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

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
[off-list ref] wrote:

quoted

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?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!