On Sun, 15 Aug 2021 at 20:17, Mike Kravetz <mike.kravetz@xxxxxxxxxx> wrote: > > On 8/14/21 4:24 PM, Matthew Wilcox wrote: > > On Sat, Aug 14, 2021 at 03:06:52PM -0700, Andrew Morton wrote: > >> On Sat, 14 Aug 2021 04:07:23 -0700 syzbot <syzbot+57876cfc2dca0c6b2e6a@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > >>> HEAD commit: 92d00774360d Add linux-next specific files for 20210810 > >>> RIP: 0010:__list_add include/linux/list.h:71 [inline] > >>> RIP: 0010:list_add include/linux/list.h:86 [inline] > >>> RIP: 0010:alloc_huge_page+0xdcb/0x11b0 mm/hugetlb.c:2821 > >> > >> That appears to be > >> > >> list_add(&page->lru, &h->hugepage_activelist); > >> > >> I'm suspecting Mike's surplus page changes? > > > > Is this not the same as > > https://lore.kernel.org/linux-mm/846c4502-3332-0d25-87f5-cb3b71afc38f@xxxxxxxxxxx/ > > which is already patched in your tree? > > Yes, I believe it is the same, and already fixed. RCX: fffffffffffffffc > makes me 99.9% confident. Let's tell syzbot about the fix: #syz fix: mm/hugetlb: Initialize page to NULL in alloc_buddy_huge_page_with_mpol()
