From nobody Sun Nov 9 11:36:03 2025 Delivered-To: importer@patchew.org Received-SPF: temperror (zoho.com: Error in retrieving data from DNS) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=temperror (zoho.com: Error in retrieving data from DNS) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1551906771786503.5480811427336; Wed, 6 Mar 2019 13:12:51 -0800 (PST) Received: from localhost ([127.0.0.1]:39629 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1dqB-0006CJ-G7 for importer@patchew.org; Wed, 06 Mar 2019 16:12:39 -0500 Received: from eggs.gnu.org ([209.51.188.92]:52619) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1dor-0005bU-MP for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:11:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h1dor-0006Pz-0C for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:11:17 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36360) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h1doq-0006Pc-PY for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:11:16 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 67F6D369CD; Wed, 6 Mar 2019 21:04:36 +0000 (UTC) Received: from gigantic.usersys.redhat.com (helium.bos.redhat.com [10.18.17.132]) by smtp.corp.redhat.com (Postfix) with ESMTP id 66D0B5C1A1; Wed, 6 Mar 2019 21:04:34 +0000 (UTC) From: Bandan Das To: qemu-devel@nongnu.org Date: Wed, 6 Mar 2019 16:04:07 -0500 Message-Id: <20190306210409.14842-2-bsd@redhat.com> In-Reply-To: <20190306210409.14842-1-bsd@redhat.com> References: <20190306210409.14842-1-bsd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Wed, 06 Mar 2019 21:04:36 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 1/3] usb-mtp: return incomplete transfer on a lstat failure X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" MTP writes objects in small chunks and at the end gets the real file size to update the object metadata. If this fails for any reason, return an INCOMPLETE_TRANSFER to the initiator Spotted by Coverity: CID 1398651 Signed-off-by: Bandan Das --- hw/usb/dev-mtp.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c index 4ee4fc5a89..4dde14fc78 100644 --- a/hw/usb/dev-mtp.c +++ b/hw/usb/dev-mtp.c @@ -1591,14 +1591,18 @@ done: return ret; } =20 -static void usb_mtp_update_object(MTPObject *parent, char *name) +static int usb_mtp_update_object(MTPObject *parent, char *name) { + int ret =3D -1; + MTPObject *o =3D usb_mtp_object_lookup_name(parent, name, strlen(name)); =20 if (o) { - lstat(o->path, &o->stat); + ret =3D lstat(o->path, &o->stat); } + + return ret; } =20 static void usb_mtp_write_data(MTPState *s) @@ -1655,13 +1659,18 @@ static void usb_mtp_write_data(MTPState *s) if (d->write_status !=3D WRITE_END) { return; } else { - /* Only for < 4G file sizes */ - if (s->dataset.size !=3D 0xFFFFFFFF && d->offset !=3D s->datas= et.size) { + /* + * Return an incomplete transfer if file size doesn't match + * for < 4G file or if lstat fails which will result in an inc= orrect + * file size + */ + if ((s->dataset.size !=3D 0xFFFFFFFF && + d->offset !=3D s->dataset.size) || + usb_mtp_update_object(parent, s->dataset.filename)) { usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 0, 0, 0, 0); goto done; } - usb_mtp_update_object(parent, s->dataset.filename); } } =20 --=20 2.19.2 From nobody Sun Nov 9 11:36:03 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1551906909534321.8126608794046; Wed, 6 Mar 2019 13:15:09 -0800 (PST) Received: from localhost ([127.0.0.1]:39646 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1dsV-0007Tz-Ce for importer@patchew.org; Wed, 06 Mar 2019 16:15:03 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53111) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1drI-0006nX-Me for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h1drH-0007U0-Uj for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49772) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h1drG-0007SJ-Tg for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:47 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 06D6C307EAB3; Wed, 6 Mar 2019 21:04:37 +0000 (UTC) Received: from gigantic.usersys.redhat.com (helium.bos.redhat.com [10.18.17.132]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8984C5C1A1; Wed, 6 Mar 2019 21:04:36 +0000 (UTC) From: Bandan Das To: qemu-devel@nongnu.org Date: Wed, 6 Mar 2019 16:04:08 -0500 Message-Id: <20190306210409.14842-3-bsd@redhat.com> In-Reply-To: <20190306210409.14842-1-bsd@redhat.com> References: <20190306210409.14842-1-bsd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Wed, 06 Mar 2019 21:04:37 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 2/3] usb-mtp: fix some usb_mtp_write_data return paths X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" During a write, free up the "path" before getting more data. Also, while we at it, remove the confusing usage of d->fd for storing mkdir status Spotted by Coverity: CID 1398642 Signed-off-by: Bandan Das --- hw/usb/dev-mtp.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c index 4dde14fc78..1f22284949 100644 --- a/hw/usb/dev-mtp.c +++ b/hw/usb/dev-mtp.c @@ -1605,7 +1605,7 @@ static int usb_mtp_update_object(MTPObject *parent, c= har *name) return ret; } =20 -static void usb_mtp_write_data(MTPState *s) +static int usb_mtp_write_data(MTPState *s) { MTPData *d =3D s->data_out; MTPObject *parent =3D @@ -1613,6 +1613,7 @@ static void usb_mtp_write_data(MTPState *s) char *path =3D NULL; uint64_t rc; mode_t mask =3D 0644; + int ret =3D 0; =20 assert(d !=3D NULL); =20 @@ -1621,13 +1622,13 @@ static void usb_mtp_write_data(MTPState *s) if (!parent || !s->write_pending) { usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 0, 0, 0, 0); - return; + return 1; } =20 if (s->dataset.filename) { path =3D g_strdup_printf("%s/%s", parent->path, s->dataset.fil= ename); if (s->dataset.format =3D=3D FMT_ASSOCIATION) { - d->fd =3D mkdir(path, mask); + ret =3D mkdir(path, mask); goto free; } d->fd =3D open(path, O_CREAT | O_WRONLY | @@ -1657,7 +1658,8 @@ static void usb_mtp_write_data(MTPState *s) goto done; } if (d->write_status !=3D WRITE_END) { - return; + g_free(path); + return ret; } else { /* * Return an incomplete transfer if file size doesn't match @@ -1685,12 +1687,14 @@ done: */ if (d->fd !=3D -1) { close(d->fd); + d->fd =3D -1; } free: g_free(s->dataset.filename); s->dataset.size =3D 0; g_free(path); s->write_pending =3D false; + return ret; } =20 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) @@ -1727,14 +1731,12 @@ static void usb_mtp_write_metadata(MTPState *s, uin= t64_t dlen) s->write_pending =3D true; =20 if (s->dataset.format =3D=3D FMT_ASSOCIATION) { - usb_mtp_write_data(s); - /* next_handle will be allocated to the newly created dir */ - if (d->fd =3D=3D -1) { + if (usb_mtp_write_data(s)) { + /* next_handle will be allocated to the newly created dir */ usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 0, 0, 0, 0); return; } - d->fd =3D -1; } =20 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, --=20 2.19.2 From nobody Sun Nov 9 11:36:03 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1551906906191936.5189958592198; Wed, 6 Mar 2019 13:15:06 -0800 (PST) Received: from localhost ([127.0.0.1]:39644 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1dsT-0007Sg-7T for importer@patchew.org; Wed, 06 Mar 2019 16:15:01 -0500 Received: from eggs.gnu.org ([209.51.188.92]:53101) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h1drH-0006nS-UH for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h1drG-0007TN-Vw for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:47 -0500 Received: from mx1.redhat.com ([209.132.183.28]:64810) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h1drG-0007SK-6M for qemu-devel@nongnu.org; Wed, 06 Mar 2019 16:13:46 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 914BC3089EC4; Wed, 6 Mar 2019 21:04:37 +0000 (UTC) Received: from gigantic.usersys.redhat.com (helium.bos.redhat.com [10.18.17.132]) by smtp.corp.redhat.com (Postfix) with ESMTP id 23C645C1A1; Wed, 6 Mar 2019 21:04:37 +0000 (UTC) From: Bandan Das To: qemu-devel@nongnu.org Date: Wed, 6 Mar 2019 16:04:09 -0500 Message-Id: <20190306210409.14842-4-bsd@redhat.com> In-Reply-To: <20190306210409.14842-1-bsd@redhat.com> References: <20190306210409.14842-1-bsd@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Wed, 06 Mar 2019 21:04:37 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 3/3] usb-mtp: prevent null dereference while deleting objects X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, kraxel@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Spotted by Coverity: CID 1399144 Signed-off-by: Bandan Das --- hw/usb/dev-mtp.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c index 1f22284949..06e376bcd2 100644 --- a/hw/usb/dev-mtp.c +++ b/hw/usb/dev-mtp.c @@ -1177,9 +1177,7 @@ static int usb_mtp_deletefn(MTPState *s, MTPObject *o= , uint32_t trans) usb_mtp_object_free_one(s, o); success =3D true; } - } - - if (o->format =3D=3D FMT_ASSOCIATION) { + } else if (o->format =3D=3D FMT_ASSOCIATION) { if (rmdir(o->path)) { partial_delete =3D true; } else { --=20 2.19.2