diff options
Diffstat (limited to 'arch/x86/mm/fault.c')
| -rw-r--r-- | arch/x86/mm/fault.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 0b03ae8c39cd..53db18615f31 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -786,6 +786,8 @@ __bad_area_nosemaphore(struct pt_regs *regs, unsigned long error_code, force_sig_fault(SIGSEGV, si_code, (void __user *)address); + local_irq_disable(); + return; } @@ -1384,9 +1386,18 @@ do_page_fault(struct pt_regs *regs, unsigned long hw_error_code, return; /* Was the fault on kernel-controlled part of the address space? */ - if (unlikely(fault_in_kernel_space(address))) + if (unlikely(fault_in_kernel_space(address))) { do_kern_addr_fault(regs, hw_error_code, address); - else + } else { do_user_addr_fault(regs, hw_error_code, address); + /* + * User address page fault handling might have reenabled + * interrupts. Fixing up all potential exit points of + * do_user_addr_fault() and its leaf functions is just not + * doable w/o creating an unholy mess or turning the code + * upside down. + */ + local_irq_disable(); + } } NOKPROBE_SYMBOL(do_page_fault); |