Let's tell syzbot about the fix #syz fix: mm/gup.c: Fix return value for __gup_longterm_locked() On Mon, Aug 22, 2022 at 2:10 AM 'John Hubbard' via syzkaller-bugs <syzkaller-bugs@xxxxxxxxxxxxxxxx> wrote: > > On 8/21/22 16:31, Andrew Morton wrote: > > On Sun, 21 Aug 2022 16:18:48 -0700 John Hubbard <jhubbard@xxxxxxxxxx> wrote: > > > >>> vmas[] array. We haven't messed with gup.c much this time around - > >>> just one patch from Alistair ("mm/gup.c: simplify and fix > >>> check_and_migrate_movable_pages() return codes"). It does touch this > >>> area, but I can't immediately see how it could newly cause this. > >>> > >> > >> Neither can I, even after looking at both of these recent commits to > >> gup.c in this branch: > >> > >> commit 4d1225cd5560 ("mm/gup.c: simplify and fix > >> check_and_migrate_movable_pages() return codes") > >> > >> commit 0e5d6dac6b65 ("mm/gup: fix FOLL_FORCE COW security issue and > >> remove FOLL_COW") > >> > >> As you say, a bisection would really help here. > > > > Might > > https://lkml.kernel.org/r/20220821183547.950370-1-syoshida@xxxxxxxxxx > > save us? > > > > > > aha yes, that looks right. > > > thanks, > -- > John Hubbard > NVIDIA > > -- > You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@xxxxxxxxxxxxxxxx. > To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/761793f4-cd16-fcc1-8777-f7e032604e1e%40nvidia.com.