On Tue, 29 Jun 2021, Greg Kroah-Hartman wrote:
Commit 1be7107fbe18 ("mm: larger stack guard gap, between vmas") fixed up almost all architectures to deal with the stack guard gap, but forgit nds32.
Resolve this by properly fixing up the nsd32's version of arch_get_unmapped_area()
Reported-by: iLifetruth yixiaonn@gmail.com 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 Fixes: 1be7107fbe18 ("mm: larger stack guard gap, between vmas") Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Acked-by: Hugh Dickins hughd@google.com
but it's a bit unfair to say that commit forgot nds32: nds32 came into the tree nearly a year later.
arch/nds32/mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/nds32/mm/mmap.c b/arch/nds32/mm/mmap.c index c206b31ce07a..1bdf5e7d1b43 100644 --- a/arch/nds32/mm/mmap.c +++ b/arch/nds32/mm/mmap.c @@ -59,7 +59,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, 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;2.32.0