usb: potential integer overflow in usbg_make_tpg()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: usb: potential integer overflow in usbg_make_tpg() The variable tpgt in usbg_make_tpg() is defined as unsigned long and is assigned to tpgt->tport_tpgt, which is defined as u16. This may cause an integer overflow when tpgt is greater than USHRT_MAX (65535). I haven't tried to trigger it myself, but it is possible to trigger it by calling usbg_make_tpg() with a large value for tpgt. I modified the type of tpgt to match tpgt->tport_tpgt and adjusted the relevant code accordingly. This patch is similar to commit 59c816c1f24d ("vhost/scsi: potential memory corruption").

References

• https://git.kernel.org/stable/c/0861b9cb2ff519b7c5a3b1dd52a343e18c4efb24
• https://git.kernel.org/stable/c/603a83e5fee38a950bfcfb2f36449311fa00a474
• https://git.kernel.org/stable/c/6f77e344515b5258edb3988188311464209b1c7c
• https://git.kernel.org/stable/c/6722e080b5b39ab7471386c73d0c1b39572f943c
• https://git.kernel.org/stable/c/a33f507f36d5881f602dab581ab0f8d22b49762c
• https://git.kernel.org/stable/c/358d5ba08f1609c34a054aed88c431844d09705a
• https://git.kernel.org/stable/c/620a5e1e84a3a7004270703a118d33eeb1c0f368
• https://git.kernel.org/stable/c/153874010354d050f62f8ae25cbb960c17633dc5