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SubjectRe: [PATCH v11 00/69] Introducing the Maple Tree
On Sat, Jul 16, 2022 at 10:20 PM Andrew Morton
<akpm@linux-foundation.org> wrote:
>
> On Sun, 17 Jul 2022 02:46:32 +0000 Liam Howlett <liam.howlett@oracle.com> wrote:
...
> gap = mas.index;
> gap += (info->align_offset - gap) & info->align_mask;
> - VM_BUG_ON(gap + info->length > info->high_limit);
> - VM_BUG_ON(gap + info->length > mas.last);

These VM_BUG_ONs are new, and I hit the second one quickly:

kernel BUG at mm/mmap.c:1631!
RIP: 0010:vm_unmapped_area+0xdb/0x1c0
Call Trace:
<TASK>
arch_get_unmapped_area+0x1ee/0x220
arch_get_unmapped_area_topdown+0x25a/0x290
get_unmapped_area+0x92/0x100
do_mmap+0x13f/0x560
vm_mmap_pgoff+0xcd/0x170

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