From b3279c7fd7acf807ab8395d16658514e8c222a37 Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Wed, 30 Jan 2008 13:34:10 +0100 Subject: [PATCH] x86: introduce show_fault_oops helper to fault_32|64.c This will help when unifying the oops dumping code on 32/64 bit. No functional changes. Signed-off-by: Harvey Harrison Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/mm/fault_32.c | 54 +++++++++++++++++++++++------------------- arch/x86/mm/fault_64.c | 21 ++++++++++------ 2 files changed, 44 insertions(+), 31 deletions(-) diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c index 0bd241729a..fda3997588 100644 --- a/arch/x86/mm/fault_32.c +++ b/arch/x86/mm/fault_32.c @@ -323,6 +323,35 @@ static int is_f00f_bug(struct pt_regs *regs, unsigned long address) return 0; } +static void show_fault_oops(struct pt_regs *regs, unsigned long error_code, + unsigned long address) +{ + if (!oops_may_print()) + return; + +#ifdef CONFIG_X86_PAE + if (error_code & PF_INSTR) { + int level; + pte_t *pte = lookup_address(address, &level); + + if (pte && pte_present(*pte) && !pte_exec(*pte)) + printk(KERN_CRIT "kernel tried to execute " + "NX-protected page - exploit attempt? " + "(uid: %d)\n", current->uid); + } +#endif + if (address < PAGE_SIZE) + printk(KERN_ALERT "BUG: unable to handle kernel NULL " + "pointer dereference"); + else + printk(KERN_ALERT "BUG: unable to handle kernel paging" + " request"); + printk(" at virtual address %08lx\n", address); + printk(KERN_ALERT "printing ip: %08lx ", regs->ip); + + dump_pagetable(address); +} + /* * Handle a fault on the vmalloc or module mapping area * @@ -633,30 +662,7 @@ no_context: bust_spinlocks(1); - if (oops_may_print()) { - -#ifdef CONFIG_X86_PAE - if (error_code & PF_INSTR) { - int level; - pte_t *pte = lookup_address(address, &level); - - if (pte && pte_present(*pte) && !pte_exec(*pte)) - printk(KERN_CRIT "kernel tried to execute " - "NX-protected page - exploit attempt? " - "(uid: %d)\n", current->uid); - } -#endif - if (address < PAGE_SIZE) - printk(KERN_ALERT "BUG: unable to handle kernel NULL " - "pointer dereference"); - else - printk(KERN_ALERT "BUG: unable to handle kernel paging" - " request"); - printk(" at virtual address %08lx\n", address); - printk(KERN_ALERT "printing ip: %08lx ", regs->ip); - - dump_pagetable(address); - } + show_fault_oops(regs, error_code, address); tsk->thread.cr2 = address; tsk->thread.trap_no = 14; diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c index ccbb8e30d9..1897704dad 100644 --- a/arch/x86/mm/fault_64.c +++ b/arch/x86/mm/fault_64.c @@ -293,6 +293,18 @@ static int is_f00f_bug(struct pt_regs *regs, unsigned long address) return 0; } +static void show_fault_oops(struct pt_regs *regs, unsigned long error_code, + unsigned long address) +{ + if (address < PAGE_SIZE) + printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); + else + printk(KERN_ALERT "Unable to handle kernel paging request"); + printk(" at %016lx RIP: \n" KERN_ALERT, address); + printk_address(regs->ip, 1); + dump_pagetable(address); +} + static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs, unsigned long error_code) { @@ -636,13 +648,8 @@ no_context: flags = oops_begin(); - if (address < PAGE_SIZE) - printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference"); - else - printk(KERN_ALERT "Unable to handle kernel paging request"); - printk(" at %016lx RIP: \n" KERN_ALERT, address); - printk_address(regs->ip, 1); - dump_pagetable(address); + show_fault_oops(regs, error_code, address); + tsk->thread.cr2 = address; tsk->thread.trap_no = 14; tsk->thread.error_code = error_code; -- 2.39.5