4.3-stable review patch. If anyone has any objections, please let me know.
------------------
From: Aniket Nagarnaik <aniketn@xxxxxxxxxxx>
commit 17e524b1b60f4390d24a51d9524d1648cf5d1447 upstream.
This NULL pointer dereference is observed during suspend resume
stress test. All pending commands are cancelled when system goes
into suspend state. There a corner case in which host may receive
response for last scan command after this and try to trigger extra
active scan for hidden SSIDs.
The issue is fixed by adding a NULL check to skip that extra scan.
Fixes: 2375fa2b36feaf34 (mwifiex: fix unable to connect hidden SSID..)
Signed-off-by: Aniket Nagarnaik <aniketn@xxxxxxxxxxx>
Signed-off-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/mwifiex/scan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -1889,7 +1889,7 @@ mwifiex_active_scan_req_for_passive_chan
u8 id = 0;
struct mwifiex_user_scan_cfg *user_scan_cfg;
- if (adapter->active_scan_triggered) {
+ if (adapter->active_scan_triggered || !priv->scan_request) {
adapter->active_scan_triggered = false;
return 0;
}
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