[libvirt] [PATCH 06/12] Add bounds checking on virStoragePoolListAllVolumes RPC call

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; The return values for the virStoragePoolListAllVolumes 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(a)redhat.com&gt; --- daemon/remote.c | 7 +++++++ src/remote/remote_driver.c | 7 +++++++ src/remote/remote_protocol.x | 8 ++++---- 3 files changed, 18 insertions(+), 4 deletions(-) diff --git a/daemon/remote.c b/daemon/remote.c index 42c1c47..512170b 100644 --- a/daemon/remote.c +++ b/daemon/remote.c @@ -4136,6 +4136,13 @@ remoteDispatchStoragePoolListAllVolumes(virNetServerPtr server ATTRIBUTE_UNUSED, args->flags)) < 0) goto cleanup; + if (nvols > REMOTE_STORAGE_VOL_LIST_MAX) { + virReportError(VIR_ERR_RPC, + _("Too many storage volumes '%d' for limit '%d'"), + nvols, REMOTE_STORAGE_VOL_LIST_MAX); + goto cleanup; + } + if (vols && nvols) { if (VIR_ALLOC_N(ret->vols.vols_val, nvols) < 0) goto cleanup; diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c index 622647b..542cb39 100644 --- a/src/remote/remote_driver.c +++ b/src/remote/remote_driver.c @@ -3343,6 +3343,13 @@ remoteStoragePoolListAllVolumes(virStoragePoolPtr pool, (char *) &ret) == -1) goto done; + if (ret.vols.vols_len > REMOTE_STORAGE_VOL_LIST_MAX) { + virReportError(VIR_ERR_RPC, + _("Too many storage volumes '%d' for limit '%d'"), + ret.vols.vols_len, REMOTE_STORAGE_VOL_LIST_MAX); + goto cleanup; + } + if (vols) { if (VIR_ALLOC_N(tmp_vols, ret.vols.vols_len + 1) < 0) goto cleanup; diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x index 6e996b4..2034aa1 100644 --- a/src/remote/remote_protocol.x +++ b/src/remote/remote_protocol.x @@ -100,8 +100,8 @@ const REMOTE_DEFINED_INTERFACE_NAME_LIST_MAX = 16384; /* Upper limit on lists of storage pools. */ const REMOTE_STORAGE_POOL_LIST_MAX = 4096; -/* Upper limit on lists of storage vol names. */ -const REMOTE_STORAGE_VOL_NAME_LIST_MAX = 16384; +/* Upper limit on lists of storage vols. */ +const REMOTE_STORAGE_VOL_LIST_MAX = 16384; /* Upper limit on lists of node device names. */ const REMOTE_NODE_DEVICE_NAME_LIST_MAX = 16384; @@ -1746,7 +1746,7 @@ struct remote_storage_pool_list_volumes_args { }; struct remote_storage_pool_list_volumes_ret { - remote_nonnull_string names<REMOTE_STORAGE_VOL_NAME_LIST_MAX>; /* insert@1 */ + remote_nonnull_string names<REMOTE_STORAGE_VOL_LIST_MAX>; /* insert@1 */ }; @@ -2681,7 +2681,7 @@ struct remote_storage_pool_list_all_volumes_args { }; struct remote_storage_pool_list_all_volumes_ret { - remote_nonnull_storage_vol vols<>; + remote_nonnull_storage_vol vols<REMOTE_STORAGE_VOL_LIST_MAX>; unsigned int ret; }; -- 1.8.3.1