usb: gadget : fix use-after-free in composite_dev_cleanup()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget : fix use-after-free in composite_dev_cleanup() 1. In func configfs_composite_bind() -> composite_os_desc_req_prepare(): if kmalloc fails, the pointer cdev->os_desc_req will be freed but not set to NULL. Then it will return a failure to the upper-level function. 2. in func configfs_composite_bind() -> composite_dev_cleanup(): it will checks whether cdev->os_desc_req is NULL. If it is not NULL, it will attempt to use it.This will lead to a use-after-free issue. BUG: KASAN: use-after-free in composite_dev_cleanup+0xf4/0x2c0 Read of size 8 at addr 0000004827837a00 by task init/1 CPU: 10 PID: 1 Comm: init Tainted: G O 5.10.97-oh #1 kasan_report+0x188/0x1cc __asan_load8+0xb4/0xbc composite_dev_cleanup+0xf4/0x2c0 configfs_composite_bind+0x210/0x7ac udc_bind_to_driver+0xb4/0x1ec usb_gadget_probe_driver+0xec/0x21c gadget_dev_desc_UDC_store+0x264/0x27c

References

• https://git.kernel.org/stable/c/dba96dfa5a0f685b959dd28a52ac8dab0b805204
• https://git.kernel.org/stable/c/2db29235e900a084a656dea7e0939b0abb7bb897
• https://git.kernel.org/stable/c/8afb22aa063f706f3343707cdfb8cda4d021dd33
• https://git.kernel.org/stable/c/e624bf26127645a2f7821e73fdf6dc64bad07835
• https://git.kernel.org/stable/c/aada327a9f8028c573636fa60c0abc80fb8135c9
• https://git.kernel.org/stable/c/5f06ee9f9a3665d43133f125c17e5258a13f3963
• https://git.kernel.org/stable/c/bd3c4ef60baf7f65c963f3e12d9d7b2b091e20ba
• https://git.kernel.org/stable/c/e1be1f380c82a69f80c68c96a7cfe8759fb30355
• https://git.kernel.org/stable/c/151c0aa896c47a4459e07fee7d4843f44c1bb18e