diff options
| author | Nick Piggin <npiggin@suse.de> | 2008-02-02 03:08:53 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-06 11:43:46 -0800 |
| commit | 83af8eda68a3f0c227d0eb05348e58ae27a62e7e (patch) | |
| tree | 33ce1f20faa9337c5c08f39dd840c34dc311e041 /mm/mmap.c | |
| parent | 0abe2d30fd090eba86541654080fee7686cf72fc (diff) | |
vm audit: add VM_DONTEXPAND to mmap for drivers that need it (CVE-2008-0007)
Drivers that register a ->fault handler, but do not range-check the
offset argument, must set VM_DONTEXPAND in the vm_flags in order to
prevent an expanding mremap from overflowing the resource.
I've audited the tree and attempted to fix these problems (usually by
adding VM_DONTEXPAND where it is not obvious).
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 906ed402f7ca..33fb6718d76d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2157,7 +2157,7 @@ int install_special_mapping(struct mm_struct *mm, vma->vm_start = addr; vma->vm_end = addr + len; - vma->vm_flags = vm_flags | mm->def_flags; + vma->vm_flags = vm_flags | mm->def_flags | VM_DONTEXPAND; vma->vm_page_prot = protection_map[vma->vm_flags & 7]; vma->vm_ops = &special_mapping_vmops; |