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[98.232.221.87]) by smtp.gmail.com with ESMTPSA id x7-20020a056638010700b0042b4b1246cbsm1273308jao.148.2023.09.15.13.24.48 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 13:24:49 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH] Bluetooth: hci_codec: Fix leaking content of local_codecs Date: Fri, 15 Sep 2023 13:24:47 -0700 Message-ID: <20230915202447.3521406-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz The following memory leak can be observed when the controller supports codecs which are stored in local_codecs list but the elements are never freed: unreferenced object 0xffff88800221d840 (size 32): comm "kworker/u3:0", pid 36, jiffies 4294898739 (age 127.060s) hex dump (first 32 bytes): f8 d3 02 03 80 88 ff ff 80 d8 21 02 80 88 ff ff ..........!..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] __kmalloc+0x47/0x120 [] hci_codec_list_add.isra.0+0x2d/0x160 [] hci_read_codec_capabilities+0x183/0x270 [] hci_read_supported_codecs+0x1bb/0x2d0 [] hci_read_local_codecs_sync+0x3e/0x60 [] hci_dev_open_sync+0x943/0x11e0 [] hci_power_on+0x10d/0x3f0 [] process_one_work+0x404/0x800 [] worker_thread+0x374/0x670 [] kthread+0x188/0x1c0 [] ret_from_fork+0x2b/0x50 [] ret_from_fork_asm+0x1a/0x30 Cc: stable@vger.kernel.org Fixes: 8961987f3f5f ("Bluetooth: Enumerate local supported codec and cache details") Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_core.c | 1 + net/bluetooth/hci_event.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index db4f28d68d71..91895bfb6b2d 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2784,6 +2784,7 @@ void hci_release_dev(struct hci_dev *hdev) hci_conn_params_clear_all(hdev); hci_discovery_filter_clear(hdev); hci_blocked_keys_clear(hdev); + hci_codec_list_clear(&hdev->local_codecs); hci_dev_unlock(hdev); ida_simple_remove(&hci_index_ida, hdev->id); diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index d532f4c139f9..ee2c418f8e06 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -33,6 +33,7 @@ #include "hci_request.h" #include "hci_debugfs.h" +#include "hci_codec.h" #include "a2mp.h" #include "amp.h" #include "smp.h" @@ -301,6 +302,7 @@ static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb) hci_bdaddr_list_clear(&hdev->le_accept_list); hci_bdaddr_list_clear(&hdev->le_resolv_list); + hci_codec_list_clear(&hdev->local_codecs); return rp->status; }