From: Johannes Berg <johannes.berg@xxxxxxxxx>
[ Upstream commit 13513cec93ac9902d0b896976d8bab3758a9881c ]
Check the firmware response size for responses to the
memory read/write command in debugfs before using it.
Fixes: 2b55f43f8e47 ("iwlwifi: mvm: Add mem debugfs entry")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230417113648.0d56fcaf68ee.I70e9571f3ed7263929b04f8fabad23c9b999e4ea@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 1ce9450e5add2..4071827d44757 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -1745,6 +1745,11 @@ static ssize_t iwl_dbgfs_mem_read(struct file *file, char __user *user_buf,
if (ret < 0)
return ret;
+ if (iwl_rx_packet_payload_len(hcmd.resp_pkt) < sizeof(*rsp)) {
+ ret = -EIO;
+ goto out;
+ }
+
rsp = (void *)hcmd.resp_pkt->data;
if (le32_to_cpu(rsp->status) != DEBUG_MEM_STATUS_SUCCESS) {
ret = -ENXIO;
@@ -1821,6 +1826,11 @@ static ssize_t iwl_dbgfs_mem_write(struct file *file,
if (ret < 0)
return ret;
+ if (iwl_rx_packet_payload_len(hcmd.resp_pkt) < sizeof(*rsp)) {
+ ret = -EIO;
+ goto out;
+ }
+
rsp = (void *)hcmd.resp_pkt->data;
if (rsp->status != DEBUG_MEM_STATUS_SUCCESS) {
ret = -ENXIO;
--
2.39.2
