clk: bcm: rpi: Prevent out-of-bounds access

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: clk: bcm: rpi: Prevent out-of-bounds access The while loop in raspberrypi_discover_clocks() relies on the assumption that the id of the last clock element is zero. Because this data comes from the Videocore firmware and it doesn't guarantuee such a behavior this could lead to out-of-bounds access. So fix this by providing a sentinel element.

References

• https://git.kernel.org/stable/c/fcae47b2d23c81603b01f56cf8db63ed64599d34
• https://git.kernel.org/stable/c/ff0b144d4b0a9fbd6efe4d2c0a4b6c9bae2138d2
• https://git.kernel.org/stable/c/c8b04b731d43366824841ebdca4ac715f95e0ea4
• https://git.kernel.org/stable/c/bc163555603e4ae9c817675ad80d618a4cdbfa2d