oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

Introduce macro for common plugin structure elements

Browse Source 
Heimdal's HDB plugin interface, and hence Samba's KDC that depends upon
it, doesn't work on 32-bit builds due to structure fields being arranged
in the wrong order. This problem presents itself in the form of
segmentation faults on 32-bit systems, but goes unnoticed on 64-bit
builds thanks to extra structure padding absorbing the errant fields.

This commit reorders the HDB plugin structure fields to prevent crashes
and introduces a common macro to ensure every plugin presents a
consistent interface.

Samba BUG: https://bugzilla.samba.org/show_bug.cgi?id=15110

Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This commit is contained in:
Joseph Sutton
2022-10-22 10:11:53 +13:00
committed by Nico Williams
parent 16179383fb
commit cfb32a638e
17 changed files with 57 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
lib/base/common_plugin.h
View File

@@ -36,6 +36,8 @@
#ifndef HEIMDAL_BASE_COMMON_PLUGIN_H
#define HEIMDAL_BASE_COMMON_PLUGIN_H
#include <heimbase-svc.h>
#ifdef _WIN32
# ifndef HEIM_CALLCONV
# define HEIM_CALLCONV __stdcall
@@ -69,9 +71,7 @@ typedef heim_get_instance_func_t krb5_get_instance_t;
* All plugin function tables extend the following structure.
*/
struct heim_plugin_common_ftable_desc {
int version;
int (HEIM_LIB_CALL *init)(heim_pcontext, void **);
void (HEIM_LIB_CALL *fini)(void *);
HEIM_PLUGIN_FTABLE_COMMON_ELEMENTS(heim_pcontext);
};
typedef struct heim_plugin_common_ftable_desc heim_plugin_common_ftable;
typedef struct heim_plugin_common_ftable_desc *heim_plugin_common_ftable_p;