kmemcheck: add mm functions

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ca989158e847936e893c7110b4a328ea1549d452..994dd6a4a2a004bcb5d91955fb921ac8c303eb3d 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -8,12 +8,15 @@
 #include <linux/module.h>
 #include <linux/pm.h>
 #include <linux/clockchips.h>
+#include <linux/random.h>
 #include <trace/power.h>
 #include <asm/system.h>
 #include <asm/apic.h>
+#include <asm/syscalls.h>
 #include <asm/idle.h>
 #include <asm/uaccess.h>
 #include <asm/i387.h>
+#include <asm/ds.h>
 
 unsigned long idle_halt;
 EXPORT_SYMBOL(idle_halt);
@@ -45,6 +48,8 @@ void free_thread_xstate(struct task_struct *tsk)
                kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
                tsk->thread.xstate = NULL;
        }
+
+       WARN(tsk->thread.ds_ctx, "leaking DS context\n");
 }
 
 void free_thread_info(struct thread_info *ti)
@@ -58,7 +63,7 @@ void arch_task_cache_init(void)
         task_xstate_cachep =
                kmem_cache_create("task_xstate", xstate_size,
                                  __alignof__(union thread_xstate),
-                                 SLAB_PANIC, NULL);
+                                 SLAB_PANIC | SLAB_NOTRACK, NULL);
 }
 
 /*
@@ -83,8 +88,6 @@ void exit_thread(void)
                put_cpu();
                kfree(bp);
        }
-
-       ds_exit_thread(current);
 }
 
 void flush_thread(void)
@@ -613,3 +616,16 @@ static int __init idle_setup(char *str)
 }
 early_param("idle", idle_setup);
 
+unsigned long arch_align_stack(unsigned long sp)
+{
+       if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+               sp -= get_random_int() % 8192;
+       return sp & ~0xf;
+}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+       unsigned long range_end = mm->brk + 0x02000000;
+       return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}
+