Re: Aarch64 EXT4FS inode checksum failures - seems to be weak memory ordering issues

Russell King - ARM Linux admin
2021-01-07T13:38:48Z

On Thu, Jan 07, 2021 at 02:16:25PM +0100, Arnd Bergmann wrote:
> On Thu, Jan 7, 2021 at 1:47 PM Russell King - ARM Linux admin
> <linux@armlinux.org.uk> wrote:
>
> > Arnd has found via bisecting gcc:
> >
> > 7e8c2bd54af ("[AArch64] fix unsafe access to deallocated stack")
> >
> > which seems to be https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
> >
> > That seems to suggest that gcc-5.0.0 is also affected.
> >
> > Looking at the changelog in Debian's gcc-8.3 packages, this doesn't
> > feature, so it's not easy just to look at the changelogs to work out
> > which versions are affected.
>
> I checked the history to confirm that all gcc-5 releases (5.0.x is pre-release)
> and later have the fix.
>
> The gcc bugzilla mentions backports into gcc-linaro, but I do not see
> them in my git history.

So, do we raise the minimum gcc version for the kernel as a whole to 5.1
or just for aarch64?

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