From: Leo Famulari <leo@famulari.name>
To: 45827@debbugs.gnu.org
Subject: bug#45827: [aarch64] GCC 4.9.4 stack deallocation bug
Date: Tue, 12 Jan 2021 17:01:53 -0500 [thread overview]
Message-ID: <X/4cUenGXImGF9Lz@jasmine.lan> (raw)
There was a bug in GCC 4.9.4 that could cause miscompilation, such that
the "compiler was freeing the function's stack frame prior to the end of
the function itself." [0]
The bug was observed to cause corruption of ext4 filesystems on the
aarch64 platform.
The upstream report is here:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
Apparently this was fixed in GCC 5, but never backported to the 4.9
series.
Should we fix it? We use GCC 4.9 to bootstrap the system in (gnu
packages commencement), and a handful of packages depend on it.
[0]
https://lwn.net/SubscriberLink/842122/40442a015222c028/
reply other threads:[~2021-01-12 22:03 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=X/4cUenGXImGF9Lz@jasmine.lan \
--to=leo@famulari.name \
--cc=45827@debbugs.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/guix.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.