If a single memory block is requested (GRUB_MM_ADD_REGION_CONSECUTIVE)
then check early on whether the given block from the memory map is
big enough to satisfy the request.
Signed-off-by: Stefan Berger <stef...@linux.ibm.com>
Cc: Hari Bathini <hbath...@linux.ibm.com>
Cc: Pavithra Prakash <pavra...@in.ibm.com>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Carolyn Scherrer <cpsch...@us.ibm.com>
Cc: Mahesh Salgaonkar <mah...@linux.ibm.com>
Cc: Sourabh Jain <sourabhj...@linux.ibm.com>
---
grub-core/kern/ieee1275/init.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index e09db4192..a0ce9d55e 100644
--- a/grub-core/kern/ieee1275/init.c
+++ b/grub-core/kern/ieee1275/init.c
@@ -328,6 +328,10 @@ regions_claim (grub_uint64_t addr, grub_uint64_t len,
grub_memory_type_t type,
if (type != GRUB_MEMORY_AVAILABLE)
return 0;
+ /* If a specific size was requested: is this chunk big enough? */
+ if (rcr->flags & GRUB_MM_ADD_REGION_CONSECUTIVE && len < rcr->total)
+ return 0;
+
/* Do not consider memory beyond 4GB */
if (addr > 0xffffffffULL)
return 0;
--
2.25.1
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
https://lists.gnu.org/mailman/listinfo/grub-devel
