systemd/0575-kdbus-fix-buffer-overflow-in-bus_get_owner_kdbus-fun.patch
Zbigniew Jędrzejewski-Szmek f1004dc2ae Update to latest git
2014-10-10 14:56:53 -04:00

45 lines
1.8 KiB
Diff

From 82279e696605fe4eeadd1ca3744c76c8790f885b Mon Sep 17 00:00:00 2001
From: Lukasz Skalski <l.skalski@samsung.com>
Date: Fri, 10 Oct 2014 12:29:04 +0200
Subject: [PATCH] kdbus: fix buffer overflow in bus_get_owner_kdbus() function
Commit 710fc9779b7c (kdbus repo) introduced attaching items[]
instead of name[] in kdbus_cmd_conn_info struct. Commit 581fe6c81
(systemd repo) caught up with this change, but item size was not
properly calculated.
---
src/libsystemd/sd-bus/bus-control.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index dbd94fc46b..7b106a3274 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -398,7 +398,7 @@ static int bus_get_owner_kdbus(
struct kdbus_cmd_conn_info *cmd;
struct kdbus_conn_info *conn_info;
struct kdbus_item *item;
- size_t size;
+ size_t size, l;
uint64_t m, id;
int r;
@@ -410,13 +410,12 @@ static int bus_get_owner_kdbus(
cmd = alloca0_align(size, 8);
cmd->id = id;
} else {
- size_t item_size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-
- size = offsetof(struct kdbus_cmd_conn_info, items) + item_size;
+ l = strlen(name) + 1;
+ size = offsetof(struct kdbus_cmd_conn_info, items) + KDBUS_ITEM_SIZE(l);
cmd = alloca0_align(size, 8);
- cmd->items[0].size = item_size;
+ cmd->items[0].size = KDBUS_ITEM_HEADER_SIZE + l;
cmd->items[0].type = KDBUS_ITEM_NAME;
- strcpy(cmd->items[0].str, name);
+ memcpy(cmd->items[0].str, name, l);
}
cmd->size = size;