| From c453db6cd96418c79702eaf38259002755ab23ff Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Date: Tue, 29 Jun 2021 12:40:24 +0200 |
| Subject: nds32: fix up stack guard gap |
| |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| commit c453db6cd96418c79702eaf38259002755ab23ff upstream. |
| |
| Commit 1be7107fbe18 ("mm: larger stack guard gap, between vmas") fixed |
| up all architectures to deal with the stack guard gap. But when nds32 |
| was added to the tree, it forgot to do the same thing. |
| |
| Resolve this by properly fixing up the nsd32's version of |
| arch_get_unmapped_area() |
| |
| Cc: Nick Hu <nickhu@andestech.com> |
| Cc: Greentime Hu <green.hu@gmail.com> |
| Cc: Vincent Chen <deanbo422@gmail.com> |
| Cc: Michal Hocko <mhocko@suse.com> |
| Cc: Hugh Dickins <hughd@google.com> |
| Cc: Qiang Liu <cyruscyliu@gmail.com> |
| Cc: stable <stable@vger.kernel.org> |
| Reported-by: iLifetruth <yixiaonn@gmail.com> |
| Acked-by: Hugh Dickins <hughd@google.com> |
| Link: https://lore.kernel.org/r/20210629104024.2293615-1-gregkh@linuxfoundation.org |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| arch/nds32/mm/mmap.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/nds32/mm/mmap.c |
| +++ b/arch/nds32/mm/mmap.c |
| @@ -59,7 +59,7 @@ arch_get_unmapped_area(struct file *filp |
| |
| vma = find_vma(mm, addr); |
| if (TASK_SIZE - len >= addr && |
| - (!vma || addr + len <= vma->vm_start)) |
| + (!vma || addr + len <= vm_start_gap(vma))) |
| return addr; |
| } |
| |