Check the parameters of EFI_FILE_PROTOCOL.GetInfo() to avoid possible NULL
dereference.
Check the buffer size for EFI_FILE_SYSTEM_INFO.
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
lib/efi_loader/efi_file.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
index 2f03ae71fc..b79dc5fd29 100644
--- a/lib/efi_loader/efi_file.c
+++ b/lib/efi_loader/efi_file.c
@@ -596,6 +596,12 @@ static efi_status_t EFIAPI efi_file_getinfo(struct
efi_file_handle *file,
EFI_ENTRY("%p, %pUl, %p, %p", file, info_type, buffer_size, buffer);
+ if (!file || !info_type || !buffer_size ||
+ (*buffer_size && !buffer)) {
+ ret = EFI_INVALID_PARAMETER;
+ goto error;
+ }
+
if (!guidcmp(info_type, &efi_file_info_guid)) {
struct efi_file_info *info = buffer;
char *filename = basename(fh);
--
2.23.0
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