From: Jason Gunthorpe <jgg@ziepe.ca>
To: Douglas Gilbert <dgilbert@interlog.com>
Cc: Bodo Stroesser <bostroesser@gmail.com>,
linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
target-devel@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-kernel@vger.kernel.org, martin.petersen@oracle.com,
jejb@linux.vnet.ibm.com, ddiss@suse.de, bvanassche@acm.org
Subject: Re: [PATCH v6 1/4] sgl_alloc_order: remove 4 GiB limit, sgl_free() warning
Date: Tue, 19 Jan 2021 08:59:04 -0400 [thread overview]
Message-ID: <20210119125904.GR4605@ziepe.ca> (raw)
In-Reply-To: <770a562e-52b9-ba93-59d3-1026340bf4f3@interlog.com>
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
next prev parent reply other threads:[~2021-01-19 13:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 16:30 [PATCH v6 0/4] scatterlist: add new capabilities Douglas Gilbert
2021-01-18 16:30 ` [PATCH v6 1/4] sgl_alloc_order: remove 4 GiB limit, sgl_free() warning Douglas Gilbert
2021-01-18 18:28 ` Jason Gunthorpe
2021-01-18 20:08 ` Douglas Gilbert
2021-01-18 20:24 ` Jason Gunthorpe
2021-01-18 21:22 ` Bodo Stroesser
2021-01-18 23:48 ` Jason Gunthorpe
2021-01-19 1:27 ` Douglas Gilbert
2021-01-19 12:59 ` Jason Gunthorpe [this message]
2021-01-19 17:24 ` Bodo Stroesser
2021-01-19 18:03 ` Jason Gunthorpe
2021-01-19 18:08 ` Bodo Stroesser
2021-01-19 18:17 ` Jason Gunthorpe
2021-01-19 18:39 ` Bodo Stroesser
2021-01-18 20:46 ` Bodo Stroesser
2021-01-18 16:30 ` [PATCH v6 2/4] scatterlist: add sgl_copy_sgl() function Douglas Gilbert
2021-01-18 16:30 ` [PATCH v6 3/4] scatterlist: add sgl_compare_sgl() function Douglas Gilbert
2021-01-18 23:27 ` David Disseldorp
2021-01-19 1:04 ` Douglas Gilbert
2021-01-19 11:50 ` David Disseldorp
2021-01-18 16:30 ` [PATCH v6 4/4] scatterlist: add sgl_memset() Douglas Gilbert
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