LoongArch: Move jump_label_init() before parse_early_param()

Overview

In the Linux kernel, the following vulnerability has been resolved:

LoongArch: Move jump_label_init() before parse_early_param()

When enabling both CONFIG_MEM_ALLOC_PROFILING=y and CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT=y, then diabling memory profiling by adding the boot parameter 'sysctl.vm.mem_profiling=0' will cause the kernel failed to boot.

After analysis, this is because jump_label_init() must be called before parse_early_param(), the early param handlers may modify static keys by static_branch_enable/disable().

Fix this by moving jump_label_init() to before parse_early_param(). The solution is similar to other architectures.

Affected

• Linux >= 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 < 1d0b99ef7fcb6cef1df273872059bf854814500e
• Linux >= 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 < 4b40e590efb350c54480d7e883f054d3609a94c6
• Linux >= 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 < 38b025fcdc45bdf5140a5726a1fbb2e694ea047b
• Linux >= 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 < 881e9f3c4e117b100880b1c5de3a0da8e455a78f
• Linux >= 628c3bb40e9a8cefc0a6fde28b7b66bfe46d1dc2 < ea68d444a658783234a06f05414e41cf93a18fb2
• Linux 5.19

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.