From 11335c0439aa76bc5ed32b1ccfcab9995e2eac6b Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Sun, 8 Sep 2019 10:45:31 +0200 Subject: efi_loader: check parameters EFI_FILE_PROTOCOL.GetInfo() 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 --- lib/efi_loader/efi_file.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib') diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c index 3a108c6..71582e5 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); -- cgit v1.1