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 /fs/ncpfs/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 'fs/ncpfs/mmap.c')
| -rw-r--r-- | fs/ncpfs/mmap.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/ncpfs/mmap.c b/fs/ncpfs/mmap.c index 70a69115500f..f87de9718242 100644 --- a/fs/ncpfs/mmap.c +++ b/fs/ncpfs/mmap.c @@ -47,9 +47,6 @@ static struct page* ncp_file_mmap_nopage(struct vm_area_struct *area, pos = address - area->vm_start + (area->vm_pgoff << PAGE_SHIFT); count = PAGE_SIZE; - if (address + PAGE_SIZE > area->vm_end) { - count = area->vm_end - address; - } /* what we can read in one go */ bufsize = NCP_SERVER(inode)->buffer_size; |