diff options
| -rw-r--r-- | arch/riscv/mm/fault.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 0d5f06d6e3c7..33d284188f9a 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -243,6 +243,11 @@ asmlinkage void do_page_fault(struct pt_regs *regs) if (user_mode(regs)) flags |= FAULT_FLAG_USER; + if (!user_mode(regs) && addr < TASK_SIZE && + unlikely(!(regs->status & SR_SUM))) + die_kernel_fault("access to user memory without uaccess routines", + addr, regs); + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr); if (cause == EXC_STORE_PAGE_FAULT) |