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Add bounds checking on virConnectListAllDomains RPC call

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The return values for the virConnectListAllDomains call were not
bounds checked. This is a robustness issue for clients if
something where to cause corruption of the RPC stream data.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2013-08-19 14:23:31 +01:00
parent a43d4f543c
commit 9e97128ba5
3 changed files with 23 additions and 14 deletions
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7
daemon/remote.c
View File

@ -1050,6 +1050,13 @@ remoteDispatchConnectListAllDomains(virNetServerPtr server ATTRIBUTE_UNUSED,
args->flags)) < 0)
goto cleanup;
if (ndomains > REMOTE_DOMAIN_LIST_MAX) {
virReportError(VIR_ERR_RPC,
_("Too many domains '%d' for limit '%d'"),
ndomains, REMOTE_DOMAIN_LIST_MAX);
goto cleanup;
}
if (doms && ndomains) {
if (VIR_ALLOC_N(ret->domains.domains_val, ndomains) < 0)
goto cleanup;

15
src/remote/remote_driver.c
View File

@ -1370,10 +1370,10 @@ remoteConnectListDomains(virConnectPtr conn, int *ids, int maxids)
remoteDriverLock(priv);
if (maxids > REMOTE_DOMAIN_ID_LIST_MAX) {
if (maxids > REMOTE_DOMAIN_LIST_MAX) {
virReportError(VIR_ERR_RPC,
_("too many remote domain IDs: %d > %d"),
maxids, REMOTE_DOMAIN_ID_LIST_MAX);
_("Too many domains '%d' for limit '%d'"),
maxids, REMOTE_DOMAIN_LIST_MAX);
goto done;
}
args.maxids = maxids;
@ -1386,7 +1386,7 @@ remoteConnectListDomains(virConnectPtr conn, int *ids, int maxids)
if (ret.ids.ids_len > maxids) {
virReportError(VIR_ERR_RPC,
_("too many remote domain IDs: %d > %d"),
_("Too many domains '%d' for limit '%d'"),
ret.ids.ids_len, maxids);
goto cleanup;
}
@ -1433,6 +1433,13 @@ remoteConnectListAllDomains(virConnectPtr conn,
(char *) &ret) == -1)
goto done;
if (ret.domains.domains_len > REMOTE_DOMAIN_LIST_MAX) {
virReportError(VIR_ERR_RPC,
_("Too many domains '%d' for limit '%d'"),
ret.domains.domains_len, REMOTE_DOMAIN_LIST_MAX);
goto cleanup;
}
if (domains) {
if (VIR_ALLOC_N(doms, ret.domains.domains_len + 1) < 0)
goto cleanup;

15
src/remote/remote_protocol.x
View File

@ -73,13 +73,8 @@ typedef string remote_nonnull_string<REMOTE_STRING_MAX>;
/* A long string, which may be NULL. */
typedef remote_nonnull_string *remote_string;
/* This just places an upper limit on the length of lists of
* domain IDs which may be sent via the protocol.
*/
const REMOTE_DOMAIN_ID_LIST_MAX = 16384;
/* Upper limit on lists of domain names. */
const REMOTE_DOMAIN_NAME_LIST_MAX = 16384;
/* Upper limit on lists of domains. */
const REMOTE_DOMAIN_LIST_MAX = 16384;
/* Upper limit on cpumap (bytes) passed to virDomainPinVcpu. */
const REMOTE_CPUMAP_MAX = 2048;
@ -724,7 +719,7 @@ struct remote_connect_list_domains_args {
};
struct remote_connect_list_domains_ret {
int ids<REMOTE_DOMAIN_ID_LIST_MAX>; /* insert@1 */
int ids<REMOTE_DOMAIN_LIST_MAX>; /* insert@1 */
};
struct remote_connect_num_of_domains_ret {
@ -990,7 +985,7 @@ struct remote_connect_list_defined_domains_args {
};
struct remote_connect_list_defined_domains_ret {
remote_nonnull_string names<REMOTE_DOMAIN_NAME_LIST_MAX>; /* insert@1 */
remote_nonnull_string names<REMOTE_DOMAIN_LIST_MAX>; /* insert@1 */
};
struct remote_connect_num_of_defined_domains_ret {
@ -2665,7 +2660,7 @@ struct remote_connect_list_all_domains_args {
};
struct remote_connect_list_all_domains_ret {
remote_nonnull_domain domains<>;
remote_nonnull_domain domains<REMOTE_DOMAIN_LIST_MAX>;
unsigned int ret;
};