From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=143.255.12.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793064714; b=IvHsTiqXhAqceRistSqahJ3a4QPozOWx+KvDBLA1Pl2kKbhMTCctePpc7iFGlPKxm5Gl kggzqLRnyVv+0+T9GrXYvwD8R2t73s8Wt5fxZV951BTEu+JeyKH0qcolPSRwHmvTLZpYx LwTBex5oSgxIcaufTxohJewEpYPvFgTnyVdmUVWdN3FcM46O3NBeHgFQncxL46sCDUrH+ sCWwx2RYWFg/K/YIGDiTXLLHMfRQ6K44vEsH1WViXuR3Ta3qYbG5LD98SzhUjEj1SD0QB DtgmTzG78gJcO6XXJ6I280lblaUUlWVFJbdsx3cl3oFqNIp1mexHX7eluSWoJ6SWcyg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793064714; h=DMARC-Filter:DKIM-Signature:Received:Message-ID:From:To:Cc:Subject: In-Reply-To:References:Date:MIME-Version:Content-Type; bh=jSk2medBx+PtR34EmkrUqHDqmChSl5sAB6MpgXZMPFQ=; b=fgGERwjbbT7WrJr5xwrvOA04knQZ8alfkdcRwq2OPHQw6PwO7lie+LVSEZxU9QgFLG8x w6r3lcldKXw4oUkAiVYdzLI+VT9gWwJt/jai/uomAAKiMmC+Wv/8iiap0OeE9O8dkZ0UE AKsf3DkeJea9UY7d8q+jGUTzlMtM5WBMkQc89W3nOhrs9DHX2YiHR0+dSKQR/1tE/kayn fSR3gj2NNDQw5RKYUlF7CGf2yxsyza+o7C89iFNLCFQAvasuP0X9pqh5lBjH/WPA8AmIS HImaxsNDrSrVJccZsqEeGePx3z4XbCTdq3TP7Qj8wyDhSizcwIx2FDtMszXTGXURDuQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=manguebit.org; spf=pass smtp.mailfrom=manguebit.org; dkim=pass header.d=manguebit.org header.i=@manguebit.org header.a=rsa-sha256 header.s=dkim header.b=cZBETMzh; arc=none smtp.remote-ip=143.255.12.172 Received: from mx1.manguebit.org (mx1.manguebit.org [143.255.12.172]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0A3DF606A31A; Tue, 27 Oct 2026 01:31:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 0A3DF606A31A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=manguebit.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=manguebit.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=manguebit.org header.i=@manguebit.org header.a=rsa-sha256 header.s=dkim header.b=cZBETMzh DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=manguebit.org; s=dkim; h=Content-Type:MIME-Version:Date:References: In-Reply-To:Subject:Cc:To:From:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=jSk2medBx+PtR34EmkrUqHDqmChSl5sAB6MpgXZMPFQ=; b=cZBETMzhm2Do2XtXioksC+Pds4 ovjKfJjsRadUQ9tRiVu5OJ5nQ+vUtFo+O4tV2NaESg7Qn7Q9Aubrf2bMYX0ItPg00lnINHjsme9B5 8fiaycGzO5LfFG36Brm5Sr7FgvGgcZt/jB+Nyn5otBTJDgiHfOM3UESvw2t97OpTiBWrQjTBD3axd NHpdgSjhiFDyxQ2DX6niMh2A8/IyuIWZX0WWV4/eQK/YN0VOJ8pCCMXh2jVEPaNiNRDBuU+U78LRx nR9pnj9TwReRfYHbN5K0+daZHQLaZrdckrHK9bwl6ly8NCeR5RWkKOrg78R0NCqQFu6YsDfFxsmCG CuOAnYOA==; Received: from pc by mx1.manguebit.org with local (Exim 4.100.1) id 1xLW2O-000000006NJ-2Wyo; Mon, 26 Oct 2026 22:31:41 -0300 Message-ID: <7fefb04108efc48418cb2a8ff7287293@manguebit.org> From: Paulo Alcantara To: Weiming Shi , Namjae Jeon , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org, Steve French , David Howells , Xiang Mei , stable@vger.kernel.org, co+24c7c12d69e63c6d@bugs.sh Subject: Re: [PATCH] smb: client: stop processing a read response after a receive error In-Reply-To: <20261025090730.2893106-1-bestswngs@gmail.com> References: <20261025090730.2893106-1-bestswngs@gmail.com> Date: Mon, 26 Oct 2026 22:31:41 -0300 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain Weiming Shi writes: > cifs_read_iter_from_socket() may call cifs_reconnect() before returning an > error. The reconnect path aborts pending mids and invokes their callbacks. > The callback can then release the cifs_io_subrequest containing rdata. > > cifs_readv_receive() nevertheless continues after a negative return and may > dereference rdata in cifs_readv_discard(). KASAN reports the resulting > UAF: > > BUG: KASAN: slab-use-after-free in cifs_readv_receive > Read of size 4 by task cifsd > cifs_readv_receive (fs/smb/client/transport.c:1284) > cifs_demultiplex_thread (fs/smb/client/connect.c:1355) > kthread (kernel/kthread.c:436) > ret_from_fork (arch/x86/kernel/process.c:158) > > Freed by task 148: > netfs_put_subrequest (fs/netfs/objects.c:267) > netfs_read_collection (fs/netfs/read_collect.c:460) > netfs_wait_for_in_progress (fs/netfs/misc.c:462) > > Return the socket error immediately, as this path did before the iterator > conversion. This also avoids adding a negative length to total_read. > ... Applied.