EDAC/bluefield: Fix potential integer overflow

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: EDAC/bluefield: Fix potential integer overflow The 64-bit argument for the "get DIMM info" SMC call consists of mem_ctrl_idx left-shifted 16 bits and OR-ed with DIMM index. With mem_ctrl_idx defined as 32-bits wide the left-shift operation truncates the upper 16 bits of information during the calculation of the SMC argument. The mem_ctrl_idx stack variable must be defined as 64-bits wide to prevent any potential integer overflow, i.e. loss of data from upper 16 bits.

References

• https://git.kernel.org/stable/c/8cc31cfa36ff37aff399b72faa2ded58110112ae
• https://git.kernel.org/stable/c/e0269ea7a628fdeddd65b92fe29c09655dbb80b9
• https://git.kernel.org/stable/c/4ad7033de109d0fec99086f352f58a3412e378b8
• https://git.kernel.org/stable/c/578ca89b04680145d41011e7cec8806fefbb59e7
• https://git.kernel.org/stable/c/ac6ebb9edcdb7077e841862c402697c4c48a7c0a
• https://git.kernel.org/stable/c/fdb90006184aa84c7b4e09144ed0936d4e1891a7
• https://git.kernel.org/stable/c/000930193fe5eb79ce5563ee2e9ddb0c6e4e1bb5
• https://git.kernel.org/stable/c/1fe774a93b46bb029b8f6fa9d1f25affa53f06c6