Bug#920866: linux-source-4.19: arm64 kernel should have workaround for ARM Cortex-A53 erratum 843419 enabled
Package: linux-source-4.19
Severity: important
Dear Maintainer,
Currently, the linux-image-arm64 kernel is built with
CONFIG_ARM64_ERRATUM_843419 explicitly disabled, while it defaults to on
in the Kconfig definition.
The GCC toolchain enables a link time workaround for this erratum, and
so all fully linked binaries such as userland executables and shared
libraries, as well as the core kernel (vmlinux), are built with
mitigations that prevent this erratum from being triggered. However,
kernel modules are not fully linked binaries (they are partially linked
object files), and so without this CONFIG option enabled, the resulting
modules may trigger the erratum and crash or corrupt data (or both).
Note that the Cortex-A53 used in the Raspberry Pi 3 is affected by this
erratum.
So please enable CONFIG_ARM64_ERRATUM_843419.
-- System Information:
Debian Release: 9.7
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: arm64 (aarch64)
Kernel: Linux 5.0.0-rc4+ (SMP w/24 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages linux-source-4.19 depends on:
ii binutils 2.28-5
ii xz-utils 5.2.2-1.2+b1
Versions of packages linux-source-4.19 recommends:
ii bc 1.06.95-9+b3
ii gcc 4:6.3.0-4
ii libc6-dev [libc-dev] 2.24-11+deb9u3
pn linux-config-4.19 <none>
ii make 4.1-9.1
Versions of packages linux-source-4.19 suggests:
ii libncurses5-dev [ncurses-dev] 6.0+20161126-1+deb9u2
pn libqt4-dev <none>
ii pkg-config 0.29-4+b1
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