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Thu, 19 Mar 2026 13:25:55 -0700 (PDT) Received: from LQ5W56KC4T ([2001:8a0:672f:7800:e0e1:55cd:f0b:b1e5]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b644ae16fsm1347544f8f.8.2026.03.19.13.25.54 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 19 Mar 2026 13:25:55 -0700 (PDT) From: Eric Curtin X-Google-Original-From: Eric Curtin To: linux-hyperv@vger.kernel.org Cc: linux-kernel@vger.kernel.org, iourit@linux.microsoft.com, wei.liu@kernel.org, decui@microsoft.com, haiyangz@microsoft.com Subject: [PATCH 37/55] drivers: hv: dxgkrnl: Added missed NULL check for resource object Date: Thu, 19 Mar 2026 20:24:51 +0000 Message-ID: <20260319202509.63802-38-eric.curtin@docker.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260319202509.63802-1-eric.curtin@docker.com> References: <20260319202509.63802-1-eric.curtin@docker.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Iouri Tarassov Signed-off-by: Iouri Tarassov [kms: forward port to 6.6 from 6.1. No code changes made.] Signed-off-by: Kelsey Steele --- drivers/hv/dxgkrnl/ioctl.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/hv/dxgkrnl/ioctl.c b/drivers/hv/dxgkrnl/ioctl.c index 69324510c9e2..98350583943e 100644 --- a/drivers/hv/dxgkrnl/ioctl.c +++ b/drivers/hv/dxgkrnl/ioctl.c @@ -1589,7 +1589,8 @@ dxgkio_create_allocation(struct dxgprocess *process, void *__user inargs) &process->handle_table, HMGRENTRY_TYPE_DXGRESOURCE, args.resource); - kref_get(&resource->resource_kref); + if (resource != NULL) + kref_get(&resource->resource_kref); dxgprocess_ht_lock_shared_up(process); if (resource == NULL || resource->device != device) { @@ -1693,10 +1694,8 @@ dxgkio_create_allocation(struct dxgprocess *process, void *__user inargs) &standard_alloc); cleanup: - if (resource_mutex_acquired) { + if (resource_mutex_acquired) mutex_unlock(&resource->resource_mutex); - kref_put(&resource->resource_kref, dxgresource_release); - } if (ret < 0) { if (dxgalloc) { for (i = 0; i < args.alloc_count; i++) { @@ -1727,6 +1726,9 @@ dxgkio_create_allocation(struct dxgprocess *process, void *__user inargs) if (adapter) dxgadapter_release_lock_shared(adapter); + if (resource && !args.flags.create_resource) + kref_put(&resource->resource_kref, dxgresource_release); + if (device) { dxgdevice_release_lock_shared(device); kref_put(&device->device_kref, dxgdevice_release);