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[34.78.140.88]) by smtp.gmail.com with ESMTPSA id 24sm20043967wmf.44.2020.10.26.08.09.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2020 08:09:42 -0700 (PDT) From: Aleksandr Nogikh To: davem@davemloft.net, kuba@kernel.org, johannes@sipsolutions.net Cc: edumazet@google.com, andreyknvl@google.com, dvyukov@google.com, elver@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, willemdebruijn.kernel@gmail.com, Aleksandr Nogikh Subject: [PATCH v3 3/3] mac80211: add KCOV remote annotations to incoming frame processing Date: Mon, 26 Oct 2020 15:08:51 +0000 Message-Id: <20201026150851.528148-4-aleksandrnogikh@gmail.com> X-Mailer: git-send-email 2.29.0.rc1.297.gfa9743e501-goog In-Reply-To: <20201026150851.528148-1-aleksandrnogikh@gmail.com> References: <20201026150851.528148-1-aleksandrnogikh@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Aleksandr Nogikh Add KCOV remote annotations to ieee80211_iface_work and ieee80211_rx. This will enable coverage-guided fuzzing of mac80211 code that processes incoming 802.11 frames. Signed-off-by: Aleksandr Nogikh --- v1 -> v2: * The commit now affects ieee80211_rx instead of ieee80211_tasklet_handler. --- include/net/mac80211.h | 2 ++ net/mac80211/iface.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index e8e295dae744..f4c37a1b381e 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -4499,7 +4499,9 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta, */ static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) { + kcov_remote_start_common(skb_get_kcov_handle(skb)); ieee80211_rx_napi(hw, NULL, skb, NULL); + kcov_remote_stop(); } /** diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 1be775979132..56a1bcea2c1c 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -1356,6 +1356,7 @@ static void ieee80211_iface_work(struct work_struct *work) while ((skb = skb_dequeue(&sdata->skb_queue))) { struct ieee80211_mgmt *mgmt = (void *)skb->data; + kcov_remote_start_common(skb_get_kcov_handle(skb)); if (ieee80211_is_action(mgmt->frame_control) && mgmt->u.action.category == WLAN_CATEGORY_BACK) { int len = skb->len; @@ -1465,6 +1466,7 @@ static void ieee80211_iface_work(struct work_struct *work) } kfree_skb(skb); + kcov_remote_stop(); } /* then other type-dependent work */