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Sat, 30 Nov 2019 19:42:48 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 29B2A11366F2; Sat, 30 Nov 2019 20:42:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1575142973; 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=3t/HhgZjzhBdRwBHKCZ+80RD28r4jF7bHY7IRHnb69k=; b=eRMgFg7Rq3sdymqbRdb5i9H8x7ri+4DviFyB7XDLKKYxvJkmwQrZLcQtvwCAozcgx1ytJc phuwWFdmCA3xxzcW4mmELA2/EY1areFZY/aUpZG2WxQpiBakz0dYpGqr7m7vWkayDoG8lC CihwLqJ1R+oSTGMA8MRuDjxXOI9f/ks= From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH 11/21] hw/ipmi: Fix latent realize() error handling bugs Date: Sat, 30 Nov 2019 20:42:30 +0100 Message-Id: <20191130194240.10517-12-armbru@redhat.com> In-Reply-To: <20191130194240.10517-1-armbru@redhat.com> References: <20191130194240.10517-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: YSDmZVBYMWe0y6c7WTE_LQ-1 X-Mimecast-Spam-Score: 0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.61 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: Corey Minyard , vsementsov@virtuozzo.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" isa_ipmi_bt_realize(), ipmi_isa_realize(), pci_ipmi_bt_realize(), and pci_ipmi_kcs_realize() crash when IPMIInterfaceClass method init() fails and their @errp argument is null. First messed up in commit 0719029c47 "ipmi: Add an ISA KCS low-level interface", then imitated in commit a9b74079cb "ipmi: Add a BT low-level interface" and commit 12f983c6aa "ipmi: Add PCI IPMI interfaces". The bug can't bite as no caller actually passes null, and none of the init() methods can actually fail. Fix it anyway. Cc: Corey Minyard Signed-off-by: Markus Armbruster --- hw/ipmi/isa_ipmi_bt.c | 7 +++++-- hw/ipmi/isa_ipmi_kcs.c | 7 +++++-- hw/ipmi/pci_ipmi_bt.c | 6 ++++-- hw/ipmi/pci_ipmi_kcs.c | 6 ++++-- 4 files changed, 18 insertions(+), 8 deletions(-) diff --git a/hw/ipmi/isa_ipmi_bt.c b/hw/ipmi/isa_ipmi_bt.c index 9a87ffd3f0..9fba5ed383 100644 --- a/hw/ipmi/isa_ipmi_bt.c +++ b/hw/ipmi/isa_ipmi_bt.c @@ -70,6 +70,7 @@ static void isa_ipmi_bt_lower_irq(IPMIBT *ib) =20 static void isa_ipmi_bt_realize(DeviceState *dev, Error **errp) { + Error *err =3D NULL; ISADevice *isadev =3D ISA_DEVICE(dev); ISAIPMIBTDevice *iib =3D ISA_IPMI_BT(dev); IPMIInterface *ii =3D IPMI_INTERFACE(dev); @@ -85,9 +86,11 @@ static void isa_ipmi_bt_realize(DeviceState *dev, Error = **errp) iib->bt.bmc->intf =3D ii; iib->bt.opaque =3D iib; =20 - iic->init(ii, 0, errp); - if (*errp) + iic->init(ii, 0, &err); + if (err) { + error_propagate(errp, err); return; + } =20 if (iib->isairq > 0) { isa_init_irq(isadev, &iib->irq, iib->isairq); diff --git a/hw/ipmi/isa_ipmi_kcs.c b/hw/ipmi/isa_ipmi_kcs.c index ca3ea36a3f..cc6bd817f2 100644 --- a/hw/ipmi/isa_ipmi_kcs.c +++ b/hw/ipmi/isa_ipmi_kcs.c @@ -69,6 +69,7 @@ static void isa_ipmi_kcs_lower_irq(IPMIKCS *ik) =20 static void ipmi_isa_realize(DeviceState *dev, Error **errp) { + Error *err =3D NULL; ISADevice *isadev =3D ISA_DEVICE(dev); ISAIPMIKCSDevice *iik =3D ISA_IPMI_KCS(dev); IPMIInterface *ii =3D IPMI_INTERFACE(dev); @@ -84,9 +85,11 @@ static void ipmi_isa_realize(DeviceState *dev, Error **e= rrp) iik->kcs.bmc->intf =3D ii; iik->kcs.opaque =3D iik; =20 - iic->init(ii, 0, errp); - if (*errp) + iic->init(ii, 0, &err); + if (err) { + error_propagate(errp, err); return; + } =20 if (iik->isairq > 0) { isa_init_irq(isadev, &iik->irq, iik->isairq); diff --git a/hw/ipmi/pci_ipmi_bt.c b/hw/ipmi/pci_ipmi_bt.c index 6ed925a665..ba9cf016b5 100644 --- a/hw/ipmi/pci_ipmi_bt.c +++ b/hw/ipmi/pci_ipmi_bt.c @@ -54,6 +54,7 @@ static void pci_ipmi_lower_irq(IPMIBT *ik) =20 static void pci_ipmi_bt_realize(PCIDevice *pd, Error **errp) { + Error *err =3D NULL; PCIIPMIBTDevice *pik =3D PCI_IPMI_BT(pd); IPMIInterface *ii =3D IPMI_INTERFACE(pd); IPMIInterfaceClass *iic =3D IPMI_INTERFACE_GET_CLASS(ii); @@ -74,8 +75,9 @@ static void pci_ipmi_bt_realize(PCIDevice *pd, Error **er= rp) pik->bt.raise_irq =3D pci_ipmi_raise_irq; pik->bt.lower_irq =3D pci_ipmi_lower_irq; =20 - iic->init(ii, 8, errp); - if (*errp) { + iic->init(ii, 8, &err); + if (err) { + error_propagate(errp, err); return; } pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pik->bt.io); diff --git a/hw/ipmi/pci_ipmi_kcs.c b/hw/ipmi/pci_ipmi_kcs.c index eeba63baa4..99f46152f4 100644 --- a/hw/ipmi/pci_ipmi_kcs.c +++ b/hw/ipmi/pci_ipmi_kcs.c @@ -54,6 +54,7 @@ static void pci_ipmi_lower_irq(IPMIKCS *ik) =20 static void pci_ipmi_kcs_realize(PCIDevice *pd, Error **errp) { + Error *err =3D NULL; PCIIPMIKCSDevice *pik =3D PCI_IPMI_KCS(pd); IPMIInterface *ii =3D IPMI_INTERFACE(pd); IPMIInterfaceClass *iic =3D IPMI_INTERFACE_GET_CLASS(ii); @@ -74,8 +75,9 @@ static void pci_ipmi_kcs_realize(PCIDevice *pd, Error **e= rrp) pik->kcs.raise_irq =3D pci_ipmi_raise_irq; pik->kcs.lower_irq =3D pci_ipmi_lower_irq; =20 - iic->init(ii, 8, errp); - if (*errp) { + iic->init(ii, 8, &err); + if (err) { + error_propagate(errp, err); return; } pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pik->kcs.io); --=20 2.21.0