linux-kernel - Re: [syzbot] [bluetooth?] [usb?] memory leak in __hci_cmd_sync

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 for Android: free password hash cracker in your pocket

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

Message-ID: <tencent_7E3DD5361C969236B24BE0740F77E1662809@qq.com>
Date: Tue, 18 Nov 2025 11:56:11 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+f098d64cc684b8dbaf65@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] [usb?] memory leak in __hci_cmd_sync_sk

#syz test

diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index 6e76798ec786..b04bd6e357e0 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -180,6 +180,7 @@ struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
 	if (err == -ERESTARTSYS)
 		return ERR_PTR(-EINTR);
 
+	printk("err: %d, status: %u, result: %u, %s\n", err, hdev->req_status, hdev->req_result, __func__);
 	switch (hdev->req_status) {
 	case HCI_REQ_DONE:
 		err = -bt_to_errno(hdev->req_result);
@@ -201,8 +202,10 @@ struct sk_buff *__hci_cmd_sync_sk(struct hci_dev *hdev, u16 opcode, u32 plen,
 
 	bt_dev_dbg(hdev, "end: err %d", err);
 
-	if (err < 0) {
+	if (err <= 0) {
 		kfree_skb(skb);
+		if (!err)
+			err = -ETIMEDOUT;
 		return ERR_PTR(err);
 	}