msm: IPA: add the check on intf query
The ipa_ioc_query_intf_rx_props structure comes
from the ioctl handler, and it is verified that
the size of rx buffer does not exceed the
IPA_NUM_PROPS_MAX elements. It is also verified
that the "entry->rx" buffer does not exceed
IPA_NUM_PROPS_MAX when "entry" is allocated.
However, the sizes of the buffer "rx->rx" and
the buffer "entry->rx" are not guaranteed to
be the same and will lead memory corruption
issue. The fix is to add the check before
memcpy.
Change-Id: Idf5c2d32f47c1a1cffeaa5607193855188893ddb
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>
diff --git a/drivers/platform/msm/ipa/ipa_v3/ipa_intf.c b/drivers/platform/msm/ipa/ipa_v3/ipa_intf.c
index da965e7..16a5676 100644
--- a/drivers/platform/msm/ipa/ipa_v3/ipa_intf.c
+++ b/drivers/platform/msm/ipa/ipa_v3/ipa_intf.c
@@ -275,6 +275,14 @@
mutex_lock(&ipa3_ctx->lock);
list_for_each_entry(entry, &ipa3_ctx->intf_list, link) {
if (!strcmp(entry->name, tx->name)) {
+ /* add the entry check */
+ if (entry->num_tx_props != tx->num_tx_props) {
+ IPAERR("invalid entry number(%u %u)\n",
+ entry->num_tx_props,
+ tx->num_tx_props);
+ mutex_unlock(&ipa3_ctx->lock);
+ return result;
+ }
memcpy(tx->tx, entry->tx, entry->num_tx_props *
sizeof(struct ipa_ioc_tx_intf_prop));
result = 0;
@@ -314,6 +322,14 @@
mutex_lock(&ipa3_ctx->lock);
list_for_each_entry(entry, &ipa3_ctx->intf_list, link) {
if (!strcmp(entry->name, rx->name)) {
+ /* add the entry check */
+ if (entry->num_rx_props != rx->num_rx_props) {
+ IPAERR("invalid entry number(%u %u)\n",
+ entry->num_rx_props,
+ rx->num_rx_props);
+ mutex_unlock(&ipa3_ctx->lock);
+ return result;
+ }
memcpy(rx->rx, entry->rx, entry->num_rx_props *
sizeof(struct ipa_ioc_rx_intf_prop));
result = 0;
@@ -348,6 +364,14 @@
mutex_lock(&ipa3_ctx->lock);
list_for_each_entry(entry, &ipa3_ctx->intf_list, link) {
if (!strcmp(entry->name, ext->name)) {
+ /* add the entry check */
+ if (entry->num_ext_props != ext->num_ext_props) {
+ IPAERR("invalid entry number(%u %u)\n",
+ entry->num_ext_props,
+ ext->num_ext_props);
+ mutex_unlock(&ipa3_ctx->lock);
+ return result;
+ }
memcpy(ext->ext, entry->ext, entry->num_ext_props *
sizeof(struct ipa_ioc_ext_intf_prop));
result = 0;