From owner-dev-commits-src-main@freebsd.org Mon Apr 26 18:55:33 2021 Return-Path: Delivered-To: dev-commits-src-main@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 5EA865EBDCE; Mon, 26 Apr 2021 18:55:33 +0000 (UTC) (envelope-from git@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 "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FTYxd25bpz4SN5; Mon, 26 Apr 2021 18:55:33 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 3657E4BC9; Mon, 26 Apr 2021 18:55:33 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 13QItXno065876; Mon, 26 Apr 2021 18:55:33 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 13QItX6x065875; Mon, 26 Apr 2021 18:55:33 GMT (envelope-from git) Date: Mon, 26 Apr 2021 18:55:33 GMT Message-Id: <202104261855.13QItX6x065875@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mark Johnston Subject: git: 409ab7e109c6 - main - imgact_elf: Ensure that the return value in parse_notes is initialized MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: markj X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 409ab7e109c692014e3484a74af248dd7a4746e8 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-main@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for the main branch of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Apr 2021 18:55:33 -0000 The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=409ab7e109c692014e3484a74af248dd7a4746e8 commit 409ab7e109c692014e3484a74af248dd7a4746e8 Author: Mark Johnston AuthorDate: 2021-04-26 18:53:16 +0000 Commit: Mark Johnston CommitDate: 2021-04-26 18:53:16 +0000 imgact_elf: Ensure that the return value in parse_notes is initialized parse_notes relies on the caller-supplied callback to initialize "res". Two callbacks are used in practice, brandnote_cb and note_fctl_cb, and the latter fails to initialize res. Fix it. In the worst case, the bug would cause the inner loop of check_note to examine more program headers than necessary, and the note header usually comes last anyway. Reviewed by: kib Reported by: KMSAN MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29986 --- sys/kern/imgact_elf.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c index 245894926ee1..c4aedbe6bbfa 100644 --- a/sys/kern/imgact_elf.c +++ b/sys/kern/imgact_elf.c @@ -2736,6 +2736,7 @@ note_fctl_cb(const Elf_Note *note, void *arg0, boolean_t *res) desc = (const Elf32_Word *)p; *arg->has_fctl0 = TRUE; *arg->fctl0 = desc[0]; + *res = TRUE; return (TRUE); }