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authorJean Tourrilhes <jt@hpl.hp.com>2007-03-23 00:31:16 +0000
committerJohn W. Linville <linville@tuxdriver.com>2007-03-27 14:10:26 -0400
commitc2805fbb8630abb95d94ce7adc3f97976f7e0367 (patch)
treeca94be7f103d430d38ef6543db597e90f3a63999 /include
parented4bb1063171b2f44a40b0a9c400dedb0590dce6 (diff)
[PATCH] WE-22 : prevent information leak on 64 bit
Johannes Berg discovered that kernel space was leaking to userspace on 64 bit platform. He made a first patch to fix that. This is an improved version of his patch. Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/wireless.h21
-rw-r--r--include/net/iw_handler.h30
2 files changed, 39 insertions, 12 deletions
diff --git a/include/linux/wireless.h b/include/linux/wireless.h
index 447c52beb691..48759b2f57d7 100644
--- a/include/linux/wireless.h
+++ b/include/linux/wireless.h
@@ -1,10 +1,10 @@
/*
* This file define a set of standard wireless extensions
*
- * Version : 21 14.3.06
+ * Version : 22 16.3.07
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 1997-2006 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 1997-2007 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _LINUX_WIRELESS_H
@@ -85,7 +85,7 @@
* (there is some stuff that will be added in the future...)
* I just plan to increment with each new version.
*/
-#define WIRELESS_EXT 21
+#define WIRELESS_EXT 22
/*
* Changes :
@@ -221,6 +221,10 @@
* - Add IW_RETRY_SHORT/IW_RETRY_LONG retry modifiers
* - Power/Retry relative values no longer * 100000
* - Add explicit flag to tell stats are in 802.11k RCPI : IW_QUAL_RCPI
+ *
+ * V21 to V22
+ * ----------
+ * - Prevent leaking of kernel space in stream on 64 bits.
*/
/**************************** CONSTANTS ****************************/
@@ -1085,4 +1089,15 @@ struct iw_event
#define IW_EV_POINT_LEN (IW_EV_LCP_LEN + sizeof(struct iw_point) - \
IW_EV_POINT_OFF)
+/* Size of the Event prefix when packed in stream */
+#define IW_EV_LCP_PK_LEN (4)
+/* Size of the various events when packed in stream */
+#define IW_EV_CHAR_PK_LEN (IW_EV_LCP_PK_LEN + IFNAMSIZ)
+#define IW_EV_UINT_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(__u32))
+#define IW_EV_FREQ_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_freq))
+#define IW_EV_PARAM_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_param))
+#define IW_EV_ADDR_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct sockaddr))
+#define IW_EV_QUAL_PK_LEN (IW_EV_LCP_PK_LEN + sizeof(struct iw_quality))
+#define IW_EV_POINT_PK_LEN (IW_EV_LCP_LEN + 4)
+
#endif /* _LINUX_WIRELESS_H */
diff --git a/include/net/iw_handler.h b/include/net/iw_handler.h
index 10559e937d27..8a830188354d 100644
--- a/include/net/iw_handler.h
+++ b/include/net/iw_handler.h
@@ -1,10 +1,10 @@
/*
* This file define the new driver API for Wireless Extensions
*
- * Version : 7 18.3.05
+ * Version : 8 16.3.07
*
* Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
- * Copyright (c) 2001-2006 Jean Tourrilhes, All Rights Reserved.
+ * Copyright (c) 2001-2007 Jean Tourrilhes, All Rights Reserved.
*/
#ifndef _IW_HANDLER_H
@@ -207,7 +207,7 @@
* will be needed...
* I just plan to increment with each new version.
*/
-#define IW_HANDLER_VERSION 7
+#define IW_HANDLER_VERSION 8
/*
* Changes :
@@ -239,6 +239,10 @@
* - Remove (struct iw_point *)->pointer from events and streams
* - Remove spy_offset from struct iw_handler_def
* - Add "check" version of event macros for ieee802.11 stack
+ *
+ * V7 to V8
+ * ----------
+ * - Prevent leaking of kernel space in stream on 64 bits.
*/
/**************************** CONSTANTS ****************************/
@@ -500,7 +504,11 @@ iwe_stream_add_event(char * stream, /* Stream of events */
/* Check if it's possible */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, event_len);
+ /* Beware of alignement issues on 64 bits */
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
+ memcpy(stream + IW_EV_LCP_LEN,
+ ((char *) iwe) + IW_EV_LCP_LEN,
+ event_len - IW_EV_LCP_LEN);
stream += event_len;
}
return stream;
@@ -521,10 +529,10 @@ iwe_stream_add_point(char * stream, /* Stream of events */
/* Check if it's possible */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, IW_EV_LCP_LEN);
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
memcpy(stream + IW_EV_LCP_LEN,
((char *) iwe) + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
- IW_EV_POINT_LEN - IW_EV_LCP_LEN);
+ IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
memcpy(stream + IW_EV_POINT_LEN, extra, iwe->u.data.length);
stream += event_len;
}
@@ -574,7 +582,11 @@ iwe_stream_check_add_event(char * stream, /* Stream of events */
/* Check if it's possible, set error if not */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, event_len);
+ /* Beware of alignement issues on 64 bits */
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
+ memcpy(stream + IW_EV_LCP_LEN,
+ ((char *) iwe) + IW_EV_LCP_LEN,
+ event_len - IW_EV_LCP_LEN);
stream += event_len;
} else
*perr = -E2BIG;
@@ -598,10 +610,10 @@ iwe_stream_check_add_point(char * stream, /* Stream of events */
/* Check if it's possible */
if(likely((stream + event_len) < ends)) {
iwe->len = event_len;
- memcpy(stream, (char *) iwe, IW_EV_LCP_LEN);
+ memcpy(stream, (char *) iwe, IW_EV_LCP_PK_LEN);
memcpy(stream + IW_EV_LCP_LEN,
((char *) iwe) + IW_EV_LCP_LEN + IW_EV_POINT_OFF,
- IW_EV_POINT_LEN - IW_EV_LCP_LEN);
+ IW_EV_POINT_PK_LEN - IW_EV_LCP_PK_LEN);
memcpy(stream + IW_EV_POINT_LEN, extra, iwe->u.data.length);
stream += event_len;
} else