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From 1fa1b51356c0ea6e1d30f2d370b3b766d4230537 Mon Sep 17 00:00:00 2001
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From: Mike Christie <michaelc@cs.wisc.edu>
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Date: Thu, 5 Dec 2013 18:12:32 -0600
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Subject: [PATCH] iscsi tools: Bug fix on IPC address copy (version 2)
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This patch merges Yufei Ren <yufei.ren@stonybrook.edu> patch
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with comments from the list plus what I think is a bug in the
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addr_len usage.
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For the addr_len use, it looks like we were using that as the
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arg to memcpy, but that value included the length of the pathname
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string and also the offset of sun_path in the sockaddr_un and so
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that is too long.
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---
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usr/iscsi_util.c | 12 ++++++++++++
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usr/iscsi_util.h | 3 +++
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usr/iscsid_req.c | 7 +------
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usr/mgmt_ipc.c | 6 +-----
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4 files changed, 17 insertions(+), 11 deletions(-)
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diff --git a/usr/iscsi_util.c b/usr/iscsi_util.c
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index ac86847..9dbfbfd 100644
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--- a/usr/iscsi_util.c
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+++ b/usr/iscsi_util.c
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@@ -25,16 +25,28 @@
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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+#include <sys/socket.h>
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+#include <sys/un.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/resource.h>
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+#include "sysdeps.h"
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#include "log.h"
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#include "iscsi_settings.h"
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#include "iface.h"
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#include "session_info.h"
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#include "iscsi_util.h"
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+int setup_abstract_addr(struct sockaddr_un *addr, char *unix_sock_name)
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+{
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+ memset(addr, 0, sizeof(*addr));
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+ addr->sun_family = AF_LOCAL;
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+ strlcpy(addr->sun_path + 1, unix_sock_name, sizeof(addr->sun_path) - 1);
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+ return offsetof(struct sockaddr_un, sun_path) +
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+ strlen(addr->sun_path + 1) + 1;
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+}
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+
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void daemon_init(void)
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{
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int fd;
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diff --git a/usr/iscsi_util.h b/usr/iscsi_util.h
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index 110dfa8..ff725eb 100644
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--- a/usr/iscsi_util.h
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+++ b/usr/iscsi_util.h
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@@ -26,4 +26,7 @@ extern int __iscsi_match_session(struct node_rec *rec, char *targetname,
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extern char *strstrip(char *s);
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extern char *cfg_get_string_param(char *pathname, const char *key);
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+struct sockaddr_un;
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+extern int setup_abstract_addr(struct sockaddr_un *addr, char *unix_sock_name);
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+
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#endif
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diff --git a/usr/iscsid_req.c b/usr/iscsid_req.c
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index 715c0aa..0e91dee 100644
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--- a/usr/iscsid_req.c
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+++ b/usr/iscsid_req.c
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@@ -67,12 +67,7 @@ static int ipc_connect(int *fd, char *unix_sock_name, int start_iscsid)
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return ISCSI_ERR_ISCSID_NOTCONN;
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}
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- addr_len = offsetof(struct sockaddr_un, sun_path) + strlen(unix_sock_name) + 1;
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-
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- memset(&addr, 0, sizeof(addr));
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- addr.sun_family = AF_LOCAL;
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- memcpy((char *) &addr.sun_path + 1, unix_sock_name,
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- strlen(unix_sock_name));
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+ addr_len = setup_abstract_addr(&addr, unix_sock_name);
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/*
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* Trying to connect with exponential backoff
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diff --git a/usr/mgmt_ipc.c b/usr/mgmt_ipc.c
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index 87bd346..a82c063 100644
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--- a/usr/mgmt_ipc.c
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+++ b/usr/mgmt_ipc.c
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@@ -59,11 +59,7 @@ mgmt_ipc_listen(void)
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return fd;
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}
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- addr_len = offsetof(struct sockaddr_un, sun_path) + strlen(ISCSIADM_NAMESPACE) + 1;
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-
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- memset(&addr, 0, sizeof(addr));
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- addr.sun_family = AF_LOCAL;
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- memcpy((char *) &addr.sun_path + 1, ISCSIADM_NAMESPACE, addr_len);
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+ addr_len = setup_abstract_addr(&addr, ISCSIADM_NAMESPACE);
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if ((err = bind(fd, (struct sockaddr *) &addr, addr_len)) < 0 ) {
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log_error("Can not bind IPC socket");
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--
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1.8.3.1
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