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Sat, 19 Sep 2026 01:33:21 +0000 (GMT) Received: from li-4c4c4544-0054-3910-8039-c3c04f423534.ibm.com.com (unknown [9.61.101.145]) by smtpav02.dal12v.mail.ibm.com (Postfix) with ESMTP; Sat, 19 Sep 2026 01:33:21 +0000 (GMT) From: Tyrel Datwyler To: james.bottomley@hansenpartnership.com, martin.petersen@oracle.com Cc: linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, brking@linux.ibm.com, davemarq@linux.ibm.com, Tyrel Datwyler Subject: [PATCH v2 15/20] scsi: ibmvfc: unregister NVMe local port on adapter removal Date: Fri, 18 Sep 2026 18:33:01 -0700 Message-ID: <20260919013306.2948028-16-tyreld@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260919013306.2948028-1-tyreld@linux.ibm.com> References: <20260919013306.2948028-1-tyreld@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE5MDAxOCBTYWx0ZWRfX/FqsA9kZCGV5 yutD1ntOLAzn0KWA+21JUspHF+LIYrq0PSJvuInj5HiKHFw4e4YSEd0XGZc0CFujXb1k9pHRjV8 mEAKpa8c4VmYQlw/tA+JW7kq70bkOiXh3ye4bbD9ljh2W6pINdCF4jCUJTCVYBdmEPPwks3ZyqX eiHSlb4+PgwFF7r4KDl3LXsCDB+MrCI82+vekYEg3qoQRgt0gW7LMU3nFvqZQb9LuccrD9BzyVN W0h77hD5XukvdvKxgQGqKaiArAIuqNw1K0eG2vfmrN/TtLwEV0fyrzO8TEyRD95WSfhPzaUUwmC z7hGqzTnXR3qwicX6+AYs3nH9VVyrODO3ms3InyOtEHJldHt6iVliFXWIndD5WJJ8a+gjzVsHfd bqW2A6SBE8Up5UXBPC23jjkvIx3RKLzgpdGc2/6V7Lt0PdWd8pb+7AYc5EOjoVHxjmfjPCkaCPu DU40xxVjTekK5H0iQBQ== X-Proofpoint-ORIG-GUID: 4PerKHZR_iOQ9sHzWzK6yRKUHRNtvq6a X-Proofpoint-GUID: 4PerKHZR_iOQ9sHzWzK6yRKUHRNtvq6a X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE5MDAxOCBTYWx0ZWRfX+RkkVwc2/Epb pYTeNEvRQig0lBgsZvpHL2GV4OQkjXOUs6zBsGG3KhdPnS02OlHSH5lOwIhy+FLoiTIXEqbXWcd iIRA/bx/rxb5EEH3Avedi1NTHdlGbQQ= X-Authority-Analysis: v=2.4 cv=cY9HPXDM c=1 sm=1 tr=0 ts=6aade664 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=ETEOwY9weeunu4j8P0UA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-18_07,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 bulkscore=0 clxscore=1015 suspectscore=0 impostorscore=0 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609190018 ibmvfc_remove() tears down the CRQ and frees all host memory but never calls ibmvfc_nvme_unregister(). The NVMe-FC transport therefore retains a live reference to the local port whose private pointer points into the now-freed ibmvfc_host, leading to a use-after-free whenever the transport subsequently touches the port (queue creation, port scanning, etc.). ibmvfc_nvme_unregister() is already called from the NPIV logout and host reset paths during normal operation; driver removal simply missed it. Add the call after ibmvfc_release_crq_queue() — at which point the CRQ is torn down so no further completions can arrive — and before ibmvfc_free_mem(), so host memory is still valid while nvme_fc_unregister_localport() runs and waits for the localport_delete callback to complete. Fixes: 86e495358096 ("scsi: ibmvfc: implement LLDD callbacks for mapping nvme-fc queues") Signed-off-by: Tyrel Datwyler --- drivers/scsi/ibmvscsi/ibmvfc-core.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/scsi/ibmvscsi/ibmvfc-core.c b/drivers/scsi/ibmvscsi/ibmvfc-core.c index 080312ff0a93..e68ed5e79e58 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc-core.c +++ b/drivers/scsi/ibmvscsi/ibmvfc-core.c @@ -6976,6 +6976,7 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) static void ibmvfc_remove(struct vio_dev *vdev) { struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); + struct ibmvfc_target *tgt, *tgt_tmp; LIST_HEAD(purge); unsigned long flags; @@ -6992,6 +6993,22 @@ static void ibmvfc_remove(struct vio_dev *vdev) fc_remove_host(vhost->host); scsi_remove_host(vhost->host); + list_for_each_entry_safe(tgt, tgt_tmp, &vhost->nvme_scrqs.targets, queue) { + if (tgt->nvme_remote_port) + ibmvfc_nvme_unregister_remoteport(tgt); + list_del(&tgt->queue); + timer_delete_sync(&tgt->timer); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } + + list_for_each_entry_safe(tgt, tgt_tmp, &vhost->scsi_scrqs.targets, queue) { + if (tgt->rport) + fc_remote_port_delete(tgt->rport); + list_del(&tgt->queue); + timer_delete_sync(&tgt->timer); + kref_put(&tgt->kref, ibmvfc_release_tgt); + } + spin_lock_irqsave(&vhost->host->host_lock, flags); ibmvfc_purge_requests(vhost, DID_ERROR); list_splice_init(&vhost->purge, &purge); @@ -7000,6 +7017,8 @@ static void ibmvfc_remove(struct vio_dev *vdev) ibmvfc_release_sub_crqs(vhost); ibmvfc_release_crq_queue(vhost); + ibmvfc_nvme_unregister(vhost); + ibmvfc_free_mem(vhost); spin_lock(&ibmvfc_driver_lock); list_del(&vhost->queue); -- 2.55.0