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gpt: properly check that GPT is valid

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This commit is contained in:
CTCaer
2021-03-17 09:14:50 +02:00
parent f21f13b15d
commit 6981c59de3
3 changed files with 20 additions and 7 deletions
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5
bootloader/storage/nx_emmc.c
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@@ -34,6 +34,10 @@ void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
emummc_storage_read(NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, gpt_buf);
// Check if no GPT or more than max allowed entries.
if (memcmp(&gpt_buf->header.signature, "EFI PART", 8) || gpt_buf->header.num_part_ents > 128)
goto out;
for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
{
emmc_part_t *part = (emmc_part_t *)calloc(sizeof(emmc_part_t), 1);
@@ -54,6 +58,7 @@ void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
list_append(gpt, &part->link);
}
out:
free(gpt_buf);
}