From: Luiz Augusto von Dentz luiz.von.dentz@intel.com
mainline inclusion from mainline-v6.11-rc1 commit 87be7b189b2c50d4b51512f59e4e97db4eedee8a category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAGEK1 CVE: CVE-2024-41062
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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__hci_cmd_sync_status shall only be used if hci_req_sync_lock is _not_ required which is not the case of hci_dev_cmd so it needs to use hci_cmd_sync_status which uses hci_req_sync_lock internally.
Fixes: f1a8f402f13f ("Bluetooth: L2CAP: Fix deadlock") Reported-by: Pauli Virtanen pav@iki.fi Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Zhengchao Shao shaozhengchao@huawei.com --- net/bluetooth/hci_core.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index bc41bfdfffbf..4984482c020c 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1987,8 +1987,8 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
switch (cmd) { case HCISETAUTH: - err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE, - 1, &dr.dev_opt, HCI_CMD_TIMEOUT); + err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE, + 1, &dr.dev_opt, HCI_CMD_TIMEOUT); break;
case HCISETENCRYPT: @@ -1999,23 +1999,21 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg)
if (!test_bit(HCI_AUTH, &hdev->flags)) { /* Auth must be enabled first */ - err = __hci_cmd_sync_status(hdev, - HCI_OP_WRITE_AUTH_ENABLE, - 1, &dr.dev_opt, - HCI_CMD_TIMEOUT); + err = hci_cmd_sync_status(hdev, + HCI_OP_WRITE_AUTH_ENABLE, + 1, &dr.dev_opt, + HCI_CMD_TIMEOUT); if (err) break; }
- err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE, - 1, &dr.dev_opt, - HCI_CMD_TIMEOUT); + err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE, + 1, &dr.dev_opt, HCI_CMD_TIMEOUT); break;
case HCISETSCAN: - err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE, - 1, &dr.dev_opt, - HCI_CMD_TIMEOUT); + err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE, + 1, &dr.dev_opt, HCI_CMD_TIMEOUT);
/* Ensure that the connectable and discoverable states * get correctly modified as this was a non-mgmt change. @@ -2027,9 +2025,8 @@ int hci_dev_cmd(unsigned int cmd, void __user *arg) case HCISETLINKPOL: policy = cpu_to_le16(dr.dev_opt);
- err = __hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, - 2, &policy, - HCI_CMD_TIMEOUT); + err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, + 2, &policy, HCI_CMD_TIMEOUT); break;
case HCISETLINKMODE: