From owner-svn-src-all@freebsd.org Fri Apr 26 00:39:31 2019 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D11221582A8A; Fri, 26 Apr 2019 00:39:31 +0000 (UTC) (envelope-from mw@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) server-signature RSA-PSS (4096 bits) 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 6952C72560; Fri, 26 Apr 2019 00:39:31 +0000 (UTC) (envelope-from mw@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 4DC113CF7; Fri, 26 Apr 2019 00:39:31 +0000 (UTC) (envelope-from mw@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x3Q0dVfd080820; Fri, 26 Apr 2019 00:39:31 GMT (envelope-from mw@FreeBSD.org) Received: (from mw@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x3Q0dVMw080819; Fri, 26 Apr 2019 00:39:31 GMT (envelope-from mw@FreeBSD.org) Message-Id: <201904260039.x3Q0dVMw080819@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mw set sender to mw@FreeBSD.org using -f From: Marcin Wojtas Date: Fri, 26 Apr 2019 00:39:31 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346718 - stable/12/stand/efi/libefi X-SVN-Group: stable-12 X-SVN-Commit-Author: mw X-SVN-Commit-Paths: stable/12/stand/efi/libefi X-SVN-Commit-Revision: 346718 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 6952C72560 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.994,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.96)[-0.957,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Apr 2019 00:39:32 -0000 Author: mw Date: Fri Apr 26 00:39:30 2019 New Revision: 346718 URL: https://svnweb.freebsd.org/changeset/base/346718 Log: MFC r343911: Allow reading the UEFI variable size When loading bigger variables form UEFI it is necessary to know their size beforehand, so that an appropriate amount of memory can be allocated. The easiest way to do this is to try to read the variable with buffer size equal 0, expecting EFI_BUFFER_TOO_SMALL error to be returned. Allow such possible approach in efi_getenv routine. Submitted by: Kornel Duleba Obtained from: Semihalf Sponsored by: Stormshield Modified: stable/12/stand/efi/libefi/efienv.c Modified: stable/12/stand/efi/libefi/efienv.c ============================================================================== --- stable/12/stand/efi/libefi/efienv.c Thu Apr 25 22:53:55 2019 (r346717) +++ stable/12/stand/efi/libefi/efienv.c Fri Apr 26 00:39:30 2019 (r346718) @@ -49,7 +49,7 @@ efi_getenv(EFI_GUID *g, const char *v, void *data, siz return (EFI_OUT_OF_RESOURCES); dl = *len; rv = RS->GetVariable(uv, g, &attr, &dl, data); - if (rv == EFI_SUCCESS) + if (rv == EFI_SUCCESS || rv == EFI_BUFFER_TOO_SMALL) *len = dl; free(uv); return (rv);