From: Stephen Warren <swar...@nvidia.com>
Enhance get_partition_info_efi() to range-check the partition number.
This prevents invalid partitions being accessed, and prevents access
beyond the end of the gpt_pte[] array.
Signed-off-by: Stephen Warren <swar...@nvidia.com>
---
v2: New patch
---
disk/part_efi.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/disk/part_efi.c b/disk/part_efi.c
index 02927a0..2962fd8 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -173,6 +173,13 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc,
int part,
return -1;
}
+ if (part > le32_to_int(gpt_head->num_partition_entries) ||
+ !is_pte_valid(&gpt_pte[part - 1])) {
+ printf("%s: *** ERROR: Invalid partition number %d ***\n",
+ __func__, part);
+ return -1;
+ }
+
/* The ulong casting limits the maximum disk size to 2 TB */
info->start = (ulong) le64_to_int(gpt_pte[part - 1].starting_lba);
/* The ending LBA is inclusive, to calculate size, add 1 to it */
--
1.7.0.4
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