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charset="utf-8" From: "Liam R. Howlett" mmap_region is already passed sanitized addr and len, so change the call to do_vmi_munmap() to do_vmi_align_munmap() and inline the other checks. The inlining of the function and checks is an intermediate step in the series so future patches are easier to follow. Signed-off-by: Liam R. Howlett Reviewed-by: Lorenzo Stoakes --- mm/mmap.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index dce1cc74ecdb..ec72f05b05f2 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1388,12 +1388,15 @@ unsigned long mmap_region(struct file *file, unsign= ed long addr, return -ENOMEM; } =20 - /* Unmap any existing mapping in the area */ - error =3D do_vmi_munmap(&vmi, mm, addr, len, uf, false); - if (error =3D=3D -EPERM) - return error; - else if (error) - return -ENOMEM; + /* Find the first overlapping VMA */ + vma =3D vma_find(&vmi, end); + if (vma) { + /* Unmap any existing mapping in the area */ + error =3D do_vmi_align_munmap(&vmi, vma, mm, addr, end, uf, false); + if (error) + return error; + vma =3D NULL; + } =20 /* * Private writable mapping: check memory availability --=20 2.43.0