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Date: Sat, 16 Jul 2022 23:57:18 -0600 From: Yu Zhao <yuzhao@...gle.com> To: Andrew Morton <akpm@...ux-foundation.org>, Liam Howlett <liam.howlett@...cle.com> Cc: "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>, "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Hugh Dickins <hughd@...gle.com> Subject: Re: [PATCH v11 00/69] Introducing the Maple Tree On Sat, Jul 16, 2022 at 10:20 PM Andrew Morton <akpm@...ux-foundation.org> wrote: > > On Sun, 17 Jul 2022 02:46:32 +0000 Liam Howlett <liam.howlett@...cle.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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