This is a note to let you know that I've just added the patch titled
nds32: fix up stack guard gap
to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
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
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.or... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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; }