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Subject[PATCH 4.3 069/125] mwifiex: fix NULL pointer dereference during hidden SSID scan
4.3-stable review patch.  If anyone has any objections, please let me know.


From: Aniket Nagarnaik <>

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 <>
Signed-off-by: Amitkumar Karwar <>
Signed-off-by: Kalle Valo <>
Signed-off-by: Greg Kroah-Hartman <>

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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