From: Eliad Peller Date: Tue, 14 Apr 2015 08:36:23 +0000 (+0300) Subject: iwlwifi: mvm: avoid use-after-free on iwl_mvm_d0i3_enable_tx() [BUGFIX] X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e5629be7c9984c8427f36bc01c2c35fb4a21d26b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git iwlwifi: mvm: avoid use-after-free on iwl_mvm_d0i3_enable_tx() [BUGFIX] qos_seq points (to a struct) inside the command response data. Make sure to free the response only after qos_seq is not needed anymore. type=bugfix bug=not-tracked fixes=I78c07110b59dcd389207bd2b168b0a2760839fe0 Change-Id: I619ce2c17e064dc98c7be9abc1e23175fdc8fb9a Reported-by: Heng Luo Signed-off-by: Eliad Peller Reviewed-on: https://gerrit.rds.intel.com/r/55381 Reviewed-by: Emmanuel Grumbach Tested-by: IWL Jenkins Signed-off-by: Emmanuel Grumbach --- diff --git a/drivers/net/wireless/iwlwifi/mvm/ops.c b/drivers/net/wireless/iwlwifi/mvm/ops.c index 1c66297d82c0..2ea01238754e 100644 --- a/drivers/net/wireless/iwlwifi/mvm/ops.c +++ b/drivers/net/wireless/iwlwifi/mvm/ops.c @@ -1263,11 +1263,13 @@ static void iwl_mvm_d0i3_exit_work(struct work_struct *wk) ieee80211_iterate_active_interfaces( mvm->hw, IEEE80211_IFACE_ITER_NORMAL, iwl_mvm_d0i3_disconnect_iter, mvm); - - iwl_free_resp(&get_status_cmd); out: iwl_mvm_d0i3_enable_tx(mvm, qos_seq); + /* qos_seq might point inside resp_pkt, so free it only now */ + if (get_status_cmd.resp_pkt) + iwl_free_resp(&get_status_cmd); + /* the FW might have updated the regdomain */ iwl_mvm_update_changed_regdom(mvm);