From: Liam Howlett <liam.howlett@xxxxxxxxxx> Subject: misc/sgi-gru/grufault: use vma_lookup() in gru_find_vma() Use vma_lookup() to find the VMA at a specific address. As vma_lookup() will return NULL if the address is not within any VMA, the start address no longer needs to be validated. Link: https://lkml.kernel.org/r/20210521174745.2219620-16-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Reviewed-by: Laurent Dufour <ldufour@xxxxxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Davidlohr Bueso <dbueso@xxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/misc/sgi-gru/grufault.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/misc/sgi-gru/grufault.c~misc-sgi-gru-grufault-use-vma_lookup-in-gru_find_vma +++ a/drivers/misc/sgi-gru/grufault.c @@ -49,8 +49,8 @@ struct vm_area_struct *gru_find_vma(unsi { struct vm_area_struct *vma; - vma = find_vma(current->mm, vaddr); - if (vma && vma->vm_start <= vaddr && vma->vm_ops == &gru_vm_ops) + vma = vma_lookup(current->mm, vaddr); + if (vma && vma->vm_ops == &gru_vm_ops) return vma; return NULL; } _
