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HID: intel-ish-hid: ipc: Fix dev_err usage with uninitialized dev->devc

Message ID 20240306004404.2770417-1-lixu.zhang@intel.com
State New
Headers show
Series HID: intel-ish-hid: ipc: Fix dev_err usage with uninitialized dev->devc | expand

Commit Message

Zhang, Lixu March 6, 2024, 12:44 a.m. UTC 
From: Zhang Lixu <lixu.zhang@intel.com>

The variable dev->devc in ish_dev_init was utilized by dev_err before it
was properly assigned. To rectify this, the assignment of dev->devc has
been moved to immediately follow memory allocation.

Without this change "(NULL device *)" is printed for device information.

Fixes: 8ae2f2b0a284 ("HID: intel-ish-hid: ipc: Fix potential use-after-free in work function")
Fixes: ae02e5d40d5f ("HID: intel-ish-hid: ipc layer")
Signed-off-by: Zhang Lixu <lixu.zhang@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/hid/intel-ish-hid/ipc/ipc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c
index 7cc412798fdf..adce30f8ebff 100644
--- a/drivers/hid/intel-ish-hid/ipc/ipc.c
+++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
@@ -948,6 +948,7 @@  struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
 	if (!dev)
 		return NULL;
 
+	dev->devc = &pdev->dev;
 	ishtp_device_init(dev);
 
 	init_waitqueue_head(&dev->wait_hw_ready);
@@ -983,7 +984,6 @@  struct ishtp_device *ish_dev_init(struct pci_dev *pdev)
 	}
 
 	dev->ops = &ish_hw_ops;
-	dev->devc = &pdev->dev;
 	dev->mtu = IPC_PAYLOAD_SIZE - sizeof(struct ishtp_msg_hdr);
 	return dev;
 }