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Fri, 27 Mar 2020 11:14:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585307661; 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=paXF4BUdtUbKk4eCMDfsD2R4BGRN/BEYl8hEBt1HBS4=; b=RsBuIhKpkJCtLUWR6vu4Np2umNc9E0rByxtZaGvn0qt+9BBChc4IC9BF0nrX0D6/vp7L86 ChL3yICp4MAfSc/ty9iqIW98wHax4Wsb8oN3/342bA7ert3673rjz9DsQPJmA0VUX7m7+z KQsmnBjaLQM+UumhWDUaWBfTBGrpFc0= X-MC-Unique: ZNI5rlmEN4CVIge7hMCfWA-1 From: Jason Wang To: qemu-devel@nongnu.org, peter.maydell@linaro.org Subject: [PULL 03/13] Fixed integer overflow in e1000e Date: Fri, 27 Mar 2020 19:13:57 +0800 Message-Id: <1585307647-24456-4-git-send-email-jasowang@redhat.com> In-Reply-To: <1585307647-24456-1-git-send-email-jasowang@redhat.com> References: <1585307647-24456-1-git-send-email-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 63.128.21.74 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: Andrew Melnychenko , Jason Wang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: Andrew Melnychenko Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=3D1737400 Fixed setting max_queue_num if there are no peers in NICConf. qemu_new_nic() creates NICState with 1 NetClientState(index 0) without peers, set max_queue_num to 0 - It prevents undefined behavior and possible crashes, especially during pcie hotplug. Fixes: 6f3fbe4ed06 ("net: Introduce e1000e device emulation") Signed-off-by: Andrew Melnychenko Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Dmitry Fleytman Signed-off-by: Jason Wang --- hw/net/e1000e.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/net/e1000e.c b/hw/net/e1000e.c index a91dbdc..f2cc155 100644 --- a/hw/net/e1000e.c +++ b/hw/net/e1000e.c @@ -328,7 +328,7 @@ e1000e_init_net_peer(E1000EState *s, PCIDevice *pci_dev= , uint8_t *macaddr) s->nic =3D qemu_new_nic(&net_e1000e_info, &s->conf, object_get_typename(OBJECT(s)), dev->id, s); =20 - s->core.max_queue_num =3D s->conf.peers.queues - 1; + s->core.max_queue_num =3D s->conf.peers.queues ? s->conf.peers.queues = - 1 : 0; =20 trace_e1000e_mac_set_permanent(MAC_ARG(macaddr)); memcpy(s->core.permanent_mac, macaddr, sizeof(s->core.permanent_mac)); --=20 2.5.0