diff options
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/sta_ioctl.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c index 9460d5352b23..19196848778c 100644 --- a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c +++ b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c @@ -57,6 +57,18 @@ int mwifiex_wait_queue_complete(struct mwifiex_adapter *adapter, mwifiex_dbg(adapter, ERROR, "cmd_wait_q terminated: %d\n", status); mwifiex_cancel_all_pending_cmd(adapter); + + /* The command response path writes through cmd_node->data_buf. + * On an interrupted wait, the caller can return and release a + * stack-allocated data_buf before a late firmware response is + * processed. Detach the caller-owned buffer from the current + * command so a late response cannot corrupt freed stack memory. + */ + spin_lock_bh(&adapter->mwifiex_cmd_lock); + if (adapter->curr_cmd == cmd_queued) + adapter->curr_cmd->data_buf = NULL; + spin_unlock_bh(&adapter->mwifiex_cmd_lock); + return status; } |