CVE-2026-98248

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

arm64: percpu: Fix LSE operations on {8,16}-bit types

The assembly for __percpu_##name##_case_##sz() and

__percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro

argument to form the LSE instruction. Without 'sfx', a W register

argument will imply a 32-bit memory location, and consequently

{8,16}-bit ops will erroneously read and write 32 bits of memory when

the LSE instruction is used.

Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not

necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is

a register-register operation which does not access memory (and does not

take a size suffix).