From: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
[ Upstream commit aa127a069ef312aca02b730d5137e1778d0c3ba7 ]
This patch enhances the kernel image adding a trailer as required for
secure boot by future firmware versions.
Cc: <stable@xxxxxxxxxxxxxxx> # 5.2+
Signed-off-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>
Reviewed-by: Sven Schnelle <svens@xxxxxxxxxxxxx>
Signed-off-by: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/s390/boot/compressed/vmlinux.lds.S | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/s390/boot/compressed/vmlinux.lds.S b/arch/s390/boot/compressed/vmlinux.lds.S
index 9427e2cd0c15..11bf3919610e 100644
--- a/arch/s390/boot/compressed/vmlinux.lds.S
+++ b/arch/s390/boot/compressed/vmlinux.lds.S
@@ -91,8 +91,17 @@ SECTIONS
_compressed_start = .;
*(.vmlinux.bin.compressed)
_compressed_end = .;
- FILL(0xff);
- . = ALIGN(4096);
+ }
+
+#define SB_TRAILER_SIZE 32
+ /* Trailer needed for Secure Boot */
+ . += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
+ . = ALIGN(4096) - SB_TRAILER_SIZE;
+ .sb.trailer : {
+ QUAD(0)
+ QUAD(0)
+ QUAD(0)
+ QUAD(0x000000207a49504c)
}
_end = .;
--
2.35.1
