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efi_loader: Fix potential deref-after-null

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After having been compared to a NULL value at efi_disk.c:426,
pointer 'part_info' is dereferenced at efi_disk.c:534.

Signed-off-by: Maks Mishin <maks.mishinFZ@gmail.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Maks Mishin 2025-02-02 20:59:40 +03:00 committed by Heinrich Schuchardt
parent 87ef1987de
commit 80908fee77
1 changed files with 2 additions and 1 deletions
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3
lib/efi_loader/efi_disk.c
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@ -531,7 +531,8 @@ static efi_status_t efi_disk_add_dev(
/* Store first EFI system partition */ /* Store first EFI system partition */
if (part && efi_system_partition.uclass_id == UCLASS_INVALID) { if (part && efi_system_partition.uclass_id == UCLASS_INVALID) {
if (part_info->bootable & PART_EFI_SYSTEM_PARTITION) { if (part_info &&
part_info->bootable & PART_EFI_SYSTEM_PARTITION) {
efi_system_partition.uclass_id = desc->uclass_id; efi_system_partition.uclass_id = desc->uclass_id;
efi_system_partition.devnum = desc->devnum; efi_system_partition.devnum = desc->devnum;
efi_system_partition.part = part; efi_system_partition.part = part;