[ARM] 3030/2: fix permission check in the obscur cmpxchg syscall

[linux-2.6] / arch / arm / kernel / traps.c

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 10235b01582eb8fa2653d26e077536d4ffab0a75..d566d5f4574d051e5feb3d1ed2f62f72bf604b59 100644 (file)
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -19,6 +19,7 @@
 #include <linux/personality.h>
 #include <linux/ptrace.h>
 #include <linux/kallsyms.h>
+#include <linux/delay.h>
 #include <linux/init.h>
 
 #include <asm/atomic.h>
@@ -231,6 +232,13 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
        __die(str, err, thread, regs);
        bust_spinlocks(0);
        spin_unlock_irq(&die_lock);
+
+       if (panic_on_oops) {
+               printk(KERN_EMERG "Fatal exception: panic in 5 seconds\n");
+               ssleep(5);
+               panic("Fatal exception");
+       }
+
        do_exit(SIGSEGV);
 }
 
@@ -498,7 +506,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
                if (!pmd_present(*pmd))
                        goto bad_access;
                pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
-               if (!pte_present(*pte) || !pte_write(*pte)) {
+               if (!pte_present(*pte) || !pte_dirty(*pte)) {
                        pte_unmap_unlock(pte, ptl);
                        goto bad_access;
                }