This is a note to let you know that I've just added the patch titled
efi: Use ucs2_as_utf8 in efivarfs instead of open coding a bad version
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
efi-use-ucs2_as_utf8-in-efivarfs-instead-of-open-coding-a-bad-version.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e0d64e6a880e64545ad7d55786aa84ab76bac475 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@xxxxxxxxxx>
Date: Mon, 8 Feb 2016 14:48:12 -0500
Subject: efi: Use ucs2_as_utf8 in efivarfs instead of open coding a bad version
From: Peter Jones <pjones@xxxxxxxxxx>
commit e0d64e6a880e64545ad7d55786aa84ab76bac475 upstream.
Translate EFI's UCS-2 variable names to UTF-8 instead of just assuming
all variable names fit in ASCII.
Signed-off-by: Peter Jones <pjones@xxxxxxxxxx>
Acked-by: Matthew Garrett <mjg59@xxxxxxxxxx>
Tested-by: Lee, Chun-Yi <jlee@xxxxxxxx>
Signed-off-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/firmware/efi/efivars.c | 28 ++++++++++------------------
fs/efivarfs/super.c | 7 +++----
2 files changed, 13 insertions(+), 22 deletions(-)
--- a/drivers/firmware/efi/efivars.c
+++ b/drivers/firmware/efi/efivars.c
@@ -409,35 +409,27 @@ efivar_create_sysfs_entry(struct efivar_
{
int i, short_name_size;
char *short_name;
- unsigned long variable_name_size;
- efi_char16_t *variable_name;
-
- variable_name = new_var->var.VariableName;
- variable_name_size = ucs2_strlen(variable_name) * sizeof(efi_char16_t);
+ unsigned long utf8_name_size;
+ efi_char16_t *variable_name = new_var->var.VariableName;
/*
- * Length of the variable bytes in ASCII, plus the '-' separator,
+ * Length of the variable bytes in UTF8, plus the '-' separator,
* plus the GUID, plus trailing NUL
*/
- short_name_size = variable_name_size / sizeof(efi_char16_t)
- + 1 + EFI_VARIABLE_GUID_LEN + 1;
-
- short_name = kzalloc(short_name_size, GFP_KERNEL);
+ utf8_name_size = ucs2_utf8size(variable_name);
+ short_name_size = utf8_name_size + 1 + EFI_VARIABLE_GUID_LEN + 1;
+ short_name = kmalloc(short_name_size, GFP_KERNEL);
if (!short_name)
return 1;
- /* Convert Unicode to normal chars (assume top bits are 0),
- ala UTF-8 */
- for (i=0; i < (int)(variable_name_size / sizeof(efi_char16_t)); i++) {
- short_name[i] = variable_name[i] & 0xFF;
- }
+ ucs2_as_utf8(short_name, variable_name, short_name_size);
+
/* This is ugly, but necessary to separate one vendor's
private variables from another's. */
-
- *(short_name + strlen(short_name)) = '-';
+ short_name[utf8_name_size] = '-';
efi_guid_unparse(&new_var->var.VendorGuid,
- short_name + strlen(short_name));
+ short_name + utf8_name_size + 1);
new_var->kobj.kset = efivars_kset;
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -118,7 +118,7 @@ static int efivarfs_callback(efi_char16_
struct dentry *dentry, *root = sb->s_root;
unsigned long size = 0;
char *name;
- int len, i;
+ int len;
int err = -ENOMEM;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
@@ -128,15 +128,14 @@ static int efivarfs_callback(efi_char16_
memcpy(entry->var.VariableName, name16, name_size);
memcpy(&(entry->var.VendorGuid), &vendor, sizeof(efi_guid_t));
- len = ucs2_strlen(entry->var.VariableName);
+ len = ucs2_utf8size(entry->var.VariableName);
/* name, plus '-', plus GUID, plus NUL*/
name = kmalloc(len + 1 + EFI_VARIABLE_GUID_LEN + 1, GFP_KERNEL);
if (!name)
goto fail;
- for (i = 0; i < len; i++)
- name[i] = entry->var.VariableName[i] & 0xFF;
+ ucs2_as_utf8(name, entry->var.VariableName, len);
name[len] = '-';
Patches currently in stable-queue which might be from pjones@xxxxxxxxxx are
queue-3.14/lib-ucs2_string-add-ucs2-utf8-helper-functions.patch
queue-3.14/lib-ucs2_string-correct-ucs2-utf8-conversion.patch
queue-3.14/efi-do-variable-name-validation-tests-in-utf8.patch
queue-3.14/efi-make-efivarfs-entries-immutable-by-default.patch
queue-3.14/efi-add-pstore-variables-to-the-deletion-whitelist.patch
queue-3.14/efi-make-our-variable-validation-list-include-the-guid.patch
queue-3.14/efi-use-ucs2_as_utf8-in-efivarfs-instead-of-open-coding-a-bad-version.patch
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