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loader/efi/linux: Return correct size from LoadFile2

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From UEFI specifications 2.10, section 13.2.2, EFI_LOAD_FILE2_PROTOCOL.LoadFile
(see https://uefi.org/specs/UEFI/2.10/13_Protocols_Media_Access.html), for BufferSize:

  On input the size of Buffer in bytes. On output with a return code
  of EFI_SUCCESS, the amount of data transferred to Buffer. On output
  with a return code of EFI_BUFFER_TOO_SMALL, the size of Buffer
  required to retrieve the requested file.

So, set *buffer_size correctly.

Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Frediano Ziglio 2025-07-16 09:06:09 +01:00 committed by Daniel Kiper
parent f326c5c475
commit 6831d242ad
1 changed files with 2 additions and 0 deletions
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2
grub-core/loader/efi/linux.c
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@ -372,6 +372,8 @@ grub_efi_initrd_load_file2 (grub_efi_load_file2_t *this,
if (grub_initrd_load (&initrd_ctx, buffer))
status = GRUB_EFI_DEVICE_ERROR;
else
*buffer_size = initrd_size;
grub_initrd_close (&initrd_ctx);
return status;