Messages in this thread | | | Date | Tue, 19 Jan 2021 08:59:04 -0400 | From | Jason Gunthorpe <> | Subject | Re: [PATCH v6 1/4] sgl_alloc_order: remove 4 GiB limit, sgl_free() warning |
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On Mon, Jan 18, 2021 at 08:27:09PM -0500, Douglas Gilbert wrote:
> To protect against the "unsigned long long" length being too big why > not pick a large power of two and if someone can justify a larger > value, they can send a patch. > > if (length > 64ULL * 1024 * 1024 * 1024) > return NULL;
That is not how we protect against arithemetic overflows in the kernel
Jason
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