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efi_loader: check parameters EFI_FILE_PROTOCOL.GetInfo()

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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.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2019-09-08 10:45:31 +02:00
parent 632834ce6d
commit 11335c0439
1 changed files with 6 additions and 0 deletions
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6
lib/efi_loader/efi_file.c
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@@ -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);