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autofs/autofs-5.0.4-code-analysis-corrections.patch
Ian Kent c5187b0dbf - fix hosts map use after free. 
- fix uri list locking (again).
- check for stale SASL credentials upon connect fail.
- add "forcestart" and "forcerestart" init script options to allow use of
    5.0.3 strartup behavior if required.
- always read entire file map into cache to speed lookups.
- make MAX_ERR_BUF and PARSE_MAX_BUF use easier to audit.
- make some easy alloca replacements.
- update to configure libtirpc if present.
- update to provide ipv6 name and address support.
- update to provide ipv6 address parsing.
2009-02-16 04:01:39 +00:00

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autofs-5.0.4 - code analysis corrections
From: Ian Kent <raven@themaw.net>
Several mistakes have been reported by Paul Wankadia <junyer@google.com>:
- a malloc(3) allocation return was not being checked in make_fullpath().
- a double free and a use after free was identified in lookup_prune_cache().
- off-by-one buffer overflow in lib/macros.c:macro_parse_globalvar().
- several potential buffer overflows in modules/parse_hesiod.c.
- double free in daemon/indirect.c:do_mount_autofs_indirect().
- bogus struct name used for sizeof in lib/cache.c:cache_init() and
lib/cache.c:cache_init_null_cache().
- in daemon/direct.c:handle_packet_expire_direct master_unlock_mutex() not
needed and mutexes not unlocked for file descriptor fail case.
- in modules/lookup_multi.c:lookup_init() struct module_info array not
checked before free for allocation failure case.
- in modules/lookup_program.c:lookup_mount() mapent not freed on cache update failure.
- in modules/mount_nfs.c allocation of mount location not checked.
- in modules/parse_sun.c:parse_mapent() mount location not freed on syntax error.
- in modules/parse_sun.c:parse_mount() mount location not freed on syntax error.
- in modules/parse_sun.c:parse_init() a malloc is not checked and the
handling of the fail case is poor.
- in lib/mounts.c:tree_make_mnt_tree() variable ent is not freed on ent->path
alloc fail.
- in modules/replicated.c:add_host() NULL pointer dereference.
- add missing pthread_attr_destroy() in lib/alarm.c:alarm_start_handler().
- add missing pthread_attr_destroy() in daemon/state.c:st_start_handler().
- add missing fclose() in lib/defaults.c:*defaults_get_searchdns().
- add missing close()es in modules/mount_changer.c:swapCD().
---
daemon/direct.c | 6 ++-
daemon/indirect.c | 3 +-
daemon/lookup.c | 20 +++++-------
daemon/state.c | 6 ++-
lib/alarm.c | 6 ++-
lib/cache.c | 4 +-
lib/defaults.c | 1 +
lib/macros.c | 2 +
lib/mounts.c | 5 ++-
modules/lookup_multi.c | 15 +++++----
modules/lookup_program.c | 4 ++
modules/mount_changer.c | 2 +
modules/mount_nfs.c | 5 +++
modules/parse_hesiod.c | 79 ++++++++++++++++++++++++++++++++++++++++------
modules/parse_sun.c | 18 ++++++----
modules/replicated.c | 2 +
16 files changed, 123 insertions(+), 55 deletions(-)
diff --git a/daemon/direct.c b/daemon/direct.c
index 2d979f1..fc3c969 100644
--- a/daemon/direct.c
+++ b/daemon/direct.c
@@ -1088,7 +1088,6 @@ int handle_packet_expire_direct(struct autofs_point *ap, autofs_packet_expire_di
crit(ap->logopt, "can't find map entry for (%lu,%lu)",
(unsigned long) pkt->dev, (unsigned long) pkt->ino);
master_source_unlock(ap->entry);
- master_mutex_unlock();
pthread_setcancelstate(state, NULL);
return 1;
}
@@ -1098,8 +1097,9 @@ int handle_packet_expire_direct(struct autofs_point *ap, autofs_packet_expire_di
int ioctlfd;
ops->open(ap->logopt, &ioctlfd, me->dev, me->key);
if (ioctlfd == -1) {
- crit(ap->logopt, "can't open ioctlfd for %s",
- me->key);
+ crit(ap->logopt, "can't open ioctlfd for %s", me->key);
+ cache_unlock(mc);
+ master_source_unlock(ap->entry);
pthread_setcancelstate(state, NULL);
return 1;
}
diff --git a/daemon/indirect.c b/daemon/indirect.c
index 2ccbc53..f40c393 100644
--- a/daemon/indirect.c
+++ b/daemon/indirect.c
@@ -159,6 +159,7 @@ static int do_mount_autofs_indirect(struct autofs_point *ap, const char *root)
}
free(options);
+ options = NULL;
ret = stat(root, &st);
if (ret == -1) {
@@ -167,8 +168,6 @@ static int do_mount_autofs_indirect(struct autofs_point *ap, const char *root)
goto out_umount;
}
- options = NULL;
-
if (ops->open(ap->logopt, &ap->ioctlfd, st.st_dev, root)) {
crit(ap->logopt,
"failed to create ioctl fd for autofs path %s", ap->path);
diff --git a/daemon/lookup.c b/daemon/lookup.c
index e034348..fd2ce55 100644
--- a/daemon/lookup.c
+++ b/daemon/lookup.c
@@ -1001,12 +1001,16 @@ static char *make_fullpath(const char *root, const char *key)
if (l > KEY_MAX_LEN)
return NULL;
path = malloc(l);
+ if (!path)
+ return NULL;
strcpy(path, key);
} else {
l = strlen(key) + 1 + strlen(root) + 1;
if (l > KEY_MAX_LEN)
return NULL;
path = malloc(l);
+ if (!path)
+ return NULL;
sprintf(path, "%s/%s", root, key);
}
return path;
@@ -1076,10 +1080,6 @@ int lookup_prune_cache(struct autofs_point *ap, time_t age)
this = cache_lookup_distinct(mc, key);
if (!this) {
cache_unlock(mc);
- free(key);
- if (next_key)
- free(next_key);
- free(path);
goto next;
}
@@ -1097,18 +1097,14 @@ int lookup_prune_cache(struct autofs_point *ap, time_t age)
}
cache_unlock(mc);
- if (!next_key) {
- free(key);
- free(path);
- cache_readlock(mc);
- continue;
- }
next:
cache_readlock(mc);
- me = cache_lookup_distinct(mc, next_key);
+ if (next_key) {
+ me = cache_lookup_distinct(mc, next_key);
+ free(next_key);
+ }
free(key);
free(path);
- free(next_key);
}
pthread_cleanup_pop(1);
map->stale = 0;
diff --git a/daemon/state.c b/daemon/state.c
index cd63be1..606743b 100644
--- a/daemon/state.c
+++ b/daemon/state.c
@@ -1140,9 +1140,9 @@ int st_start_handler(void)
}
status = pthread_create(&thid, pattrs, st_queue_handler, NULL);
- if (status)
- return 0;
- return 1;
+ pthread_attr_destroy(pattrs);
+
+ return !status;
}
diff --git a/lib/alarm.c b/lib/alarm.c
index 1e32291..46df38a 100755
--- a/lib/alarm.c
+++ b/lib/alarm.c
@@ -238,9 +238,9 @@ int alarm_start_handler(void)
}
status = pthread_create(&thid, pattrs, alarm_handler, NULL);
- if (status)
- return 0;
- return 1;
+ pthread_attr_destroy(pattrs);
+
+ return !status;
}
diff --git a/lib/cache.c b/lib/cache.c
index edb3192..4cb4582 100644
--- a/lib/cache.c
+++ b/lib/cache.c
@@ -192,7 +192,7 @@ struct mapent_cache *cache_init(struct autofs_point *ap, struct map_source *map)
mc->size = defaults_get_map_hash_table_size();
- mc->hash = malloc(mc->size * sizeof(struct entry *));
+ mc->hash = malloc(mc->size * sizeof(struct mapent *));
if (!mc->hash) {
free(mc);
return NULL;
@@ -243,7 +243,7 @@ struct mapent_cache *cache_init_null_cache(struct master *master)
mc->size = NULL_MAP_HASHSIZE;
- mc->hash = malloc(mc->size * sizeof(struct entry *));
+ mc->hash = malloc(mc->size * sizeof(struct mapent *));
if (!mc->hash) {
free(mc);
return NULL;
diff --git a/lib/defaults.c b/lib/defaults.c
index 0d39716..e507a59 100644
--- a/lib/defaults.c
+++ b/lib/defaults.c
@@ -565,6 +565,7 @@ struct ldap_searchdn *defaults_get_searchdns(void)
if (!new) {
defaults_free_searchdns(sdn);
+ fclose(f);
return NULL;
}
diff --git a/lib/macros.c b/lib/macros.c
index 85f9cd3..32b70bf 100644
--- a/lib/macros.c
+++ b/lib/macros.c
@@ -165,7 +165,7 @@ int macro_parse_globalvar(const char *define)
char buf[MAX_MACRO_STRING];
char *pbuf, *value;
- if (strlen(define) > MAX_MACRO_STRING)
+ if (strlen(define) >= MAX_MACRO_STRING)
return 0;
strcpy(buf, define);
diff --git a/lib/mounts.c b/lib/mounts.c
index b98e1a4..08ca4e3 100644
--- a/lib/mounts.c
+++ b/lib/mounts.c
@@ -257,10 +257,10 @@ struct mnt_list *get_mnt_list(const char *table, const char *path, int include)
if (mptr == list)
list = ent;
+ else
+ last->next = ent;
ent->next = mptr;
- if (last)
- last->next = ent;
ent->path = malloc(len + 1);
if (!ent->path) {
@@ -705,6 +705,7 @@ struct mnt_list *tree_make_mnt_tree(const char *table, const char *path)
ent->path = malloc(len + 1);
if (!ent->path) {
endmntent(tab);
+ free(ent);
tree_free_mnt_tree(tree);
return NULL;
}
diff --git a/modules/lookup_multi.c b/modules/lookup_multi.c
index 1bf2e0a..6ec8434 100644
--- a/modules/lookup_multi.c
+++ b/modules/lookup_multi.c
@@ -212,14 +212,15 @@ nomem:
logerr(MODPREFIX "error: %s", estr);
error_out:
if (ctxt) {
- for (i = 0; i < ctxt->n; i++) {
- if (ctxt->m[i].mod)
- close_lookup(ctxt->m[i].mod);
- if (ctxt->m[i].argv)
- free_argv(ctxt->m[i].argc, ctxt->m[i].argv);
- }
- if (ctxt->m)
+ if (ctxt->m) {
+ for (i = 0; i < ctxt->n; i++) {
+ if (ctxt->m[i].mod)
+ close_lookup(ctxt->m[i].mod);
+ if (ctxt->m[i].argv)
+ free_argv(ctxt->m[i].argc, ctxt->m[i].argv);
+ }
free(ctxt->m);
+ }
if (ctxt->argl)
free(ctxt->argl);
free(ctxt);
diff --git a/modules/lookup_program.c b/modules/lookup_program.c
index 9878936..5b295a5 100644
--- a/modules/lookup_program.c
+++ b/modules/lookup_program.c
@@ -396,8 +396,10 @@ next:
cache_writelock(mc);
ret = cache_update(mc, source, name, mapent, time(NULL));
cache_unlock(mc);
- if (ret == CHE_FAIL)
+ if (ret == CHE_FAIL) {
+ free(mapent);
return NSS_STATUS_UNAVAIL;
+ }
debug(ap->logopt, MODPREFIX "%s -> %s", name, mapent);
diff --git a/modules/mount_changer.c b/modules/mount_changer.c
index 92bb72b..c30190d 100644
--- a/modules/mount_changer.c
+++ b/modules/mount_changer.c
@@ -162,6 +162,7 @@ int swapCD(const char *device, const char *slotName)
logerr(MODPREFIX
"Device %s is not an ATAPI compliant CD changer.",
device);
+ close(fd);
return 1;
}
@@ -169,6 +170,7 @@ int swapCD(const char *device, const char *slotName)
slot = ioctl(fd, CDROM_SELECT_DISC, slot);
if (slot < 0) {
logerr(MODPREFIX "CDROM_SELECT_DISC failed");
+ close(fd);
return 1;
}
diff --git a/modules/mount_nfs.c b/modules/mount_nfs.c
index 20732f8..6f54f47 100644
--- a/modules/mount_nfs.c
+++ b/modules/mount_nfs.c
@@ -221,6 +221,11 @@ int mount_mount(struct autofs_point *ap, const char *root, const char *name, int
/* Not a local host - do an NFS mount */
loc = malloc(strlen(this->name) + 1 + strlen(this->path) + 1);
+ if (!loc) {
+ char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
+ error(ap->logopt, "malloc: %s", estr);
+ return 1;
+ }
strcpy(loc, this->name);
strcat(loc, ":");
strcat(loc, this->path);
diff --git a/modules/parse_hesiod.c b/modules/parse_hesiod.c
index d5bb0f4..7a6a57d 100644
--- a/modules/parse_hesiod.c
+++ b/modules/parse_hesiod.c
@@ -46,6 +46,12 @@ static int parse_afs(struct autofs_point *ap,
/* Isolate the source for this AFS fs. */
for (i = 0; (!isspace(p[i]) && i < source_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for AFS "
+ "source: %s", p);
+ return 1;
+ }
source[i] = p[i];
}
@@ -56,8 +62,14 @@ static int parse_afs(struct autofs_point *ap,
while ((*p) && (isspace(*p)))
p++;
- /* Isolate the source for this AFS fs. */
+ /* Isolate the options for this AFS fs. */
for (i = 0; (!isspace(p[i]) && i < options_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for AFS "
+ "options: %s", p);
+ return 1;
+ }
options[i] = p[i];
}
options[i] = 0;
@@ -106,6 +118,12 @@ static int parse_nfs(struct autofs_point *ap,
/* Isolate the remote mountpoint for this NFS fs. */
for (i = 0; (!isspace(p[i]) && i < (int) sizeof(mount)); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for NFS "
+ "mountpoint: %s", p);
+ return 1;
+ }
mount[i] = p[i];
}
@@ -118,15 +136,26 @@ static int parse_nfs(struct autofs_point *ap,
/* Isolate the remote host. */
for (i = 0; (!isspace(p[i]) && i < source_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for NFS "
+ "host: %s", p);
+ return 1;
+ }
source[i] = p[i];
}
source[i] = 0;
p += i;
+ if (strlen(source) + strlen(mount) + 2 > source_len) {
+ error(ap->logopt, MODPREFIX "entry too log for mount source");
+ return 1;
+ }
+
/* Append ":mountpoint" to the source to get "host:mountpoint". */
- strncat(source, ":", source_len);
- strncat(source, mount, source_len);
+ strcat(source, ":");
+ strcat(source, mount);
/* Skip whitespace. */
while ((*p) && (isspace(*p)))
@@ -134,6 +163,12 @@ static int parse_nfs(struct autofs_point *ap,
/* Isolate the mount options. */
for (i = 0; (!isspace(p[i]) && i < options_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for NFS "
+ "mount options: %s", p);
+ return 1;
+ }
options[i] = p[i];
}
options[i] = 0;
@@ -178,6 +213,12 @@ static int parse_generic(struct autofs_point *ap,
/* Isolate the source for this fs. */
for (i = 0; (!isspace(p[i]) && i < source_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for generic "
+ "mount source: %s", p);
+ return 1;
+ }
source[i] = p[i];
}
@@ -190,6 +231,12 @@ static int parse_generic(struct autofs_point *ap,
/* Isolate the mount options. */
for (i = 0; (!isspace(p[i]) && i < options_len); i++) {
+ if (!p[i]) {
+ error(ap->logopt, MODPREFIX
+ "unexpeced end of input looking for generic "
+ "mount options: %s", p);
+ return 1;
+ }
options[i] = p[i];
}
options[i] = 0;
@@ -227,6 +274,7 @@ int parse_mount(struct autofs_point *ap, const char *name,
char options[HESIOD_LEN + 1];
char *q;
const char *p;
+ int ret;
ap->entry->current = NULL;
master_source_current_signal(ap->entry);
@@ -250,19 +298,28 @@ int parse_mount(struct autofs_point *ap, const char *name,
return 1;
/* If it's an AFS fs... */
} else if (!strcasecmp(fstype, "afs"))
- parse_afs(ap, mapent, name, name_len,
- source, sizeof(source), options, sizeof(options));
+ ret = parse_afs(ap, mapent, name, name_len,
+ source, sizeof(source), options,
+ sizeof(options));
/* If it's NFS... */
else if (!strcasecmp(fstype, "nfs"))
- parse_nfs(ap, mapent, name, name_len,
- source, sizeof(source), options, sizeof(options));
+ ret = parse_nfs(ap, mapent, name, name_len,
+ source, sizeof(source), options,
+ sizeof(options));
/* Punt. */
else
- parse_generic(ap, mapent, name, name_len, source, sizeof(source),
- options, sizeof(options));
+ ret = parse_generic(ap, mapent, name, name_len,
+ source, sizeof(source), options,
+ sizeof(options));
- debug(ap->logopt,
- MODPREFIX "mount %s is type %s from %s", name, fstype, source);
+ if (ret) {
+ error(ap->logopt, MODPREFIX "failed to parse entry");
+ return 1;
+ } else {
+ debug(ap->logopt,
+ MODPREFIX "mount %s is type %s from %s",
+ name, fstype, source);
+ }
return do_mount(ap, ap->path, name, name_len, source, fstype, options);
}
diff --git a/modules/parse_sun.c b/modules/parse_sun.c
index 72e51e2..ed73e46 100644
--- a/modules/parse_sun.c
+++ b/modules/parse_sun.c
@@ -379,15 +379,17 @@ int parse_init(int argc, const char *const *argv, void **context)
if (ctxt->optstr) {
noptstr =
(char *) realloc(ctxt->optstr, optlen + len + 2);
- if (!noptstr)
- break;
- noptstr[optlen] = ',';
- strcpy(noptstr + optlen + 1, argv[i] + offset);
- optlen += len + 1;
+ if (noptstr) {
+ noptstr[optlen] = ',';
+ strcpy(noptstr + optlen + 1, argv[i] + offset);
+ optlen += len + 1;
+ }
} else {
noptstr = (char *) malloc(len + 1);
- strcpy(noptstr, argv[i] + offset);
- optlen = len;
+ if (noptstr) {
+ strcpy(noptstr, argv[i] + offset);
+ optlen = len;
+ }
}
if (!noptstr) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
@@ -895,6 +897,7 @@ static int parse_mapent(const char *ent, char *g_options, char **options, char *
if (*p == '/') {
warn(logopt, MODPREFIX "error location begins with \"/\"");
free(myoptions);
+ free(loc);
return 0;
}
@@ -1636,6 +1639,7 @@ int parse_mount(struct autofs_point *ap, const char *name,
/* Location can't begin with a '/' */
if (*p == '/') {
free(options);
+ free(loc);
warn(ap->logopt,
MODPREFIX "error location begins with \"/\"");
return 1;
diff --git a/modules/replicated.c b/modules/replicated.c
index 63829a2..835af97 100644
--- a/modules/replicated.c
+++ b/modules/replicated.c
@@ -304,7 +304,7 @@ static int add_host(struct host **list, struct host *host)
{
struct host *this, *last;
- if (!list) {
+ if (!*list) {
*list = host;
return 1;
}
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