linux-kernel - problems with memory allocation and the alignment check

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Message-ID: <80753cbc54ef69b4fc136f791666197fc8b1f8bb.camel@cyberfiber.eu>
Date:   Mon, 22 Feb 2021 10:08:50 +0100
From:   "Michael J. Baars" <mjbaars1977.gcc@...erfiber.eu>
To:     gcc@....gnu.org, linux-kernel@...r.kernel.org
Subject: problems with memory allocation and the alignment check

Hi,

I just wrote this little program to demonstrate a possible flaw in both malloc and calloc.

If I allocate a the simplest memory region from main(), one out of three optimization flags fail.
If I allocate the same region from a function, three out of three optimization flags fail.

Does someone know if this really is a flaw, and if so, is it a gcc or a kernel flaw?

Regards,
Mischa.

View attachment "main.c" of type "text/x-csrc" (862 bytes)

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