From e8245ba93fe1d7d345d10ff9a189b6f5188682b1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Date: Fri, 15 Mar 2024 10:47:50 +0000 Subject: [PATCH 7/8] remote: check for negative array lengths before allocation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit While the C API entry points will validate non-negative lengths for various parameters, the RPC server de-serialization code will need to allocate memory for arrays before entering the C API. These allocations will thus happen before the non-negative length check is performed. Passing a negative length to the g_new0 function will usually result in a crash due to the negative length being treated as a huge positive number. This was found and diagnosed by ALT Linux Team with AFLplusplus. Reviewed-by: Michal Privoznik Found-by: Alexandr Shashkin Co-developed-by: Alexander Kuznetsov Signed-off-by: Daniel P. Berrangé --- src/remote/remote_daemon_dispatch.c | 65 +++++++++++++++++++++++++++++ src/rpc/gendispatch.pl | 5 +++ 2 files changed, 70 insertions(+) diff --git a/src/remote/remote_daemon_dispatch.c b/src/remote/remote_daemon_dispatch.c index c5506c2e11..5a1a317452 100644 --- a/src/remote/remote_daemon_dispatch.c +++ b/src/remote/remote_daemon_dispatch.c @@ -2307,6 +2307,10 @@ remoteDispatchDomainGetSchedulerParameters(virNetServerPtr server G_GNUC_UNUSED, if (!conn) goto cleanup; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_SCHEDULER_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -2355,6 +2359,10 @@ remoteDispatchDomainGetSchedulerParametersFlags(virNetServerPtr server G_GNUC_UN if (!conn) goto cleanup; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_SCHEDULER_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -2516,6 +2524,10 @@ remoteDispatchDomainBlockStatsFlags(virNetServerPtr server G_GNUC_UNUSED, goto cleanup; flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_BLOCK_STATS_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -2750,6 +2762,14 @@ remoteDispatchDomainGetVcpuPinInfo(virNetServerPtr server G_GNUC_UNUSED, if (!(dom = get_nonnull_domain(conn, args->dom))) goto cleanup; + if (args->ncpumaps < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("ncpumaps must be non-negative")); + goto cleanup; + } + if (args->maplen < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maplen must be non-negative")); + goto cleanup; + } if (args->ncpumaps > REMOTE_VCPUINFO_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("ncpumaps > REMOTE_VCPUINFO_MAX")); goto cleanup; @@ -2845,6 +2865,11 @@ remoteDispatchDomainGetEmulatorPinInfo(virNetServerPtr server G_GNUC_UNUSED, if (!(dom = get_nonnull_domain(conn, args->dom))) goto cleanup; + if (args->maplen < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maplen must be non-negative")); + goto cleanup; + } + /* Allocate buffers to take the results */ if (args->maplen > 0 && VIR_ALLOC_N(cpumaps, args->maplen) < 0) @@ -2893,6 +2918,14 @@ remoteDispatchDomainGetVcpus(virNetServerPtr server G_GNUC_UNUSED, if (!(dom = get_nonnull_domain(conn, args->dom))) goto cleanup; + if (args->maxinfo < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo must be non-negative")); + goto cleanup; + } + if (args->maplen < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo must be non-negative")); + goto cleanup; + } if (args->maxinfo > REMOTE_VCPUINFO_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("maxinfo > REMOTE_VCPUINFO_MAX")); goto cleanup; @@ -3140,6 +3173,10 @@ remoteDispatchDomainGetMemoryParameters(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_MEMORY_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -3200,6 +3237,10 @@ remoteDispatchDomainGetNumaParameters(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_NUMA_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -3260,6 +3301,10 @@ remoteDispatchDomainGetBlkioParameters(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_BLKIO_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -3321,6 +3366,10 @@ remoteDispatchNodeGetCPUStats(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_NODE_CPU_STATS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -3389,6 +3438,10 @@ remoteDispatchNodeGetMemoryStats(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_NODE_MEMORY_STATS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -3570,6 +3623,10 @@ remoteDispatchDomainGetBlockIoTune(virNetServerPtr server G_GNUC_UNUSED, if (!conn) goto cleanup; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_BLOCK_IO_TUNE_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -5128,6 +5185,10 @@ remoteDispatchDomainGetInterfaceParameters(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_DOMAIN_INTERFACE_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; @@ -5350,6 +5411,10 @@ remoteDispatchNodeGetMemoryParameters(virNetServerPtr server G_GNUC_UNUSED, flags = args->flags; + if (args->nparams < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams must be non-negative")); + goto cleanup; + } if (args->nparams > REMOTE_NODE_MEMORY_PARAMETERS_MAX) { virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("nparams too large")); goto cleanup; diff --git a/src/rpc/gendispatch.pl b/src/rpc/gendispatch.pl index 590a46ef66..02612f1856 100755 --- a/src/rpc/gendispatch.pl +++ b/src/rpc/gendispatch.pl @@ -1074,6 +1074,11 @@ elsif ($mode eq "server") { print "\n"; if ($single_ret_as_list) { + print " if (args->$single_ret_list_max_var < 0) {\n"; + print " virReportError(VIR_ERR_RPC,\n"; + print " \"%s\", _(\"max$single_ret_list_name must be non-negative\"));\n"; + print " goto cleanup;\n"; + print " }\n"; print " if (args->$single_ret_list_max_var > $single_ret_list_max_define) {\n"; print " virReportError(VIR_ERR_RPC,\n"; print " \"%s\", _(\"max$single_ret_list_name > $single_ret_list_max_define\"));\n"; -- 2.27.0