From owner-svn-src-head@freebsd.org Tue Oct 20 17:24:30 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id C56674368D4; Tue, 20 Oct 2020 17:24:30 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CG0qL48ZXz4Xbg; Tue, 20 Oct 2020 17:24:30 +0000 (UTC) (envelope-from trasz@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 6DF13185CD; Tue, 20 Oct 2020 17:24:30 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 09KHOUL0050726; Tue, 20 Oct 2020 17:24:30 GMT (envelope-from trasz@FreeBSD.org) Received: (from trasz@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 09KHOUQV050725; Tue, 20 Oct 2020 17:24:30 GMT (envelope-from trasz@FreeBSD.org) Message-Id: <202010201724.09KHOUQV050725@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: trasz set sender to trasz@FreeBSD.org using -f From: Edward Tomasz Napierala Date: Tue, 20 Oct 2020 17:24:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366900 - head/sys/compat/linprocfs X-SVN-Group: head X-SVN-Commit-Author: trasz X-SVN-Commit-Paths: head/sys/compat/linprocfs X-SVN-Commit-Revision: 366900 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: 2.1.33 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: Tue, 20 Oct 2020 17:24:30 -0000 Author: trasz Date: Tue Oct 20 17:24:29 2020 New Revision: 366900 URL: https://svnweb.freebsd.org/changeset/base/366900 Log: Fix linprocfs(4) /proc/self/mem semantics to more closely match Linux. Steam's Anti-Cheat might depend on it. PR: 248223 Analyzed by: Alex S Reviewed by: kib MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26816 Modified: head/sys/compat/linprocfs/linprocfs.c Modified: head/sys/compat/linprocfs/linprocfs.c ============================================================================== --- head/sys/compat/linprocfs/linprocfs.c Tue Oct 20 17:19:10 2020 (r366899) +++ head/sys/compat/linprocfs/linprocfs.c Tue Oct 20 17:24:29 2020 (r366900) @@ -1276,6 +1276,27 @@ linprocfs_doprocmaps(PFS_FILL_ARGS) } /* + * Filler function for proc/pid/mem + */ +static int +linprocfs_doprocmem(PFS_FILL_ARGS) +{ + ssize_t resid; + int error; + + resid = uio->uio_resid; + error = procfs_doprocmem(PFS_FILL_ARGNAMES); + + if (uio->uio_rw == UIO_READ && resid != uio->uio_resid) + return (0); + + if (error == EFAULT) + error = EIO; + + return (error); +} + +/* * Criteria for interface name translation */ #define IFP_IS_ETH(ifp) (ifp->if_type == IFT_ETHER) @@ -1853,7 +1874,7 @@ linprocfs_init(PFS_INIT_ARGS) NULL, &procfs_notsystem, NULL, 0); pfs_create_file(dir, "maps", &linprocfs_doprocmaps, NULL, NULL, NULL, PFS_RD); - pfs_create_file(dir, "mem", &procfs_doprocmem, + pfs_create_file(dir, "mem", &linprocfs_doprocmem, procfs_attr_rw, &procfs_candebug, NULL, PFS_RDWR | PFS_RAW); pfs_create_file(dir, "mounts", &linprocfs_domtab, NULL, NULL, NULL, PFS_RD);