[PATCH 1/3] uprobes: valid_vma() should reject VM_HUGETLB

[Oleg Nesterov <oleg@redhat.com>]

__replace_page() obviously can't work with the hugetlbfs mappings,
uprobe_register() will likely crash the kernel. Change valid_vma()
to check VM_HUGETLB as well.

As for PageTransHuge() no need to worry, vma->vm_file != NULL.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
 kernel/events/uprobes.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 6e3b181..48d53af 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -105,7 +105,8 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
 	if (!is_register)
 		return true;
 
-	if ((vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)) == (VM_READ|VM_EXEC))
+	if ((vma->vm_flags & (VM_HUGETLB|VM_READ|VM_WRITE|VM_EXEC|VM_SHARED))
+				== (VM_READ|VM_EXEC))
 		return true;
 
 	return false;
-- 
1.5.5.1