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Tue, 04 Aug 2020 02:41:25 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-491-P6gCVlKfNZyU0CBontyIeg-1; Tue, 04 Aug 2020 02:41:18 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3391719253C2; Tue, 4 Aug 2020 06:41:17 +0000 (UTC) Received: from jason-ThinkPad-T430s.redhat.com (ovpn-13-166.pek2.redhat.com [10.72.13.166]) by smtp.corp.redhat.com (Postfix) with ESMTP id 713E560BF4; Tue, 4 Aug 2020 06:41:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596523282; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nRmK6ldNQwrGyYExzTCRXxv7OxTu8BmMdV6vfrmJHAI=; b=YnXmklVoaayEnsWQyhAaMzJvZ3qA7vMIx3S6/E5mkEOpuDjyHLKsdTdD/4SrvHmSfBCcuA oWWjlGTc3TVukE2kFmf+2BaB6VD05wWal4XX5QDj4hyv9xoeKsnyWF0NV+zfir+IZkl8iB uXrIzUF67+pGMs5H6rfBH2lkMq1xa+I= X-MC-Unique: P6gCVlKfNZyU0CBontyIeg-1 From: Jason Wang To: peter.maydell@linaro.org Subject: [PULL 1/2] colo-compare: Remove superfluous NULL-pointer checks for s->iothread Date: Tue, 4 Aug 2020 14:41:09 +0800 Message-Id: <1596523270-5492-2-git-send-email-jasowang@redhat.com> In-Reply-To: <1596523270-5492-1-git-send-email-jasowang@redhat.com> References: <1596523270-5492-1-git-send-email-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=207.211.31.81; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/04 01:01:15 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jason Wang , Lukas Straub , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Lukas Straub s->iothread is checked for NULL on object creation in colo_compare_complete, so it's guaranteed not to be NULL. This resolves a false alert from Coverity (CID 1429969). Signed-off-by: Lukas Straub Reviewed-by: Philippe Mathieu-Daud=C3=83=C2=A9 Reviewed-by: Li Qiang Reviewed-by: Zhang Chen Signed-off-by: Jason Wang Reviewed-by: tag. --- net/colo-compare.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index cc15f23..2c20de1 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -1442,9 +1442,7 @@ static void colo_compare_finalize(Object *obj) qemu_chr_fe_deinit(&s->chr_notify_dev, false); } =20 - if (s->iothread) { - colo_compare_timer_del(s); - } + colo_compare_timer_del(s); =20 qemu_bh_delete(s->event_bh); =20 @@ -1470,9 +1468,7 @@ static void colo_compare_finalize(Object *obj) g_hash_table_destroy(s->connection_track_table); } =20 - if (s->iothread) { - object_unref(OBJECT(s->iothread)); - } + object_unref(OBJECT(s->iothread)); =20 g_free(s->pri_indev); g_free(s->sec_indev); --=20 2.7.4 From nobody Fri May 3 03:00:06 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Tue, 04 Aug 2020 02:41:26 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-513-98-H-YmlOZGbpnvLIelOIw-1; Tue, 04 Aug 2020 02:41:20 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 83AA61005504; Tue, 4 Aug 2020 06:41:19 +0000 (UTC) Received: from jason-ThinkPad-T430s.redhat.com (ovpn-13-166.pek2.redhat.com [10.72.13.166]) by smtp.corp.redhat.com (Postfix) with ESMTP id BC94960BF4; Tue, 4 Aug 2020 06:41:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596523282; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type:in-reply-to:in-reply-to: references:references; bh=5h4QWMFzdBPj3Pi9JiWXOeR4PM6zpX0kyyH91PillLM=; b=X175D01GzfuanGnhxrHwl0TyS/E51kCwJYpI8SAVt/GvjcemYKLt24WvVryzVTiVzZQUBG E2BM1ivcY6k7YK7y32ZQir7xXwZMnrC7aLUsaKlMsiaIWXTYp9vhaWok1ycdulK2vha1zn tWadECU2VDRurVIjq6JNa9CoP1iSKP0= X-MC-Unique: 98-H-YmlOZGbpnvLIelOIw-1 From: Jason Wang To: peter.maydell@linaro.org Subject: [PULL 2/2] hw/net/net_tx_pkt: fix assertion failure in net_tx_pkt_add_raw_fragment() Date: Tue, 4 Aug 2020 14:41:10 +0800 Message-Id: <1596523270-5492-3-git-send-email-jasowang@redhat.com> In-Reply-To: <1596523270-5492-1-git-send-email-jasowang@redhat.com> References: <1596523270-5492-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=207.211.31.120; envelope-from=jasowang@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/04 01:28:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jason Wang , Mauro Matteo Cascella , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Mauro Matteo Cascella An assertion failure issue was found in the code that processes network pac= kets while adding data fragments into the packet context. It could be abused by a malicious guest to abort the QEMU process on the host. This patch replaces = the affected assert() with a conditional statement, returning false if the curr= ent data fragment exceeds max_raw_frags. Reported-by: Alexander Bulekov Reported-by: Ziming Zhang Reviewed-by: Dmitry Fleytman Signed-off-by: Mauro Matteo Cascella Signed-off-by: Jason Wang Reviewed-by: tag. --- hw/net/net_tx_pkt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c index 9560e4a..da262ed 100644 --- a/hw/net/net_tx_pkt.c +++ b/hw/net/net_tx_pkt.c @@ -379,7 +379,10 @@ bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt,= hwaddr pa, hwaddr mapped_len =3D 0; struct iovec *ventry; assert(pkt); - assert(pkt->max_raw_frags > pkt->raw_frags); + + if (pkt->raw_frags >=3D pkt->max_raw_frags) { + return false; + } =20 if (!len) { return true; --=20 2.7.4