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-rw-r--r--nscd/nscd-client.h5
-rw-r--r--nscd/nscd_getai.c5
-rw-r--r--nscd/nscd_getgr_r.c5
-rw-r--r--nscd/nscd_gethst_r.c6
-rw-r--r--nscd/nscd_getpw_r.c5
-rw-r--r--nscd/nscd_getserv_r.c5
-rw-r--r--nscd/nscd_helper.c27
-rw-r--r--nscd/nscd_initgroups.c5
8 files changed, 41 insertions, 22 deletions
diff --git a/nscd/nscd-client.h b/nscd/nscd-client.h
index 3c9688fd30..f66a658d2a 100644
--- a/nscd/nscd-client.h
+++ b/nscd/nscd-client.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 1998, 1999, 2000, 2003, 2004, 2005, 2006, 2007
+/* Copyright (c) 1998, 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
@@ -329,7 +329,8 @@ static inline int __nscd_drop_map_ref (struct mapped_database *map,
extern struct datahead *__nscd_cache_search (request_type type,
const char *key,
size_t keylen,
- const struct mapped_database *mapped);
+ const struct mapped_database *mapped,
+ size_t datalen);
/* Wrappers around read, readv and write that only read/write less than LEN
bytes on error or EOF. */
diff --git a/nscd/nscd_getai.c b/nscd/nscd_getai.c
index 674a5e7514..d1c5cd14e9 100644
--- a/nscd/nscd_getai.c
+++ b/nscd/nscd_getai.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
@@ -75,7 +76,7 @@ __nscd_getai (const char *key, struct nscd_ai_result **result, int *h_errnop)
if (mapped != NO_MAPPING)
{
struct datahead *found = __nscd_cache_search (GETAI, key, keylen,
- mapped);
+ mapped, sizeof ai_resp);
if (found != NULL)
{
respdata = (char *) (&found->data[0].aidata + 1);
diff --git a/nscd/nscd_getgr_r.c b/nscd/nscd_getgr_r.c
index b84b06b3ce..c2d204c3c8 100644
--- a/nscd/nscd_getgr_r.c
+++ b/nscd/nscd_getgr_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998-2000, 2002-2005, 2006, 2007
+/* Copyright (C) 1998-2000, 2002-2005, 2006, 2007, 2009
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998.
@@ -107,7 +107,8 @@ nscd_getgr_r (const char *key, size_t keylen, request_type type,
if (mapped != NO_MAPPING)
{
- struct datahead *found = __nscd_cache_search (type, key, keylen, mapped);
+ struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
+ sizeof gr_resp);
if (found != NULL)
{
len = (const uint32_t *) (&found->data[0].grdata + 1);
diff --git a/nscd/nscd_gethst_r.c b/nscd/nscd_gethst_r.c
index aea8288594..70631fa961 100644
--- a/nscd/nscd_gethst_r.c
+++ b/nscd/nscd_gethst_r.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1998-2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 1998-2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
@@ -137,7 +138,8 @@ nscd_gethst_r (const char *key, size_t keylen, request_type type,
if (mapped != NO_MAPPING)
{
/* No const qualifier, as it can change during garbage collection. */
- struct datahead *found = __nscd_cache_search (type, key, keylen, mapped);
+ struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
+ sizeof hst_resp);
if (found != NULL)
{
h_name = (char *) (&found->data[0].hstdata + 1);
diff --git a/nscd/nscd_getpw_r.c b/nscd/nscd_getpw_r.c
index 21f792bb4e..8a4449d186 100644
--- a/nscd/nscd_getpw_r.c
+++ b/nscd/nscd_getpw_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999, 2003, 2004, 2005, 2007
+/* Copyright (C) 1998, 1999, 2003, 2004, 2005, 2007, 2009
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998.
@@ -104,7 +104,8 @@ nscd_getpw_r (const char *key, size_t keylen, request_type type,
if (mapped != NO_MAPPING)
{
- struct datahead *found = __nscd_cache_search (type, key, keylen, mapped);
+ struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
+ sizeof pw_resp);
if (found != NULL)
{
pw_name = (const char *) (&found->data[0].pwdata + 1);
diff --git a/nscd/nscd_getserv_r.c b/nscd/nscd_getserv_r.c
index b1ad7e2e43..dce4165482 100644
--- a/nscd/nscd_getserv_r.c
+++ b/nscd/nscd_getserv_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.
@@ -104,7 +104,8 @@ nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
if (mapped != NO_MAPPING)
{
- struct datahead *found = __nscd_cache_search (type, key, keylen, mapped);
+ struct datahead *found = __nscd_cache_search (type, key, keylen, mapped,
+ sizeof serv_resp);
if (found != NULL)
{
diff --git a/nscd/nscd_helper.c b/nscd/nscd_helper.c
index cd3fa24196..db247962b9 100644
--- a/nscd/nscd_helper.c
+++ b/nscd/nscd_helper.c
@@ -21,6 +21,7 @@
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
+#include <stddef.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
@@ -472,18 +473,20 @@ __nscd_get_map_ref (request_type type, const char *name,
garbage collection. */
struct datahead *
__nscd_cache_search (request_type type, const char *key, size_t keylen,
- const struct mapped_database *mapped)
+ const struct mapped_database *mapped, size_t datalen)
{
unsigned long int hash = __nis_hash (key, keylen) % mapped->head->module;
size_t datasize = mapped->datasize;
ref_t trail = mapped->head->array[hash];
+ trail = atomic_forced_read (trail);
ref_t work = trail;
int tick = 0;
while (work != ENDREF && work + sizeof (struct hashentry) <= datasize)
{
struct hashentry *here = (struct hashentry *) (mapped->data + work);
+ ref_t here_key, here_packet;
#ifndef _STRING_ARCH_unaligned
/* Although during garbage collection when moving struct hashentry
@@ -498,13 +501,14 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
if (type == here->type
&& keylen == here->len
- && here->key + keylen <= datasize
- && memcmp (key, mapped->data + here->key, keylen) == 0
- && here->packet + sizeof (struct datahead) <= datasize)
+ && (here_key = atomic_forced_read (here->key)) + keylen <= datasize
+ && memcmp (key, mapped->data + here_key, keylen) == 0
+ && ((here_packet = atomic_forced_read (here->packet))
+ + sizeof (struct datahead) <= datasize))
{
/* We found the entry. Increment the appropriate counter. */
struct datahead *dh
- = (struct datahead *) (mapped->data + here->packet);
+ = (struct datahead *) (mapped->data + here_packet);
#ifndef _STRING_ARCH_unaligned
if ((uintptr_t) dh & (__alignof__ (*dh) - 1))
@@ -513,11 +517,14 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
/* See whether we must ignore the entry or whether something
is wrong because garbage collection is in progress. */
- if (dh->usable && here->packet + dh->allocsize <= datasize)
+ if (dh->usable
+ && here_packet + dh->allocsize <= datasize
+ && (here_packet + offsetof (struct datahead, data) + datalen
+ <= datasize))
return dh;
}
- work = here->next;
+ work = atomic_forced_read (here->next);
/* Prevent endless loops. This should never happen but perhaps
the database got corrupted, accidentally or deliberately. */
if (work == trail)
@@ -532,7 +539,11 @@ __nscd_cache_search (request_type type, const char *key, size_t keylen,
if ((uintptr_t) trailelem & (__alignof__ (*trailelem) - 1))
return NULL;
#endif
- trail = trailelem->next;
+
+ if (trail + sizeof (struct hashentry) > datasize)
+ return NULL;
+
+ trail = atomic_forced_read (trailelem->next);
}
tick = 1 - tick;
}
diff --git a/nscd/nscd_initgroups.c b/nscd/nscd_initgroups.c
index 866455a96c..5ff60c080c 100644
--- a/nscd/nscd_initgroups.c
+++ b/nscd/nscd_initgroups.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
@@ -55,7 +55,8 @@ __nscd_getgrouplist (const char *user, gid_t group, long int *size,
if (mapped != NO_MAPPING)
{
struct datahead *found = __nscd_cache_search (INITGROUPS, user,
- userlen, mapped);
+ userlen, mapped,
+ sizeof initgr_resp);
if (found != NULL)
{
respdata = (char *) (&found->data[0].initgrdata + 1);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 03:48:57 +0000