From nobody Tue May 17 07:05:14 2022 X-Original-To: fs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 09D2A1B3DF9D for ; Tue, 17 May 2022 07:05:16 +0000 (UTC) (envelope-from bugzilla-noreply@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 4L2Rvv61Gkz3t1t for ; Tue, 17 May 2022 07:05:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 AFFD37FF2 for ; Tue, 17 May 2022 07:05:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 24H75FYJ007763 for ; Tue, 17 May 2022 07:05:15 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 24H75FoQ007762 for fs@FreeBSD.org; Tue, 17 May 2022 07:05:15 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 263971] ffs: malicious superblock can cause buffer overflow during tasting: panic: vm_fault_lookup: fault on nofault entry, addr: 0xffffffc07cb67000 Date: Tue, 17 May 2022 07:05:14 +0000 X-Bugzilla-Reason: AssignedTo CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: Unspecified X-Bugzilla-Keywords: crash, needs-qa X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: mckusick@FreeBSD.org X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: fs@FreeBSD.org X-Bugzilla-Flags: maintainer-feedback? maintainer-feedback? mfc-stable13? mfc-stable12? X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1652771115; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4pBQ6qJkhfRBEE7RcAdKZcKk15uXMW69U8g88nquyfg=; b=Mu5imsFGmzVOm7H2xJn6SXQvJjhGgdeF4xMBCCAgkehRC4Mgq3bLMSqQuxAXv/336L1cX6 DFHW4CNtmqoLyLD8ha6QsYWMim+pnuLZ+8/1s5/1dt3ooESINwZ0tW8+EE8oIDiplKmdXo WhpLM8SkjpgkGBXnNBIs0AIxLG6OjAaS/00AwBZVYvtVttBUGZDDS4lcckMN3B09VcSwlc rIoNVNm80YJeK6d3n2OkurentoAvyeQri5r132CqPnJrDzqQbT+s9UkMT4Snizfmq/6kLp VIoBvXXzz9ZCoIzHAchdlRFLG+bA5gHAYRHIUXvwJDCAFduwQe94imI0xGWx9w== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1652771115; a=rsa-sha256; cv=none; b=ZKKrlkFOYDQNtTGp7Siq4OAOGDdvUvf8O41BL2NDLvZMsd4SL9HYZHGQAFzCOSdSBvc8ha gsAPSK1LEpFJbeF6eNUQkelseqQTo8g5yKKqdoj6ynBGAsgyo83+FUYXG4rg013qpJmRDh G43a7wFsnLUvWYt5Mxu9Ryn5m4VIzsHy70QpiNJCHjzOq9h+gHgoLZF8rKrgpZhBI2WK+E CUjYTQka8OW9XtgV284K4+aR7XrA4y8VsQwGTkZCIAgF6qU1oVfjpJYolkPu41c/kekIuz qdeekhZe1R/sh3JgpJs1VRIjwMsdrnEpZoxKBhguhV8+g8tga7Se6o0oLzD8uw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D263971 --- Comment #4 from Kirk McKusick --- (In reply to Robert Morris from comment #3) I have tried to further restrict the values that I accept for fs_cssize, fs_ncg, and fs_contigsumsize. And also put a limit on the size of the filesystem that can be mounted based on kernel memory limits. --=20 You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug.=