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Howlett > Date: Tue Jun 21 20:46:53 2022 +0000 >=20 > mm: start tracking VMAs with maple tree >=20 > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=3D10b5b25208= 0000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=3D12b5b25208= 0000 > console output: https://syzkaller.appspot.com/x/log.txt?x=3D14b5b25208000= 0 >=20 > IMPORTANT: if you fix the issue, please add the following tag to the comm= it: > Reported-by: syzbot+28eb226ee1d37f08087a@syzkaller.appspotmail.com > Fixes: 2ee236fe53a8 ("mm: start tracking VMAs with maple tree") >=20 Thank you. Yes, it looks like failing the allocation after vma_adjust_trans_huge() is not working out here. What happens is a split fails to vm_adjust, so we enter the __split_vm() error code path which calls vm_ops->close(). The account for the hughtlb is actually done in the close() operation. What I can do is to avoid accounting by setting vm_start =3D vm_end, and vm_pgoff =3D 0. This way, the accounting will charge 0 as apposed to removing the vma that was never added.=