diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index c97f7940cb95..217bcbfde42e 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -349,6 +349,13 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) if (likely(!(fault & (VM_FAULT_ERROR | VM_FAULT_BADMAP | VM_FAULT_BADACCESS)))) return 0; + /* + * If we are in kernel mode at this point, we + * have no context to handle this fault with. + */ + if (!user_mode(regs)) + goto no_context; + if (fault & VM_FAULT_OOM) { /* * We ran out of memory, call the OOM killer, and return to @@ -359,13 +366,6 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) return 0; } - /* - * If we are in kernel mode at this point, we - * have no context to handle this fault with. - */ - if (!user_mode(regs)) - goto no_context; - if (fault & VM_FAULT_SIGBUS) { /* * We had some memory, but were unable to diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 6c8ba25bf6bb..0bb7db41f4fe 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -288,6 +288,13 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr, VM_FAULT_BADACCESS)))) return 0; + /* + * If we are in kernel mode at this point, we have no context to + * handle this fault with. + */ + if (!user_mode(regs)) + goto no_context; + if (fault & VM_FAULT_OOM) { /* * We ran out of memory, call the OOM killer, and return to @@ -298,13 +305,6 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr, return 0; } - /* - * If we are in kernel mode at this point, we have no context to - * handle this fault with. - */ - if (!user_mode(regs)) - goto no_context; - if (fault & VM_FAULT_SIGBUS) { /* * We had some memory, but were unable to successfully fix up diff --git a/arch/avr32/mm/fault.c b/arch/avr32/mm/fault.c index b2f2d2d66849..2ca27b055825 100644 --- a/arch/avr32/mm/fault.c +++ b/arch/avr32/mm/fault.c @@ -228,9 +228,9 @@ asmlinkage void do_page_fault(unsigned long ecr, struct pt_regs *regs) */ out_of_memory: up_read(&mm->mmap_sem); - pagefault_out_of_memory(); if (!user_mode(regs)) goto no_context; + pagefault_out_of_memory(); return; do_sigbus: diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c index 85df1cd8d446..94d3a31ab144 100644 --- a/arch/mips/mm/fault.c +++ b/arch/mips/mm/fault.c @@ -241,6 +241,8 @@ static void __kprobes __do_page_fault(struct pt_regs *regs, unsigned long write, * (which will retry the fault, or kill us if we got oom-killed). */ up_read(&mm->mmap_sem); + if (!user_mode(regs)) + goto no_context; pagefault_out_of_memory(); return; diff --git a/arch/um/kernel/trap.c b/arch/um/kernel/trap.c index 089f3987e273..b2f5adf838dd 100644 --- a/arch/um/kernel/trap.c +++ b/arch/um/kernel/trap.c @@ -124,6 +124,8 @@ int handle_page_fault(unsigned long address, unsigned long ip, * (which will retry the fault, or kill us if we got oom-killed). */ up_read(&mm->mmap_sem); + if (!is_user) + goto out_nosemaphore; pagefault_out_of_memory(); return 0; } diff --git a/arch/unicore32/mm/fault.c b/arch/unicore32/mm/fault.c index f9b5c10bccee..8ed3c4509d84 100644 --- a/arch/unicore32/mm/fault.c +++ b/arch/unicore32/mm/fault.c @@ -278,6 +278,13 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs) (VM_FAULT_ERROR | VM_FAULT_BADMAP | VM_FAULT_BADACCESS)))) return 0; + /* + * If we are in kernel mode at this point, we + * have no context to handle this fault with. + */ + if (!user_mode(regs)) + goto no_context; + if (fault & VM_FAULT_OOM) { /* * We ran out of memory, call the OOM killer, and return to @@ -288,13 +295,6 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs) return 0; } - /* - * If we are in kernel mode at this point, we - * have no context to handle this fault with. - */ - if (!user_mode(regs)) - goto no_context; - if (fault & VM_FAULT_SIGBUS) { /* * We had some memory, but were unable to