From: Dave Hansen <dave.hansen@intel.com>
To: Jarkko Sakkinen <jarkko@kernel.org>,
linux-integrity@vger.kernel.org,
Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>,
linux-sgx@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] arch/x86: Fix size overflows in sgx_encl_create()
Date: Tue, 4 Mar 2025 16:18:03 -0800 [thread overview]
Message-ID: <8255b211-5510-4c09-b13f-c4e3bd0d0aba@intel.com> (raw)
In-Reply-To: <20250305000602.127665-1-jarkko@kernel.org>
On 3/4/25 16:06, Jarkko Sakkinen wrote:
> + /*
> + * This is a micro-architectural requirement. ECREATE would detect this
> + * too without mentionable overhead but this check guarantees also that
> + * the space calculations for EPC and shmem allocations never overflow.
> + */
> + if (!is_power_of_2(secs->size))
> + return -EINVAL;
Isn't it a plain old documented architectural requirement?
next prev parent reply other threads:[~2025-03-05 0:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-05 0:06 [PATCH v2] arch/x86: Fix size overflows in sgx_encl_create() Jarkko Sakkinen
2025-03-05 0:09 ` Jarkko Sakkinen
2025-03-05 0:18 ` Dave Hansen [this message]
2025-03-05 0:19 ` Jarkko Sakkinen
2025-03-05 0:30 ` Dave Hansen
2025-03-05 1:26 ` Jarkko Sakkinen
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