General Protection Fault - Miscellaneous

Miscellaneous

Other causes of general protection faults are:

• attempting to access an interrupt/exception handler from v86 mode when the handler's code segment descriptor privilege level (DPL) is greater than zero
• attempting to write a one into the reserved bits of CR4
• attempting to execute privileged instructions when the current privilege level (CPL) is not zero
• writing to a reserved bit in an MSR instruction
• accessing a gate containing a null segment selector
• executing a software interrupt when the CPL is greater than the DPL set for the interrupt gate
• the segment selector in a call, interrupt or trap gate does not point to a code segment
• exceeding the instruction length of 15 bytes
• violating privilege rules
• enabling paging whilst disabling protection
• referencing the interrupt descriptor table following an interrupt or exception that is not an interrupt, trap, or a task gate
• Legacy SSE: Memory operand is not 16-byte aligned.