From owner-svn-src-head@freebsd.org Sun Jan 7 13:35:16 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 895C7E6DAED; Sun, 7 Jan 2018 13:35:16 +0000 (UTC) (envelope-from kp@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 507AC3AB2; Sun, 7 Jan 2018 13:35:16 +0000 (UTC) (envelope-from kp@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7A68421DC9; Sun, 7 Jan 2018 13:35:15 +0000 (UTC) (envelope-from kp@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w07DZFDw069855; Sun, 7 Jan 2018 13:35:15 GMT (envelope-from kp@FreeBSD.org) Received: (from kp@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w07DZFWh069854; Sun, 7 Jan 2018 13:35:15 GMT (envelope-from kp@FreeBSD.org) Message-Id: <201801071335.w07DZFWh069854@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kp set sender to kp@FreeBSD.org using -f From: Kristof Provost Date: Sun, 7 Jan 2018 13:35:15 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r327675 - head/sys/netpfil/pf X-SVN-Group: head X-SVN-Commit-Author: kp X-SVN-Commit-Paths: head/sys/netpfil/pf X-SVN-Commit-Revision: 327675 X-SVN-Commit-Repository: base 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: 2.1.25 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: Sun, 07 Jan 2018 13:35:16 -0000 Author: kp Date: Sun Jan 7 13:35:15 2018 New Revision: 327675 URL: https://svnweb.freebsd.org/changeset/base/327675 Log: pf: Avoid integer overflow issues by using mallocarray() iso. malloc() pfioctl() handles several ioctl that takes variable length input, these include: - DIOCRADDTABLES - DIOCRDELTABLES - DIOCRGETTABLES - DIOCRGETTSTATS - DIOCRCLRTSTATS - DIOCRSETTFLAGS All of them take a pfioc_table struct as input from userland. One of its elements (pfrio_size) is used in a buffer length calculation. The calculation contains an integer overflow which if triggered can lead to out of bound reads and writes later on. Reported by: Ilja Van Sprundel Modified: head/sys/netpfil/pf/pf_ioctl.c Modified: head/sys/netpfil/pf/pf_ioctl.c ============================================================================== --- head/sys/netpfil/pf/pf_ioctl.c Sun Jan 7 13:21:01 2018 (r327674) +++ head/sys/netpfil/pf/pf_ioctl.c Sun Jan 7 13:35:15 2018 (r327675) @@ -2531,7 +2531,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_table); - pfrts = malloc(totlen, M_TEMP, M_WAITOK); + pfrts = mallocarray(io->pfrio_size, sizeof(struct pfr_table), + M_TEMP, M_WAITOK); + if (! pfrts) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfrts, totlen); if (error) { free(pfrts, M_TEMP); @@ -2555,7 +2560,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_table); - pfrts = malloc(totlen, M_TEMP, M_WAITOK); + pfrts = mallocarray(io->pfrio_size, sizeof(struct pfr_table), + M_TEMP, M_WAITOK); + if (! pfrts) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfrts, totlen); if (error) { free(pfrts, M_TEMP); @@ -2579,7 +2589,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_table); - pfrts = malloc(totlen, M_TEMP, M_WAITOK); + pfrts = mallocarray(io->pfrio_size, sizeof(struct pfr_table), + M_TEMP, M_WAITOK); + if (! pfrts) { + error = ENOMEM; + break; + } PF_RULES_RLOCK(); error = pfr_get_tables(&io->pfrio_table, pfrts, &io->pfrio_size, io->pfrio_flags | PFR_FLAG_USERIOCTL); @@ -2600,7 +2615,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_tstats); - pfrtstats = malloc(totlen, M_TEMP, M_WAITOK); + pfrtstats = mallocarray(io->pfrio_size, + sizeof(struct pfr_tstats), M_TEMP, M_WAITOK); + if (! pfrtstats) { + error = ENOMEM; + break; + } PF_RULES_WLOCK(); error = pfr_get_tstats(&io->pfrio_table, pfrtstats, &io->pfrio_size, io->pfrio_flags | PFR_FLAG_USERIOCTL); @@ -2621,7 +2641,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_table); - pfrts = malloc(totlen, M_TEMP, M_WAITOK); + pfrts = mallocarray(io->pfrio_size, sizeof(struct pfr_table), + M_TEMP, M_WAITOK); + if (! pfrts) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfrts, totlen); if (error) { free(pfrts, M_TEMP); @@ -2645,7 +2670,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_table); - pfrts = malloc(totlen, M_TEMP, M_WAITOK); + pfrts = mallocarray(io->pfrio_size, sizeof(struct pfr_table), + M_TEMP, M_WAITOK); + if (! pfrts) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfrts, totlen); if (error) { free(pfrts, M_TEMP); @@ -2684,7 +2714,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2711,7 +2746,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2739,7 +2779,12 @@ DIOCCHANGEADDR_error: } count = max(io->pfrio_size, io->pfrio_size2); totlen = count * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(count, sizeof(struct pfr_addr), M_TEMP, + M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2767,7 +2812,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } PF_RULES_RLOCK(); error = pfr_get_addrs(&io->pfrio_table, pfras, &io->pfrio_size, io->pfrio_flags | PFR_FLAG_USERIOCTL); @@ -2788,7 +2838,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_astats); - pfrastats = malloc(totlen, M_TEMP, M_WAITOK); + pfrastats = mallocarray(io->pfrio_size, + sizeof(struct pfr_astats), M_TEMP, M_WAITOK); + if (! pfrastats) { + error = ENOMEM; + break; + } PF_RULES_RLOCK(); error = pfr_get_astats(&io->pfrio_table, pfrastats, &io->pfrio_size, io->pfrio_flags | PFR_FLAG_USERIOCTL); @@ -2809,7 +2864,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2836,7 +2896,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2863,7 +2928,12 @@ DIOCCHANGEADDR_error: break; } totlen = io->pfrio_size * sizeof(struct pfr_addr); - pfras = malloc(totlen, M_TEMP, M_WAITOK); + pfras = mallocarray(io->pfrio_size, sizeof(struct pfr_addr), + M_TEMP, M_WAITOK); + if (! pfras) { + error = ENOMEM; + break; + } error = copyin(io->pfrio_buffer, pfras, totlen); if (error) { free(pfras, M_TEMP); @@ -2905,7 +2975,12 @@ DIOCCHANGEADDR_error: break; } totlen = sizeof(struct pfioc_trans_e) * io->size; - ioes = malloc(totlen, M_TEMP, M_WAITOK); + ioes = mallocarray(io->size, sizeof(struct pfioc_trans_e), + M_TEMP, M_WAITOK); + if (! ioes) { + error = ENOMEM; + break; + } error = copyin(io->array, ioes, totlen); if (error) { free(ioes, M_TEMP); @@ -2971,7 +3046,12 @@ DIOCCHANGEADDR_error: break; } totlen = sizeof(struct pfioc_trans_e) * io->size; - ioes = malloc(totlen, M_TEMP, M_WAITOK); + ioes = mallocarray(io->size, sizeof(struct pfioc_trans_e), + M_TEMP, M_WAITOK); + if (! ioes) { + error = ENOMEM; + break; + } error = copyin(io->array, ioes, totlen); if (error) { free(ioes, M_TEMP); @@ -3037,7 +3117,12 @@ DIOCCHANGEADDR_error: break; } totlen = sizeof(struct pfioc_trans_e) * io->size; - ioes = malloc(totlen, M_TEMP, M_WAITOK); + ioes = mallocarray(io->size, sizeof(struct pfioc_trans_e), + M_TEMP, M_WAITOK); + if (! ioes) { + error = ENOMEM; + break; + } error = copyin(io->array, ioes, totlen); if (error) { free(ioes, M_TEMP); @@ -3238,7 +3323,12 @@ DIOCCHANGEADDR_error: } bufsiz = io->pfiio_size * sizeof(struct pfi_kif); - ifstore = malloc(bufsiz, M_TEMP, M_WAITOK); + ifstore = mallocarray(io->pfiio_size, sizeof(struct pfi_kif), + M_TEMP, M_WAITOK); + if (! ifstore) { + error = ENOMEM; + break; + } PF_RULES_RLOCK(); pfi_get_ifaces(io->pfiio_name, ifstore, &io->pfiio_size); PF_RULES_RUNLOCK();