[patch 15/20] i386: allow debuggers to access the vsyscall page with compat vDSO

Greg KH
2007-08-21T06:58:01Z

[-- Attachment #1: i386-allow-debuggers-to-access-the-vsyscall-page-with-compat-vdso.patch --]
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-stable review patch. If anyone has any objections, please let us know.

------------------
From: Jan Beulich <jbeulich@novell.com>

From: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
arch/i386/kernel/sysenter.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/arch/i386/kernel/sysenter.c
+++ b/arch/i386/kernel/sysenter.c
@@ -336,7 +336,9 @@ struct vm_area_struct *get_gate_vma(stru

int in_gate_area(struct task_struct *task, unsigned long addr)
{
- return 0;
+ const struct vm_area_struct *vma = get_gate_vma(task);
+
+ return vma && addr >= vma->vm_start && addr < vma->vm_end;
}

int in_gate_area_no_task(unsigned long addr)

--