On Wed, 17 Nov 2021 23:01:50 +0100,
Kees Cook wrote:

On Wed, Nov 17, 2021 at 08:32:44PM +0100, Takashi Iwai wrote:

quoted

When CONFIG_FORTIFY_SOURCE is set, memcpy() checks the potential
buffer overflow and panics.  The code in sofcpga bootstrapping
contains the memcpy() calls are mistakenly translated as the shorter
size, hence it triggers a panic as if it were overflowing.

This patch adds the __NO_FORTIFY define for avoiding the
false-positive crash.

Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1192473
Signed-off-by: Takashi Iwai <redacted>
---

I took an easier path for now, as the attempt with a foced cast
failed.  If there is a better way to handle, let me know, I'd happily
resubmit.  Thanks!

The way these have been fixed in the past is to declare these as char
arrays (see include/asm-generic/sections.h). I'd prefer something like
this (totally untested):

(snip)

That looks better, indeed.  I'll rebuild the kernel with it and ask
the bug reporter for testing it.


Thanks!

Takashi

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