[PATCH 2/2] HID: Intel-thc-hid: Intel-quickspi: Use hid_safe_input_report()
From: Even Xu <even.xu@intel.com>
Date: 2026-09-22 02:54:32
Also in:
lkml
Subsystem:
hid core layer, intel touch host controller (thc) driver, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Even Xu, Xinpeng Sun, Linus Torvalds
Replace the deprecated hid_input_report() with
hid_safe_input_report(), which takes the allocated size of the input
report buffer and allows hid-core to validate the reported data length
against the actual buffer size.
Track the allocated size of qsdev->input_buf in the new input_len
field and pass it through quickspi_hid_send_report() to
hid_safe_input_report() to prevent potential out-of-bounds reads.
Fixes: 0a3fe972a7cb ("HID: core: Mitigate potential OOB by removing bogus memset()")
Signed-off-by: Even Xu <even.xu@intel.com>
---
drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c | 2 ++
drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h | 2 ++
drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c | 6 ++++--
drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.h | 2 +-
.../hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c | 2 +-
5 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c b/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c
index ad676fde211b..53023e30cf8d 100644
--- a/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c
+++ b/drivers/hid/intel-thc-hid/intel-quickspi/pci-quickspi.c@@ -557,6 +557,8 @@ static int quickspi_alloc_report_buf(struct quickspi_device *qsdev) if (!qsdev->input_buf) return -ENOMEM; + qsdev->input_len = max_input_len; + max_report_len = max(le16_to_cpu(qsdev->dev_desc.max_output_len), le16_to_cpu(qsdev->dev_desc.max_input_len));
diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h
index dc67a39ad546..fe51ff51d8c0 100644
--- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h
+++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-dev.h@@ -113,6 +113,7 @@ struct acpi_device; * @low_power_ltr_val: THC low power LTR value * @report_descriptor: store a copy of device report descriptor * @input_buf: store a copy of latest input report data + * @input_len: the data size of the input report buffer * @report_buf: store a copy of latest input/output report packet from set/get feature * @report_len: the length of input/output report packet * @reset_ack_wq: workqueue for waiting reset response from device
@@ -159,6 +160,7 @@ struct quickspi_device { u8 *report_descriptor; u8 *input_buf; + u32 input_len; u8 *report_buf; u32 report_buf_size; u32 report_len;
diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c
index a60a0a7f16aa..ed1c40b8c4fa 100644
--- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c
+++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.c@@ -148,16 +148,18 @@ void quickspi_hid_remove(struct quickspi_device *qsdev) * * @qsdev: point to quickspi device * @data: point to input report data buffer + * @buf_size: the allocated size of the input report data buffer * @data_len: the length of input report data * * Return: 0 on success, non zero on error. */ int quickspi_hid_send_report(struct quickspi_device *qsdev, - void *data, size_t data_len) + void *data, size_t buf_size, size_t data_len) { int ret; - ret = hid_input_report(qsdev->hid_dev, HID_INPUT_REPORT, data, data_len, 1); + ret = hid_safe_input_report(qsdev->hid_dev, HID_INPUT_REPORT, data, + buf_size, data_len, 1); if (ret) dev_err(qsdev->dev, "Failed to send HID input report, ret = %d.\n", ret);
diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.h b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.h
index f640fa876a40..61b7c6be6c51 100644
--- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.h
+++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-hid.h@@ -7,7 +7,7 @@ struct quickspi_device; int quickspi_hid_send_report(struct quickspi_device *qsdev, - void *data, size_t data_size); + void *data, size_t buf_size, size_t data_size); int quickspi_hid_probe(struct quickspi_device *qsdev); void quickspi_hid_remove(struct quickspi_device *qsdev);
diff --git a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c
index 847c5ec55569..0df33c44fbff 100644
--- a/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c
+++ b/drivers/hid/intel-thc-hid/intel-quickspi/quickspi-protocol.c@@ -240,7 +240,7 @@ void quickspi_handle_input_data(struct quickspi_device *qsdev, u32 buf_len) input_len = sizeof(body_hdr->content_id) + input_len; input_report = input_body->content - sizeof(body_hdr->content_id); - ret = quickspi_hid_send_report(qsdev, input_report, input_len); + ret = quickspi_hid_send_report(qsdev, input_report, qsdev->input_len, input_len); if (ret) dev_err_once(qsdev->dev, "Failed to send HID input report: %d\n", ret);
--
2.43.0