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Will you be performing a bisection? No need, I see what I did wrong. >=20 > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=3D12978216480= 000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=3Dceb6f70a080= e19c3 > > dashboard link: https://syzkaller.appspot.com/bug?extid=3D502859d610c66= 1e56545 > > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binu= tils for Debian) 2.35.2 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D117fcc024= 80000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=3D1396d7d6480= 000 > >=20 > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/22f2428ec2eb/d= isk-543b9b2f.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/6003c7af47cc/vmli= nux-543b9b2f.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/ac9a6ad60347= /bzImage-543b9b2f.xz > >=20 > > IMPORTANT: if you fix the issue, please add the following tag to the co= mmit: > > Reported-by: syzbot+502859d610c661e56545@syzkaller.appspotmail.com > >=20 > > ------------[ cut here ]------------ > > WARNING: CPU: 0 PID: 5072 at mm/mempolicy.c:797 mbind_range+0x5d2/0x760= mm/mempolicy.c:797 >=20 > static int mbind_range(struct mm_struct *mm, unsigned long start, > unsigned long end, struct mempolicy *new_pol) > { > VMA_ITERATOR(vmi, mm, start); > struct vm_area_struct *prev; > struct vm_area_struct *vma; > int err =3D 0; > pgoff_t pgoff; >=20 > prev =3D vma_prev(&vmi); > vma =3D vma_find(&vmi, end); > if (WARN_ON(!vma)) > return 0; >=20 > Liam recently altered this code with "mempolicy: convert to vma iterator"= ? Yes, thanks. This helped a lot in seeing what I did here. ... Thanks, Liam=