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-rw-r--r--arch/powerpc/kernel/vdso.c4
-rw-r--r--fs/exec.c6
-rw-r--r--include/linux/sched.h5
3 files changed, 11 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index f0c47da..04f7df3 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -182,8 +182,8 @@ static struct page * vdso_vma_nopage(struct vm_area_struct * vma,
unsigned long offset = address - vma->vm_start;
struct page *pg;
#ifdef CONFIG_PPC64
- void *vbase = test_thread_flag(TIF_32BIT) ?
- vdso32_kbase : vdso64_kbase;
+ void *vbase = (vma->vm_mm->task_size > TASK_SIZE_USER32) ?
+ vdso64_kbase : vdso32_kbase;
#else
void *vbase = vdso32_kbase;
#endif
diff --git a/fs/exec.c b/fs/exec.c
index 0e1c950..0b515ac 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -885,6 +885,12 @@ int flush_old_exec(struct linux_binprm * bprm)
current->flags &= ~PF_RANDOMIZE;
flush_thread();
+ /* Set the new mm task size. We have to do that late because it may
+ * depend on TIF_32BIT which is only updated in flush_thread() on
+ * some architectures like powerpc
+ */
+ current->mm->task_size = TASK_SIZE;
+
if (bprm->e_uid != current->euid || bprm->e_gid != current->egid ||
file_permission(bprm->file, MAY_READ) ||
(bprm->interp_flags & BINPRM_FLAGS_ENFORCE_NONDUMP)) {
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b6f51e3..ff2e09c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -298,8 +298,9 @@ struct mm_struct {
unsigned long addr, unsigned long len,
unsigned long pgoff, unsigned long flags);
void (*unmap_area) (struct mm_struct *mm, unsigned long addr);
- unsigned long mmap_base; /* base of mmap area */
- unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
+ unsigned long mmap_base; /* base of mmap area */
+ unsigned long task_size; /* size of task vm space */
+ unsigned long cached_hole_size; /* if non-zero, the largest hole below free_area_cache */
unsigned long free_area_cache; /* first hole of size cached_hole_size or larger */
pgd_t * pgd;
atomic_t mm_users; /* How many users with user space? */