diff options
| author | Brian Norris <briannorris@chromium.org> | 2017-07-24 18:13:21 -0700 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2017-07-28 17:47:47 +0300 |
| commit | ce32d1d83702064e7746453622fc2d6bdcd8baa4 (patch) | |
| tree | 05cecd8052b6d54363b91b69e693f58089c3befc | |
| parent | 643acea6297f9aa7241cfb17d5b5606186f54137 (diff) | |
| download | linux-ce32d1d83702064e7746453622fc2d6bdcd8baa4.tar.bz2 | |
mwifiex: unregister wiphy before freeing resources
It's possible for some control interfaces (e.g., scans, set freq) to be
active after we've stopped our main work queue and the netif TX queues.
These don't get completely shut out until we've unregistered the wdevs
and wiphy.
So let's only free command buffers and poison our lists after
wiphy_unregister().
This resolves various use-after-free issues seen when resetting the
device.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/init.c | 3 | ||||
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/main.c | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/main.h | 1 |
3 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/init.c b/drivers/net/wireless/marvell/mwifiex/init.c index 3ecb59f7405b..de96675e43d5 100644 --- a/drivers/net/wireless/marvell/mwifiex/init.c +++ b/drivers/net/wireless/marvell/mwifiex/init.c @@ -418,7 +418,10 @@ mwifiex_adapter_cleanup(struct mwifiex_adapter *adapter) mwifiex_cancel_all_pending_cmd(adapter); wake_up_interruptible(&adapter->cmd_wait_q.wait); wake_up_interruptible(&adapter->hs_activate_wait_q); +} +void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter) +{ /* Free lock variables */ mwifiex_free_lock_list(adapter); diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c index 9c8f7bcfef8b..77e491720664 100644 --- a/drivers/net/wireless/marvell/mwifiex/main.c +++ b/drivers/net/wireless/marvell/mwifiex/main.c @@ -653,6 +653,7 @@ err_dnld_fw: if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { pr_debug("info: %s: shutdown mwifiex\n", __func__); mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(adapter); } init_failed = true; @@ -1404,11 +1405,13 @@ static void mwifiex_uninit_sw(struct mwifiex_adapter *adapter) mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev); rtnl_unlock(); } - vfree(adapter->chan_stats); wiphy_unregister(adapter->wiphy); wiphy_free(adapter->wiphy); adapter->wiphy = NULL; + + vfree(adapter->chan_stats); + mwifiex_free_cmd_buffers(adapter); } /* @@ -1515,6 +1518,7 @@ err_kmalloc: mwifiex_dbg(adapter, ERROR, "info: %s: shutdown mwifiex\n", __func__); mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(adapter); } complete_all(adapter->fw_done); @@ -1662,6 +1666,7 @@ err_registerdev: if (adapter->hw_status == MWIFIEX_HW_STATUS_READY) { pr_debug("info: %s: shutdown mwifiex\n", __func__); mwifiex_shutdown_drv(adapter); + mwifiex_free_cmd_buffers(adapter); } err_kmalloc: mwifiex_free_adapter(adapter); diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h index f8cf3079ac7d..62ce4e81f695 100644 --- a/drivers/net/wireless/marvell/mwifiex/main.h +++ b/drivers/net/wireless/marvell/mwifiex/main.h @@ -1078,6 +1078,7 @@ int mwifiex_get_debug_info(struct mwifiex_private *, int mwifiex_alloc_cmd_buffer(struct mwifiex_adapter *adapter); int mwifiex_free_cmd_buffer(struct mwifiex_adapter *adapter); +void mwifiex_free_cmd_buffers(struct mwifiex_adapter *adapter); void mwifiex_cancel_all_pending_cmd(struct mwifiex_adapter *adapter); void mwifiex_cancel_pending_ioctl(struct mwifiex_adapter *adapter); void mwifiex_cancel_pending_scan_cmd(struct mwifiex_adapter *adapter); |