This error takes effect when the magic value "zIPL" is located at the
end of a block. For example if s2_cur_blk = 0x7fe18000 and the magic
value "zIPL" is located at 0x7fe18ffc - 0x7fe18fff.
Fixes: ba831b25262a ("s390-ccw: read stage2 boot loader data to find menu")
Reviewed-by: Collin Walling <wall...@linux.ibm.com>
Signed-off-by: Marc Hartmayer <mhart...@linux.ibm.com>
---
pc-bios/s390-ccw/bootmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 97205674e59a..0d29dceaa3cc 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -163,7 +163,7 @@ static bool find_zipl_boot_menu_banner(int *offset)
int i;
/* Menu banner starts with "zIPL" */
- for (i = 0; i < virtio_get_block_size() - 4; i++) {
+ for (i = 0; i < virtio_get_block_size() - 3; i++) {
if (magic_match(s2_cur_blk + i, ZIPL_MAGIC_EBCDIC)) {
*offset = i;
return true;
--
2.25.4
