From owner-dev-commits-src-main@freebsd.org Mon May 31 23:09:51 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 EEECD632950; Mon, 31 May 2021 23:09:51 +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 4Fv9wv6D6Lz3PVk; Mon, 31 May 2021 23:09:51 +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 B3BBC18F85; Mon, 31 May 2021 23:09:51 +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 14VN9pZ6040213; Mon, 31 May 2021 23:09:51 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 14VN9pIY040212; Mon, 31 May 2021 23:09:51 GMT (envelope-from git) Date: Mon, 31 May 2021 23:09:51 GMT Message-Id: <202105312309.14VN9pIY040212@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: b2f9575646f8 - main - ffs: Correct the input size check in sysctl_ffs_fsck() 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: b2f9575646f89cdddcad76acae3e9305535506a2 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, 31 May 2021 23:09:52 -0000 The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=b2f9575646f89cdddcad76acae3e9305535506a2 commit b2f9575646f89cdddcad76acae3e9305535506a2 Author: Mark Johnston AuthorDate: 2021-05-31 22:56:34 +0000 Commit: Mark Johnston CommitDate: 2021-05-31 22:59:18 +0000 ffs: Correct the input size check in sysctl_ffs_fsck() Make sure we return an error if no input was specified, since SYSCTL_IN() will report success in that case. Reported by: KMSAN Reviewed by: mckusick MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30586 --- sys/ufs/ffs/ffs_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/ufs/ffs/ffs_alloc.c b/sys/ufs/ffs/ffs_alloc.c index c7a1e2dec15e..c895c8c7bf07 100644 --- a/sys/ufs/ffs/ffs_alloc.c +++ b/sys/ufs/ffs/ffs_alloc.c @@ -3211,9 +3211,9 @@ sysctl_ffs_fsck(SYSCTL_HANDLER_ARGS) cap_rights_t rights; int filetype, error; - if (req->newlen > sizeof cmd) + if (req->newptr == NULL || req->newlen > sizeof(cmd)) return (EBADRPC); - if ((error = SYSCTL_IN(req, &cmd, sizeof cmd)) != 0) + if ((error = SYSCTL_IN(req, &cmd, sizeof(cmd))) != 0) return (error); if (cmd.version != FFS_CMD_VERSION) return (ERPCMISMATCH);