The following commit has been merged into the x86/build branch of tip: Commit-ID: e471a86a8c523eccdfd1c4745ed7ac7cbdcc1f3f Gitweb: https://git.kernel.org/tip/e471a86a8c523eccdfd1c4745ed7ac7cbdcc1f3f Author: Ard Biesheuvel <ardb@xxxxxxxxxx> AuthorDate: Wed, 12 Mar 2025 09:12:05 +01:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Wed, 12 Mar 2025 13:04:52 +01:00 x86/boot: Add back some padding for the CRC-32 checksum Even though no uses of the bzImage CRC-32 checksum are known, ensure that the last 4 bytes of the image are unused zero bytes, so that the checksum can be generated post-build if needed. [ mingo: Added the 'obsolete' qualifier to the comment. ] Suggested-by: "H. Peter Anvin" <hpa@xxxxxxxxx> Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Ian Campbell <ijc@xxxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20250312081204.521411-2-ardb+git@xxxxxxxxxx --- arch/x86/boot/compressed/vmlinux.lds.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 48d0b51..3b2bc61 100644 --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -48,7 +48,8 @@ SECTIONS *(.data) *(.data.*) - . = ALIGN(0x200); + /* Add 4 bytes of extra space for the obsolete CRC-32 checksum */ + . = ALIGN(. + 4, 0x200); _edata = . ; } . = ALIGN(L1_CACHE_BYTES);
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