elf_Addr)) + phdr = (const Elf_Phdr *)(imgp->image_header + hdr->e_phoff); + if (!aligned(phdr, Elf_Addr)) { + uprintf("Unaligned program headers\n"); return (ENOEXEC); + } n = 0; baddr = 0; for (i = 0; i < hdr->e_phnum; i++) { @@ -773,8 +776,10 @@ __CONCAT(exec_, __elfN(imgact))(struct i /* Path to interpreter */ if (phdr[i].p_filesz > MAXPATHLEN || phdr[i].p_offset > PAGE_SIZE || - phdr[i].p_filesz > PAGE_SIZE - phdr[i].p_offset) + phdr[i].p_filesz > PAGE_SIZE - phdr[i].p_offset) { + uprintf("Invalid PT_INTERP\n"); return (ENOEXEC); + } interp = imgp->image_header + phdr[i].p_offset; interp_name_len = phdr[i].p_filesz; break; @@ -795,8 +800,10 @@ __CONCAT(exec_, __elfN(imgact))(struct i return (ENOEXEC); } if (hdr->e_type == ET_DYN) { - if ((brand_info->flags & BI_CAN_EXEC_DYN) == 0) + if ((brand_info->flags & BI_CAN_EXEC_DYN) == 0) { + uprintf("Cannot execute shared object\n"); return (ENOEXEC); + } /* * Honour the base load address from the dso if it is * non-zero for some reason. @@ -901,12 +908,19 @@ __CONCAT(exec_, __elfN(imgact))(struct i * not actually fault in all the segments pages. */ PROC_LOCK(imgp->proc); - if (data_size > lim_cur(imgp->proc, RLIMIT_DATA) || - text_size > maxtsiz || - total_size > lim_cur(imgp->proc, RLIMIT_VMEM) || - racct_set(imgp->proc, RACCT_DATA, data_size) != 0 || - racct_set(imgp->proc, RACCT_VMEM, total_size) != 0) { + if (data_size > lim_cur(imgp->proc, RLIMIT_DATA)) + err_str = "Data segment size exceeds process limit"; + else if (text_size > maxtsiz) + err_str = "Text segment size exceeds system limit"; + else if (total_size > lim_cur(imgp->proc, RLIMIT_VMEM)) + err_str = "Total segment size exceeds process limit"; + else if (racct_set(imgp->proc, RACCT_DATA, data_size) != 0) + err_str = "Data segment size exceeds resource limit"; + else if (racct_set(imgp->proc, RACCT_VMEM, total_size) != 0) + err_str = "Total segment size exceeds resource limit"; + if (err_str != NULL) { PROC_UNLOCK(imgp->proc); + uprintf("%s\n", err_str); return (ENOMEM); }