From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A23B3448D03; Tue, 21 Jul 2026 21:57:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784671060; cv=none; b=lSvs2EWxKc30xR9bUwUfLxlSY2g3OYPFSWBjcLnG4ppZ1bzTJJfw9o1d+WEwAI0XNeRVD5LelA/qjQ1RdY67lacwTeUUYLvJBjYk45oJfEmBM47mG2jiK2YVYMWiQ0CQ/CRlGMWh0dZ/1kRO7rwGxPilf6oGC6cMV1/fNWT6AwU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784671060; c=relaxed/simple; bh=Hc2XQ1hp4Dd2tkvXshZEzbhz1isQHLtgl1NETZegLW0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IlnlUuyOr3ZuTZmaA78r1agQ70yErKdjlAF3KZJQ/omdDQfHKSJV5I2COxv1tJOxm3zsjAkUCDGuLey5mTEUg4iEUYdi1Jo4HXNjEhFecB9qTEIDl5H8c1nl/cWl6ImZ0+6VXPYm7ciZO/MT4wyGafwf77/0KQZaiFK9mKL1Lbk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Oy/cG7f5; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Oy/cG7f5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0D17E1F00A3A; Tue, 21 Jul 2026 21:57:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784671058; bh=41g0qsXL0i+PwotshQK4pNrYDwjg50bEJKFrUkVeoHk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Oy/cG7f5lDc6V2htiUAes8bARWEOAU+hNR78QBS1N9EL0k7GUa2S6M80/4hL4X8OK nBOlurqCm7v6qj/BzMJe7+WqhmIHzQFx+zBvqVgqdmaW0vub8SmE5BijDhWouUzI2h b5/f9zc8fMyKhbJTPewasmbLycmcvfQ1LSknyAiY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yunpeng Tian , Mingda Zhang , Gongming Wang , Peiyuan Xu , Qinrun Dai , Konstantin Komarov Subject: [PATCH 5.15 103/843] fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns Date: Tue, 21 Jul 2026 17:15:38 +0200 Message-ID: <20260721152408.317854300@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yunpeng Tian commit 57382ec6ac63b63dce2789e835fded28b698ae79 upstream. In the analysis pass of $LogFile journal replay, log_replay() copies LCNs from each action log record into an existing Dirty Page Table (DPT) entry without bounding the destination index. A crafted NTFS image with DPT entry lcns_follow=1 and an action log record with lcns_follow=2 produces a kernel slab out-of-bounds write at mount time: BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60 Write of size 8 at addr ffff8880095e1040 by task mount Two attacker-controlled fields can drive j+i past the allocated page_lcns[] array: 1. dp->lcns_follow (capacity) can be smaller than lrh->lcns_follow. 2. lrh->target_vcn may be smaller than dp->vcn, making the u64 subtraction wrap to a huge size_t. Validate target VCN delta and per-record LCN count against the DPT entry capacity, bail via the existing out: cleanup label with -EINVAL. This mirrors the bounds-check pattern added in commit b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") and commit 0ca0485e4b2e ("fs/ntfs3: validate rec->used in journal-replay file record check"). Fixes: b46acd6a6a62 ("fs/ntfs3: Add NTFS journal") Reported-by: Yunpeng Tian Reported-by: Mingda Zhang Reported-by: Gongming Wang Reported-by: Peiyuan Xu Reported-by: Qinrun Dai Cc: stable@vger.kernel.org Signed-off-by: Yunpeng Tian Signed-off-by: Konstantin Komarov Signed-off-by: Greg Kroah-Hartman --- fs/ntfs3/fslog.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) --- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -4544,11 +4544,21 @@ copy_lcns: * whole routine a loop, case Lcns do not fit below. */ t16 = le16_to_cpu(lrh->lcns_follow); - for (i = 0; i < t16; i++) { - size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) - - le64_to_cpu(dp->vcn)); - dp->page_lcns[j + i] = lrh->page_lcns[i]; - } + t32 = le32_to_cpu(dp->lcns_follow); + if (le64_to_cpu(lrh->target_vcn) < le64_to_cpu(dp->vcn)) { + err = -EINVAL; + goto out; + } + + for (i = 0; i < t16; i++) { + size_t j = (size_t)(le64_to_cpu(lrh->target_vcn) - + le64_to_cpu(dp->vcn)); + if (j >= t32 || i >= t32 - j) { + err = -EINVAL; + goto out; + } + dp->page_lcns[j + i] = lrh->page_lcns[i]; + } goto next_log_record_analyze;