diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2025-03-12 09:12:05 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-12 13:04:52 +0100 |
| commit | e471a86a8c523eccdfd1c4745ed7ac7cbdcc1f3f (patch) | |
| tree | 464fed529df4c35d6c8b1b95b277156af502cc91 | |
| parent | 9c54baab4401db249d6938806b812231e0259380 (diff) | |
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@zytor.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250312081204.521411-2-ardb+git@google.com
| -rw-r--r-- | arch/x86/boot/compressed/vmlinux.lds.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S index 48d0b5184557..3b2bc61c9408 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); |