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From: Ard Biesheuvel <ardb+git@google.com>
To: stable@vger.kernel.org
Subject: [PATCH for-stable-6.1 04/23] x86/efi: Drop alignment flags from PE section headers
Date: Fri, 19 Apr 2024 10:11:10 +0200	[thread overview]
Message-ID: <20240419081105.3817596-29-ardb+git@google.com> (raw)
In-Reply-To: <20240419081105.3817596-25-ardb+git@google.com>

From: Ard Biesheuvel <ardb@kernel.org>

[ Commit bfab35f552ab3dd6d017165bf9de1d1d20f198cc upstream ]

The section header flags for alignment are documented in the PE/COFF
spec as being applicable to PE object files only, not to PE executables
such as the Linux bzImage, so let's drop them from the PE header.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230912090051.4014114-20-ardb@google.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/boot/header.S | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index d31982509654..38b611eb1a3c 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -208,8 +208,7 @@ section_table:
 	.word	0				# NumberOfLineNumbers
 	.long	IMAGE_SCN_CNT_CODE		| \
 		IMAGE_SCN_MEM_READ		| \
-		IMAGE_SCN_MEM_EXECUTE		| \
-		IMAGE_SCN_ALIGN_16BYTES		# Characteristics
+		IMAGE_SCN_MEM_EXECUTE		# Characteristics
 
 	#
 	# The EFI application loader requires a relocation section
@@ -229,8 +228,7 @@ section_table:
 	.word	0				# NumberOfLineNumbers
 	.long	IMAGE_SCN_CNT_INITIALIZED_DATA	| \
 		IMAGE_SCN_MEM_READ		| \
-		IMAGE_SCN_MEM_DISCARDABLE	| \
-		IMAGE_SCN_ALIGN_1BYTES		# Characteristics
+		IMAGE_SCN_MEM_DISCARDABLE	# Characteristics
 
 #ifdef CONFIG_EFI_MIXED
 	#
@@ -248,8 +246,7 @@ section_table:
 	.word	0				# NumberOfLineNumbers
 	.long	IMAGE_SCN_CNT_INITIALIZED_DATA	| \
 		IMAGE_SCN_MEM_READ		| \
-		IMAGE_SCN_MEM_DISCARDABLE	| \
-		IMAGE_SCN_ALIGN_1BYTES		# Characteristics
+		IMAGE_SCN_MEM_DISCARDABLE	# Characteristics
 #endif
 
 	#
@@ -270,8 +267,7 @@ section_table:
 	.word	0				# NumberOfLineNumbers
 	.long	IMAGE_SCN_CNT_CODE		| \
 		IMAGE_SCN_MEM_READ		| \
-		IMAGE_SCN_MEM_EXECUTE		| \
-		IMAGE_SCN_ALIGN_16BYTES		# Characteristics
+		IMAGE_SCN_MEM_EXECUTE		# Characteristics
 
 	.set	section_count, (. - section_table) / 40
 #endif /* CONFIG_EFI_STUB */
-- 
2.44.0.769.g3c40516874-goog


  parent reply	other threads:[~2024-04-19  8:11 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-04-19  8:11 [PATCH for-stable-6.1 00/23] x86/efistub backports Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 01/23] x86/efi: Drop EFI stub .bss from .data section Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 02/23] x86/efi: Disregard setup header of loaded image Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 03/23] x86/efistub: Reinstate soft limit for initrd loading Ard Biesheuvel
2024-04-19  8:11 ` Ard Biesheuvel [this message]
2024-04-19  8:11 ` [PATCH for-stable-6.1 05/23] x86/boot: Remove the 'bugger off' message Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 06/23] x86/boot: Omit compression buffer from PE/COFF image memory footprint Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 07/23] x86/boot: Drop redundant code setting the root device Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 08/23] x86/boot: Drop references to startup_64 Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 09/23] x86/boot: Grab kernel_info offset from zoffset header directly Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 10/23] x86/boot: Set EFI handover offset directly in header asm Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 11/23] x86/boot: Define setup size in linker script Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 12/23] x86/boot: Derive file size from _edata symbol Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 13/23] x86/boot: Construct PE/COFF .text section from assembler Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 14/23] x86/boot: Drop PE/COFF .reloc section Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 15/23] x86/boot: Split off PE/COFF .data section Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 16/23] x86/boot: Increase section and file alignment to 4k/512 Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 17/23] x86/efistub: Use 1:1 file:memory mapping for PE/COFF .compat section Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 18/23] x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 19/23] x86/head/64: Add missing __head annotation to startup_64_load_idt() Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 20/23] x86/head/64: Move the __head definition to <asm/init.h> Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 21/23] x86/sme: Move early SME kernel encryption handling into .head.text Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 22/23] x86/sev: Move early startup code into .head.text section Ard Biesheuvel
2024-04-19  8:11 ` [PATCH for-stable-6.1 23/23] x86/efistub: Remap kernel text read-only before dropping NX attribute Ard Biesheuvel
2024-04-19 10:47 ` [PATCH for-stable-6.1 00/23] x86/efistub backports Greg KH

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