diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0043-nospec-Include-asm-barrier.h-dependency.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0043-nospec-Include-asm-barrier.h-dependency.patch | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0043-nospec-Include-asm-barrier.h-dependency.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0043-nospec-Include-asm-barrier.h-dependency.patch new file mode 100644 index 00000000..33ce3dd7 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0043-nospec-Include-asm-barrier.h-dependency.patch @@ -0,0 +1,51 @@ +From 3997af07cbe06033b93bffe163982e30f86d4ac7 Mon Sep 17 00:00:00 2001 +From: Dan Williams <dan.j.williams@intel.com> +Date: Fri, 16 Feb 2018 13:20:54 -0800 +Subject: [PATCH 43/93] nospec: Include <asm/barrier.h> dependency + +commit eb6174f6d1be16b19cfa43dac296bfed003ce1a6 upstream. + +The nospec.h header expects the per-architecture header file +<asm/barrier.h> to optionally define array_index_mask_nospec(). Include +that dependency to prevent inadvertent fallback to the default +array_index_mask_nospec() implementation. + +The default implementation may not provide a full mitigation +on architectures that perform data value speculation. + +Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> +Signed-off-by: Dan Williams <dan.j.williams@intel.com> +Cc: Andy Lutomirski <luto@kernel.org> +Cc: Arjan van de Ven <arjan@linux.intel.com> +Cc: Borislav Petkov <bp@alien8.de> +Cc: Dave Hansen <dave.hansen@linux.intel.com> +Cc: David Woodhouse <dwmw2@infradead.org> +Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +Cc: Josh Poimboeuf <jpoimboe@redhat.com> +Cc: Linus Torvalds <torvalds@linux-foundation.org> +Cc: Peter Zijlstra <peterz@infradead.org> +Cc: Thomas Gleixner <tglx@linutronix.de> +Cc: Will Deacon <will.deacon@arm.com> +Cc: linux-arch@vger.kernel.org +Link: http://lkml.kernel.org/r/151881605404.17395.1341935530792574707.stgit@dwillia2-desk3.amr.corp.intel.com +Signed-off-by: Ingo Molnar <mingo@kernel.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + include/linux/nospec.h | 1 + + 1 file changed, 1 insertion(+) + +diff --git a/include/linux/nospec.h b/include/linux/nospec.h +index 172a19d..e791ebc 100644 +--- a/include/linux/nospec.h ++++ b/include/linux/nospec.h +@@ -5,6 +5,7 @@ + + #ifndef _LINUX_NOSPEC_H + #define _LINUX_NOSPEC_H ++#include <asm/barrier.h> + + /** + * array_index_mask_nospec() - generate a ~0 mask when index < size, 0 otherwise +-- +2.7.4 + |