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 Rrn1Yiwb 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Aug 27, 2024 at 02:55:45PM GMT, kernel test robot wrote: > > > Hello, > > kernel test robot noticed "WARNING:at_mm/vma.c:#vma_merge_new_range" on: > > commit: a0f2295a607c0e8a64893593432562444a58a70b ("mm: avoid using vma_merge() for new VMAs") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > in testcase: trinity [snip] > [ 28.048325][ T765] ------------[ cut here ]------------ > [ 28.048597][ T765] WARNING: CPU: 0 PID: 765 at mm/vma.c:524 vma_merge_new_range (mm/vma.c:524 (discriminator 1)) Hi, thanks for the report. For the record this is the following CONFIG_DEBUG_VM check: /* vmi must point at or before the gap. */ VM_WARN_ON(vma_iter_addr(vmg->vmi) > end); Which I was able to determine fired due to copy_vma() unnecessarily advancing the iterator if no previous VMA exists. I have provided a fix-patch at [0] which should land in -next soon and resolve this issue. [0]:https://lore.kernel.org/linux-mm/c0ef6b6a-1c9b-4da2-a180-c8e1c73b1c28@lucifer.local/ [snip]