Re: [PATCH] iwlwifi: mvm: protect RCU dereference in iwl_mvm_get_key_sta_id

From: Laura Abbott
Date: Fri Dec 11 2015 - 17:21:27 EST

On 12/11/2015 12:13 AM, Johannes Berg wrote:
From: Johannes Berg <johannes.berg@xxxxxxxxx>

Properly protect the RCU dereference in iwl_mvm_get_key_sta_id() when
coming from iwl_mvm_update_tkip_key() which cannot hold the mvm->mutex
by moving the call into the RCU critical section.
Modify the check to use rcu_dereference_check() to permit this.

Fixes: 9513c5e18a0d ("iwlwifi: mvm: Avoid dereferencing sta if it was already flushed")
Reported-by: Laura Abbott <labbott@xxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>

Thanks, it's working for me.

Tested-by: Laura Abbott <labbott@xxxxxxxxxx>

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at