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mwifiex: fix NULL pointer dereference during hidden SSID scan

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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..)
Cc: <stable@vger.kernel.org> [v4.2+]
Signed-off-by: Aniket Nagarnaik <aniketn@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Aniket Nagarnaik 2015-09-18 06:32:09 -07:00 committed by Kalle Valo
parent 2c3da96126
commit 17e524b1b6
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/mwifiex/scan.c
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@ -1893,7 +1893,7 @@ mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv)
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;
}