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Thu, 17 Dec 2020 14:59:03 +0000 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0BHEx2Q821561752 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 17 Dec 2020 14:59:02 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1E0326E053; Thu, 17 Dec 2020 14:59:02 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0F4186E04C; Thu, 17 Dec 2020 14:59:01 +0000 (GMT) Received: from oc4221205838.ibm.com (unknown [9.211.143.229]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 17 Dec 2020 14:59:00 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=QEIR9pogHombf8rr59M2NB/yM19mYZSwKConFwUYMG0=; b=fpbf1x2KvXtSQrAODGuXcWZzL5GhwXxlJwO8AiIygvrfiux5B6lNeBYjhFy1Tw9u3wqb v6u1UW/Jv2nWsHw5AunV5/zUWjwj0AXMR21Lfow5+8FXkXVtU24RZFDrcGnmT9+ueLcy C0m5nmmy5g21rgQ/wfYLT6FsjvbjQANiz8wnm1U4OIuux33aHUE2cJbxBC8EIFAl+5Fc kbX4meNzKcn0gKmJNrqQ6/cDHr3M8HMgBB+IjogIfE/CdcFe7U3D3W6uZuLeG4BS1Jrz bFyqPxccmGCLSGs0jN+7bzVRj9Hm4nJdGgSg5cB4pPFt87GHPfbTPTfRJjEfFsqhreHO kw== From: Matthew Rosato To: cohuck@redhat.com, thuth@redhat.com Subject: [PATCH 1/2] s390x/pci: fix pcistb length Date: Thu, 17 Dec 2020 09:58:55 -0500 Message-Id: <1608217136-5690-2-git-send-email-mjrosato@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1608217136-5690-1-git-send-email-mjrosato@linux.ibm.com> References: <1608217136-5690-1-git-send-email-mjrosato@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-17_09:2020-12-15, 2020-12-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 suspectscore=0 spamscore=0 mlxlogscore=982 priorityscore=1501 bulkscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012170099 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" In pcistb_service_call, we are grabbing 8 bits from a guest register to indicate the length of the store operation -- but per the architecture the length is actually defined by 13 bits of the guest register. Fixes: 863f6f52b7 ("s390: implement pci instructions") Signed-off-by: Matthew Rosato Reviewed-by: Pierre Morel --- hw/s390x/s390-pci-inst.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c index d9e1e29..e230293 100644 --- a/hw/s390x/s390-pci-inst.c +++ b/hw/s390x/s390-pci-inst.c @@ -755,7 +755,7 @@ int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8= _t r3, uint64_t gaddr, int i; uint32_t fh; uint8_t pcias; - uint8_t len; + uint16_t len; uint8_t buffer[128]; =20 if (env->psw.mask & PSW_MASK_PSTATE) { @@ -765,7 +765,7 @@ int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8= _t r3, uint64_t gaddr, =20 fh =3D env->regs[r1] >> 32; pcias =3D (env->regs[r1] >> 16) & 0xf; - len =3D env->regs[r1] & 0xff; + len =3D env->regs[r1] & 0x1fff; offset =3D env->regs[r3]; =20 if (!(fh & FH_MASK_ENABLE)) { --=20 1.8.3.1 From nobody Sat May 18 22:31:09 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Thu, 17 Dec 2020 15:00:20 +0000 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0BHEx3H216318910 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 17 Dec 2020 14:59:03 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2E4736E052; Thu, 17 Dec 2020 14:59:03 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 420C16E04E; Thu, 17 Dec 2020 14:59:02 +0000 (GMT) Received: from oc4221205838.ibm.com (unknown [9.211.143.229]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 17 Dec 2020 14:59:02 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=pp1; bh=2hHjAsYNeO3VDmOsMoaF2fCOAvAkCmD3evtAlrh1DDo=; b=Wb+HTUiCc0WjenpKXZQdA+wq2Fkxf5GPnWEqkG0f0pbq7f7QrixS3iCDyGJdH5twtxiq DMjZQxKGHRJlwNBCBIrX9/BLL852b2mGOWaCwTx45DpsZ707KtvOxulGc2eJHQOrzs5e gC1atL7CivWxXUO7lgQlm9nqH9JZ47Q0cQgGbLrYOt19MJqlHW13Uz7VCGutvC8hX2Be IabO49ef/3kbHAhNqXjxwvVtda7I5QCTskjhuQzkBjpNELRW6nRxKs7vliskZ0+lyqvP fuy0Q+BzY5tOpMP4JLTmvJCu5uhdmTwNSuk0HEe8+FJdSX5jhsenD2+02CiPbYNrUMC0 Mw== From: Matthew Rosato To: cohuck@redhat.com, thuth@redhat.com Subject: [PATCH 2/2] s390x/pci: Fix memory_region_access_valid call Date: Thu, 17 Dec 2020 09:58:56 -0500 Message-Id: <1608217136-5690-3-git-send-email-mjrosato@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1608217136-5690-1-git-send-email-mjrosato@linux.ibm.com> References: <1608217136-5690-1-git-send-email-mjrosato@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-17_09:2020-12-15, 2020-12-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 clxscore=1015 suspectscore=0 mlxlogscore=903 spamscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012170099 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=148.163.156.1; envelope-from=mjrosato@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, 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: pmorel@linux.ibm.com, david@redhat.com, richard.henderson@linaro.org, qemu-devel@nongnu.org, pasic@linux.ibm.com, borntraeger@de.ibm.com, qemu-s390x@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" In pcistb_service_handler, a call is made to validate that the memory region can be accessed. However, the call is made using the entire length of the pcistb operation, which can be larger than the allowed memory access size (8). Since we already know that the provided buffer is a multiple of 8, fix the call to memory_region_access_valid to iterate over the memory region in the same way as the subsequent call to memory_region_dispatch_write. Fixes: 863f6f52b7 ("s390: implement pci instructions") Signed-off-by: Matthew Rosato --- hw/s390x/s390-pci-inst.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c index e230293..f93f8ba 100644 --- a/hw/s390x/s390-pci-inst.c +++ b/hw/s390x/s390-pci-inst.c @@ -821,10 +821,12 @@ int pcistb_service_call(S390CPU *cpu, uint8_t r1, uin= t8_t r3, uint64_t gaddr, mr =3D s390_get_subregion(mr, offset, len); offset -=3D mr->addr; =20 - if (!memory_region_access_valid(mr, offset, len, true, - MEMTXATTRS_UNSPECIFIED)) { - s390_program_interrupt(env, PGM_OPERAND, ra); - return 0; + for (i =3D 0; i < len / 8; i++) { + if (!memory_region_access_valid(mr, offset + i * 8, 8, true, + MEMTXATTRS_UNSPECIFIED)) { + s390_program_interrupt(env, PGM_OPERAND, ra); + return 0; + } } =20 if (s390_cpu_virt_mem_read(cpu, gaddr, ar, buffer, len)) { --=20 1.8.3.1