From: Ard Biesheuvel <ardb@google.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Ryan Roberts <ryan.roberts@arm.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Kees Cook <keescook@chromium.org>
Subject: [PATCH v5 01/39] arm64: kernel: Disable latent_entropy GCC plugin in early C runtime
Date: Fri, 24 Nov 2023 11:18:41 +0100 [thread overview]
Message-ID: <20231124101840.944737-42-ardb@google.com> (raw)
In-Reply-To: <20231124101840.944737-41-ardb@google.com>
From: Ard Biesheuvel <ardb@kernel.org>
In subsequent patches, mark portions of the early C code will be marked
as __init. Unfortunarely, __init implies __latent_entropy, and this
would result in the early C code being instrumented in an unsafe manner.
Disable the latent entropy plugin for the early C code.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/arm64/kernel/pi/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/pi/Makefile b/arch/arm64/kernel/pi/Makefile
index 4c0ea3cd4ea4..c844a0546d7f 100644
--- a/arch/arm64/kernel/pi/Makefile
+++ b/arch/arm64/kernel/pi/Makefile
@@ -3,6 +3,7 @@
KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \
-Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \
+ $(DISABLE_LATENT_ENTROPY_PLUGIN) \
$(call cc-option,-mbranch-protection=none) \
-I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
-include $(srctree)/include/linux/hidden.h \
--
2.43.0.rc1.413.gea7ed67945-goog
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next prev parent reply other threads:[~2023-11-24 10:20 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-24 10:18 [PATCH v5 00/39] arm64: Reorganize kernel VA space for LPA2 Ard Biesheuvel
2023-11-24 10:18 ` Ard Biesheuvel [this message]
2023-11-24 10:18 ` [PATCH v5 02/39] arm64: mm: Take potential load offset into account when KASLR is off Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 03/39] arm64: mm: get rid of kimage_vaddr global variable Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 04/39] arm64: mm: Move PCI I/O emulation region above the vmemmap region Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 05/39] arm64: mm: Move fixmap region above " Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 06/39] arm64: ptdump: Allow all region boundaries to be defined at boot time Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 07/39] arm64: ptdump: Discover start of vmemmap region at runtime Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 08/39] arm64: vmemmap: Avoid base2 order of struct page size to dimension region Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 09/39] arm64: mm: Reclaim unused vmemmap region for vmalloc use Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 10/39] arm64: kaslr: Adjust randomization range dynamically Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 11/39] arm64: kernel: Manage absolute relocations in code built under pi/ Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 12/39] arm64: kernel: Don't rely on objcopy to make code under pi/ __init Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 13/39] arm64: head: move relocation handling to C code Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 14/39] arm64: idreg-override: Omit non-NULL checks for override pointer Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 15/39] arm64: idreg-override: Prepare for place relative reloc patching Ard Biesheuvel
2023-11-27 12:53 ` Marc Zyngier
2023-11-27 12:58 ` Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 16/39] arm64: idreg-override: Avoid parameq() and parameqn() Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 17/39] arm64: idreg-override: avoid strlen() to check for empty strings Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 18/39] arm64: idreg-override: Avoid sprintf() for simple string concatenation Ard Biesheuvel
2023-11-24 10:18 ` [PATCH v5 19/39] arm64: idreg-override: Avoid kstrtou64() to parse a single hex digit Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 20/39] arm64: idreg-override: Move to early mini C runtime Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 21/39] arm64: kernel: Remove early fdt remap code Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 22/39] arm64: head: Clear BSS and the kernel page tables in one go Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 23/39] arm64: Move feature overrides into the BSS section Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 24/39] arm64: head: Run feature override detection before mapping the kernel Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 25/39] arm64: head: move dynamic shadow call stack patching into early C runtime Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 26/39] arm64: kaslr: Use feature override instead of parsing the cmdline again Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 27/39] arm64/kernel: Move 'nokaslr' parsing out of early idreg code Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 28/39] arm64: idreg-override: Create a pseudo feature for rodata=off Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 29/39] arm64: Add helpers to probe local CPU for PAC and BTI support Ard Biesheuvel
2023-11-24 12:37 ` Marc Zyngier
2023-11-24 13:08 ` Ard Biesheuvel
2023-11-24 13:48 ` Marc Zyngier
2023-11-25 8:59 ` Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 30/39] arm64: head: allocate more pages for the kernel mapping Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 31/39] arm64: head: move memstart_offset_seed handling to C code Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 32/39] arm64: mm: Make kaslr_requires_kpti() a static inline Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 33/39] arm64: head: Move early kernel mapping routines into C code Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 34/39] arm64: mm: Use 48-bit virtual addressing for the permanent ID map Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 35/39] arm64: pgtable: Decouple PGDIR size macros from PGD/PUD/PMD levels Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 36/39] arm64: kernel: Create initial ID map from C code Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 37/39] arm64: mm: avoid fixmap for early swapper_pg_dir updates Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 38/39] arm64: mm: omit redundant remap of kernel image Ard Biesheuvel
2023-11-24 10:19 ` [PATCH v5 39/39] arm64: Revert "mm: provide idmap pointer to cpu_replace_ttbr1()" Ard Biesheuvel
2023-11-24 16:22 ` [PATCH v5 00/39] arm64: Reorganize kernel VA space for LPA2 Ard Biesheuvel
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