Meanwhile, this change should help:
---8<---
--- /usr/src/kernels/3.10.0-693.21.1.el7.x86_64/arch/x86/Makefile.orig 2018-03-09 10:49:58.902263193 +0100
+++ /usr/src/kernels/3.10.0-693.21.1.el7.x86_64/arch/x86/Makefile 2018-03-09 10:50:51.820305074 +0100
@@ -160,12 +160,12 @@
# Avoid indirect branches in kernel to deal with Spectre
ifdef CONFIG_RETPOLINE
RETPOLINE_CFLAGS += $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
ifneq ($(RETPOLINE_CFLAGS),)
KBUILD_CFLAGS += $(RETPOLINE_CFLAGS) -DRETPOLINE
- else
- $(error CONFIG_RETPOLINE=y, but not supported by the compiler. Toolchain update recommended.)
+# else
+# $(error CONFIG_RETPOLINE=y, but not supported by the compiler. Toolchain update recommended.)
endif
endif
archscripts: scripts_basic
$(Q)$(MAKE) $(build)=arch/x86/tools relocs
--->8---
- Stephan
> On 8. Mar 2018, at 18:59, Pat Riehecky <[log in to unmask]> wrote:
>
> An updated gcc that supports this option is scheduled for publication on Tuesday.
>
> Pat
>
> On 03/08/2018 11:46 AM, Gilles Detillieux wrote:
>> I realize this problem was likely introduced by upsteam updates, but I thought I'd point it out here anyway so you're aware of it. An unintended consequence of this latest kernel update is that it breaks recompilation of third-party kernel modules. The new kernel was built with CONFIG_RETPOLINE enabled, so presumably with a compiler that supports it, but that updated compiler hasn't been released through a corresponding security ERRATA update. (Not yet, anyway.) When I try to build a third-party device driver, I get the following error:
>>
>> make[1]: Entering directory `/usr/src/kernels/3.10.0-693.21.1.el7.x86_64'
>> arch/x86/Makefile:166: *** CONFIG_RETPOLINE=y, but not supported by the compiler. Toolchain update recommended.. Stop.
>> make[1]: Leaving directory `/usr/src/kernels/3.10.0-693.21.1.el7.x86_64'
>> make: *** [default] Error 2
>>
>> Is an update of the compiler toolchain for RHEL7/SL7 through the usual update repos forthcoming? Until then, I don't think I can use this kernel update on systems that rely on that 3rd party driver.
>>
>> Thanks,
>> Gilles
>>
>> On 2018-03-07 16:16, Pat Riehecky wrote:
>>> Synopsis: Important: kernel security and bug fix update
>>> Advisory ID: SLSA-2018:0395-1
>>> Issue Date: 2018-03-06
>>> CVE Numbers: CVE-2017-7518
>>> CVE-2017-12188
>>> --
>>>
>>> Security Fix(es):
>>>
>>> * Kernel: KVM: MMU potential stack buffer overrun during page walks
>>> (CVE-2017-12188, Important)
>>>
>>> * Kernel: KVM: debug exception via syscall emulation (CVE-2017-7518,
>>> Moderate)
>>> --
>>>
>>> SL7
>>> x86_64
>>> kernel-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-debug-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-debug-debuginfo-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-debug-devel-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-debuginfo-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-debuginfo-common-x86_64-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-devel-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-headers-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-tools-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-tools-debuginfo-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-tools-libs-3.10.0-693.21.1.el7.x86_64.rpm
>>> perf-3.10.0-693.21.1.el7.x86_64.rpm
>>> perf-debuginfo-3.10.0-693.21.1.el7.x86_64.rpm
>>> python-perf-3.10.0-693.21.1.el7.x86_64.rpm
>>> python-perf-debuginfo-3.10.0-693.21.1.el7.x86_64.rpm
>>> kernel-tools-libs-devel-3.10.0-693.21.1.el7.x86_64.rpm
>>> noarch
>>> kernel-abi-whitelists-3.10.0-693.21.1.el7.noarch.rpm
>>> kernel-doc-3.10.0-693.21.1.el7.noarch.rpm
>>>
>>> - Scientific Linux Development Team
>>
--
Stephan Wiesand
DESY -DV-
Platanenallee 6
15738 Zeuthen, Germany
|
