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* Fix EFI boot regression introduced during the merge window where the

Browse source 
firmware was reading random values from the stack because we were
    passing a pointer to the wrong object type.
 
  * Kernel corruption has been reported when booting with the EFI boot
    stub which was tracked down to setting a bogus value for
    bp->hdr.code32_start, resulting in corruption during relocation.
 
  * Olivier Martin reported that the wrong file handles were being passed
    to efi_file_(read|close), which works for x86 by luck due to the way
    that the FAT driver is implemented, but doesn't work on ARM.
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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent

Pull EFI fixes from Matt Fleming:

"* Fix EFI boot regression introduced during the merge window where the
   firmware was reading random values from the stack because we were
   passing a pointer to the wrong object type.

 * Kernel corruption has been reported when booting with the EFI boot
   stub which was tracked down to setting a bogus value for
   bp->hdr.code32_start, resulting in corruption during relocation.

 * Olivier Martin reported that the wrong file handles were being passed
   to efi_file_(read|close), which works for x86 by luck due to the way
   that the FAT driver is implemented, but doesn't work on ARM."

Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Ingo Molnar 2014-04-11 10:25:28 +02:00
commit 3151b942ba
4 changed files with 18 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/firmware/efi/efi-stub-helper.c
View file

@ -397,7 +397,7 @@ static efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
else
chunksize = size;
status = efi_file_read(fh, files[j].handle,
status = efi_file_read(files[j].handle,
&chunksize,
(void *)addr);
if (status != EFI_SUCCESS) {
@ -408,7 +408,7 @@ static efi_status_t handle_cmdline_files(efi_system_table_t *sys_table_arg,
size -= chunksize;
}
efi_file_close(fh, files[j].handle);
efi_file_close(files[j].handle);
}
}
@ -425,7 +425,7 @@ free_file_total:
close_handles:
for (k = j; k < i; k++)
efi_file_close(fh, files[k].handle);
efi_file_close(files[k].handle);
free_files:
efi_call_early(free_pool, files);
fail: