netdev - [PATCH v2] Bluetooth: hci_sync: fix memory leak in hci_update_adv

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230110064420.3409168-1-shaozhengchao@huawei.com>
Date:   Tue, 10 Jan 2023 14:44:20 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-bluetooth@...r.kernel.org>, <netdev@...r.kernel.org>,
        <marcel@...tmann.org>, <johan.hedberg@...il.com>,
        <luiz.dentz@...il.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC:     <brian.gix@...el.com>, <weiyongjun1@...wei.com>,
        <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH v2] Bluetooth: hci_sync: fix memory leak in hci_update_adv_data()

When hci_cmd_sync_queue() failed in hci_update_adv_data(), inst_ptr is
not freed, which will cause memory leak. ERR_PTR/PTR_ERR is used to
replace memory allocation to simplify code.

Fixes: 651cd3d65b0f ("Bluetooth: convert hci_update_adv_data to hci_sync")
Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
v2: Use ERR_PTR/PTR_ERR to replace memory allocation
---
 net/bluetooth/hci_sync.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 9e2d7e4b850c..8744bbecac9e 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -6187,20 +6187,14 @@ int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
 
 static int _update_adv_data_sync(struct hci_dev *hdev, void *data)
 {
-	u8 instance = *(u8 *)data;
-
-	kfree(data);
+	u8 instance = PTR_ERR(data);
 
 	return hci_update_adv_data_sync(hdev, instance);
 }
 
 int hci_update_adv_data(struct hci_dev *hdev, u8 instance)
 {
-	u8 *inst_ptr = kmalloc(1, GFP_KERNEL);
-
-	if (!inst_ptr)
-		return -ENOMEM;
+	u8 *inst_ptr = ERR_PTR(instance);
 
-	*inst_ptr = instance;
 	return hci_cmd_sync_queue(hdev, _update_adv_data_sync, inst_ptr, NULL);
 }
-- 
2.34.1