Let me try sending a proper debdiff this time. :)
diff -Nru efivar-0.15/debian/changelog efivar-0.15/debian/changelog
--- efivar-0.15/debian/changelog 2014-11-03 10:26:48.000000000 -0600
+++ efivar-0.15/debian/changelog 2014-12-17 22:28:23.000000000 -0600
@@ -1,3 +1,10 @@
+efivar (0.15-3) unstable; urgency=medium
+
+ * Partially fix #773007 by defining DataSize based on whether our kernel is
+ 32/64-bit.
+
+ -- Daniel Jared Dominguez <jared_doming...@dell.com> Wed, 17 Dec 2014
22:26:58 -0600
+
efivar (0.15-2) unstable; urgency=medium
* Apply upstream patches (Closes: #764386)
diff -Nru efivar-0.15/debian/patches/06-efi_variable_t.patch
efivar-0.15/debian/patches/06-efi_variable_t.patch
--- efivar-0.15/debian/patches/06-efi_variable_t.patch 1969-12-31
18:00:00.000000000 -0600
+++ efivar-0.15/debian/patches/06-efi_variable_t.patch 2014-12-17
22:20:45.000000000 -0600
@@ -0,0 +1,72 @@
+commit 55837047290031fb3c66bfba0438b874f5cbf3b9
+Author: Peter Jones <pjo...@redhat.com>
+Date: Tue Nov 11 16:13:49 2014 -0500
+
+ Don't name anything efi_variable_t; we're going to export that elsewhere.
+
+ Signed-off-by: Peter Jones <pjo...@redhat.com>
+
+diff --git a/src/efivarfs.c b/src/efivarfs.c
+index c456401..e85599f 100644
+--- a/src/efivarfs.c
++++ b/src/efivarfs.c
+@@ -39,11 +39,6 @@
+ # define EFIVARFS_MAGIC 0xde5e81e4
+ #endif
+
+-typedef struct efi_variable_t {
+- uint32_t Attributes;
+- uint8_t Data[];
+-} __attribute__((packed)) efi_variable_t;
+-
+ static int
+ efivarfs_probe(void)
+ {
+diff --git a/src/vars.c b/src/vars.c
+index ff00860..97487f0 100644
+--- a/src/vars.c
++++ b/src/vars.c
+@@ -31,14 +31,14 @@
+
+ #define VARS_PATH "/sys/firmware/efi/vars/"
+
+-typedef struct efi_variable_t {
++typedef struct efi_kernel_variable_t {
+ uint16_t VariableName[1024/sizeof(uint16_t)];
+ efi_guid_t VendorGuid;
+ uint64_t DataSize;
+ uint8_t Data[1024];
+ efi_status_t Status;
+ uint32_t Attributes;
+-} __attribute__((packed)) efi_variable_t;
++} __attribute__((packed)) efi_kernel_variable_t;
+
+ static int
+ get_size_from_file(const char *filename, size_t *retsize)
+@@ -160,7 +160,7 @@ vars_get_variable(efi_guid_t guid, const char *name,
uint8_t **data,
+ if (rc < 0)
+ goto err;
+
+- efi_variable_t *var = (void *)buf;
++ efi_kernel_variable_t *var = (void *)buf;
+
+ *data = malloc(var->DataSize);
+ if (!*data)
+@@ -207,7 +207,7 @@ vars_del_variable(efi_guid_t guid, const char *name)
+ goto err;
+
+ rc = read_file(fd, &buf, &buf_size);
+- if (rc < 0 || buf_size != sizeof(efi_variable_t))
++ if (rc < 0 || buf_size != sizeof(efi_kernel_variable_t))
+ goto err;
+
+ close(fd);
+@@ -327,7 +327,7 @@ vars_set_variable(efi_guid_t guid, const char *name,
uint8_t *data,
+ goto err;
+ }
+
+- efi_variable_t var = {
++ efi_kernel_variable_t var = {
+ .VendorGuid = guid,
+ .DataSize = data_size,
+ .Status = 0,
diff -Nru efivar-0.15/debian/patches/07-num_bits.patch
efivar-0.15/debian/patches/07-num_bits.patch
--- efivar-0.15/debian/patches/07-num_bits.patch 1969-12-31
18:00:00.000000000 -0600
+++ efivar-0.15/debian/patches/07-num_bits.patch 2014-12-17
22:30:24.000000000 -0600
@@ -0,0 +1,203 @@
+Based on commit d774e3699db4d04c72cf92e53c8161e9ac7ce2e2 (HEAD,
refs/remotes/upstream/master, refs/heads/upstream)
+(Slightly modified to pretend that the erroneous 487a9ea0 doesn't exist. :)
+
+Author: Peter Jones <pjo...@redhat.com>
+Date: Tue Dec 16 14:31:19 2014 -0500
+
+ Make efivar's vars.c interface choose between 32 and 64 bit at runtime.
+
+ We don't actually know what size the /kernel/ interface will use until
+ we're executed, because it's defined as "unsigned long", and we don't
+ know if a 32-bit build will be run on a 32-bit or 64-bit kernel. So in
+ this case, we figure it out from uname.
+
+ This makes the assumption that all the 64-bit arches we might care about
+ (ia64, x86_64, and aarch64) have "64" in "uname -m" somewhere, and that
+ none of the 32-bit architectures do.
+
+ This should resolve the conflict between 487a9ea and a01d106, and
+ resolve issue #12 .
+
+ Signed-off-by: Peter Jones <pjo...@redhat.com>
+
+--- a/src/vars.c
++++ b/src/vars.c
+@@ -15,15 +15,15 @@
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+-
+ #include <errno.h>
+ #include <fcntl.h>
+ #include <limits.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+-#include <sys/types.h>
+ #include <sys/stat.h>
++#include <sys/types.h>
++#include <sys/utsname.h>
+
+ #include "lib.h"
+ #include "generics.h"
+@@ -31,14 +31,49 @@
+
+ #define VARS_PATH "/sys/firmware/efi/vars/"
+
+-typedef struct efi_kernel_variable_t {
++typedef struct efi_kernel_variable_32_t {
++ uint16_t VariableName[1024/sizeof(uint16_t)];
++ efi_guid_t VendorGuid;
++ uint32_t DataSize;
++ uint8_t Data[1024];
++ efi_status_t Status;
++ uint32_t Attributes;
++} __attribute__((packed)) efi_kernel_variable_32_t;
++
++typedef struct efi_kernel_variable_64_t {
+ uint16_t VariableName[1024/sizeof(uint16_t)];
+ efi_guid_t VendorGuid;
+ uint64_t DataSize;
+ uint8_t Data[1024];
+ efi_status_t Status;
+ uint32_t Attributes;
+-} __attribute__((packed)) efi_kernel_variable_t;
++} __attribute__((packed)) efi_kernel_variable_64_t;
++
++/*
++ * Is there a better way to know if you're on a 64-bit kernel than this?
++ * Submit your patch here today!
++ */
++static int
++is_64bit(void)
++{
++ struct utsname utsname;
++ char machine[sizeof(utsname.machine) + 1];
++ static int sixtyfour_bit = -1;
++
++ if (sixtyfour_bit != -1)
++ return sixtyfour_bit;
++
++ int rc = uname(&utsname);
++ if (rc < 0)
++ return rc;
++
++ strncpy(machine, utsname.machine, sizeof(utsname.machine));
++ machine[sizeof(utsname.machine)] = '\0';
++ sixtyfour_bit = 0;
++ if (strstr(machine, "64") != NULL)
++ sixtyfour_bit = 1;
++ return sixtyfour_bit;
++}
+
+ static int
+ get_size_from_file(const char *filename, size_t *retsize)
+@@ -81,6 +116,9 @@
+ static int
+ vars_probe(void)
+ {
++ /* If we can't tell if it's 64bit or not, this interface is no good. */
++ if (is_64bit() < 0)
++ return 0;
+ if (!access(VARS_PATH "new_var", F_OK))
+ return 1;
+ return 0;
+@@ -160,14 +198,26 @@
+ if (rc < 0)
+ goto err;
+
+- efi_kernel_variable_t *var = (void *)buf;
+
+- *data = malloc(var->DataSize);
+- if (!*data)
+- goto err;
+- memcpy(*data, var->Data, var->DataSize);
+- *data_size = var->DataSize;
+- *attributes = var->Attributes;
++ if (is_64bit()) {
++ efi_kernel_variable_64_t *var64 = (void *)buf;
++
++ *data = malloc(var64->DataSize);
++ if (!*data)
++ goto err;
++ memcpy(*data, var64->Data, var64->DataSize);
++ *data_size = var64->DataSize;
++ *attributes = var64->Attributes;
++ } else {
++ efi_kernel_variable_32_t *var32 = (void *)buf;
++
++ *data = malloc(var32->DataSize);
++ if (!*data)
++ goto err;
++ memcpy(*data, var32->Data, var32->DataSize);
++ *data_size = var32->DataSize;
++ *attributes = var32->Attributes;
++ }
+
+ ret = 0;
+ err:
+@@ -207,7 +257,8 @@
+ goto err;
+
+ rc = read_file(fd, &buf, &buf_size);
+- if (rc < 0 || buf_size != sizeof(efi_kernel_variable_t))
++ if (rc < 0 || (buf_size != sizeof(efi_kernel_variable_64_t) &&
++ buf_size != sizeof(efi_kernel_variable_32_t)))
+ goto err;
+
+ close(fd);
+@@ -327,20 +378,41 @@
+ goto err;
+ }
+
+- efi_kernel_variable_t var = {
+- .VendorGuid = guid,
+- .DataSize = data_size,
+- .Status = 0,
+- .Attributes = attributes
+- };
+- for (int i = 0; name[i] != '\0'; i++)
+- var.VariableName[i] = name[i];
+- memcpy(var.Data, data, data_size);
++ if (is_64bit()) {
++ efi_kernel_variable_64_t var64 = {
++ .VendorGuid = guid,
++ .DataSize = data_size,
++ .Status = 0,
++ .Attributes = attributes
++ };
++
++ for (int i = 0; name[i] != '\0'; i++)
++ var64.VariableName[i] = name[i];
++ memcpy(var64.Data, data, data_size);
++
++ fd = open(VARS_PATH "new_var", O_WRONLY);
++ if (fd < 0)
++ goto err;
++
++ rc = write(fd, &var64, sizeof(var64));
++ } else {
++ efi_kernel_variable_32_t var32 = {
++ .VendorGuid = guid,
++ .DataSize = data_size,
++ .Status = 0,
++ .Attributes = attributes
++ };
++ for (int i = 0; name[i] != '\0'; i++)
++ var32.VariableName[i] = name[i];
++ memcpy(var32.Data, data, data_size);
++
++ fd = open(VARS_PATH "new_var", O_WRONLY);
++ if (fd < 0)
++ goto err;
++
++ rc = write(fd, &var32, sizeof(var32));
++ }
+
+- fd = open(VARS_PATH "new_var", O_WRONLY);
+- if (fd < 0)
+- goto err;
+- rc = write(fd, &var, sizeof(var));
+ if (rc >= 0)
+ ret = 0;
+
diff -Nru efivar-0.15/debian/patches/series efivar-0.15/debian/patches/series
--- efivar-0.15/debian/patches/series 2014-11-03 10:27:26.000000000 -0600
+++ efivar-0.15/debian/patches/series 2014-12-17 22:20:45.000000000 -0600
@@ -3,3 +3,5 @@
03-errno.patch
04-enomem.patch
05-8k_vars.patch
+06-efi_variable_t.patch
+07-num_bits.patch
--
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