The calculation of the size of the table was incorrect (copy/pasta from
grub_acpi_rsdt_find_table() I assume...). The entries are 64-bit long.
This causes us to access beyond the end of the table which is causing
crashes during boot on some systems. Typically this is causing a crash
on VMWare when using UEFI and enabling serial autodetection, as
grub_acpi_find_table (GRUB_ACPI_SPCR_SIGNATURE);
Will goes past the end of the table (the SPCR table doesn't exits)
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
grub-core/kern/acpi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/grub-core/kern/acpi.c b/grub-core/kern/acpi.c
index 48ded4e2e..8ff0835d5 100644
--- a/grub-core/kern/acpi.c
+++ b/grub-core/kern/acpi.c
@@ -75,7 +75,7 @@ grub_acpi_xsdt_find_table (struct
grub_acpi_table_header *xsdt, const char *sig)
return 0;
ptr = (grub_unaligned_uint64_t *) (xsdt + 1);
- s = (xsdt->length - sizeof (*xsdt)) / sizeof (grub_uint32_t);
+ s = (xsdt->length - sizeof (*xsdt)) / sizeof (grub_uint64_t);
for (; s; s--, ptr++)
{
struct grub_acpi_table_header *tbl;
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