6.15-stable review patch. If anyone has any objections, please let me know.
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From: Yuhao Jiang danisjiang@gmail.com
commit 62783c30d78aecf9810dae46fd4d11420ad38b74 upstream.
In hidg_bind(), if alloc_workqueue() fails after usb_assign_descriptors() has successfully allocated the USB descriptors, the current error handling does not call usb_free_all_descriptors() to free the allocated descriptors, resulting in a memory leak.
Restructure the error handling by adding proper cleanup labels: - fail_free_all: cleans up workqueue and descriptors - fail_free_descs: cleans up descriptors only - fail: original cleanup for earlier failures
This ensures that allocated resources are properly freed in reverse order of their allocation, preventing the memory leak when alloc_workqueue() fails.
Fixes: a139c98f760ef ("USB: gadget: f_hid: Add GET_REPORT via userspace IOCTL") Cc: stable@vger.kernel.org Signed-off-by: Yuhao Jiang danisjiang@gmail.com Link: https://lore.kernel.org/r/20250623094844.244977-1-danisjiang@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/function/f_hid.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/usb/gadget/function/f_hid.c +++ b/drivers/usb/gadget/function/f_hid.c @@ -1275,18 +1275,19 @@ static int hidg_bind(struct usb_configur
if (!hidg->workqueue) { status = -ENOMEM; - goto fail; + goto fail_free_descs; }
/* create char device */ cdev_init(&hidg->cdev, &f_hidg_fops); status = cdev_device_add(&hidg->cdev, &hidg->dev); if (status) - goto fail_free_descs; + goto fail_free_all;
return 0; -fail_free_descs: +fail_free_all: destroy_workqueue(hidg->workqueue); +fail_free_descs: usb_free_all_descriptors(f); fail: ERROR(f->config->cdev, "hidg_bind FAILED\n");