usb: typec: fix potential out of bounds in ucsi_ccg_update_set_new_cam_cmd()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: fix potential out of bounds in ucsi_ccg_update_set_new_cam_cmd() The "*cmd" variable can be controlled by the user via debugfs. That means "new_cam" can be as high as 255 while the size of the uc->updated[] array is UCSI_MAX_ALTMODES (30). The call tree is: ucsi_cmd() // val comes from simple_attr_write_xsigned() -> ucsi_send_command() -> ucsi_send_command_common() -> ucsi_run_command() // calls ucsi->ops->sync_control() -> ucsi_ccg_sync_control()

References

• https://git.kernel.org/stable/c/d76923164705821aa1b01b8d9d1741f20c654ab4
• https://git.kernel.org/stable/c/8f47984b35f3be0cfc652c2ca358d5768ea3456b
• https://git.kernel.org/stable/c/604314ecd682913925980dc955caea2d036eab5f
• https://git.kernel.org/stable/c/69e19774f15e12dda6c6c58001d059e30895009b
• https://git.kernel.org/stable/c/3a2ba841659a0f15102585120dea75d8d5209616
• https://git.kernel.org/stable/c/7dd08a0b4193087976db6b3ee7807de7e8316f96