Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Fix queuing tx_work after workqueue is drained hci_send_acl(), hci_send_sco() and hci_send_iso() queue hdev->tx_work unconditionally. They can run from the L2CAP/SCO/ISO socket send path while hci_dev_close_sync() is draining hdev->workqueue (HCIDEVDOWN racing with a socket write). Since that queue_work() is not chained work from the tx_work worker itself, __queue_work() sees the queue marked __WQ_DRAINING, warns "cannot queue %ps on wq %s", and drops the work: WARNING: CPU: 1 PID: 5985 at kernel/workqueue.c:2352 __queue_work Call Trace: queue_work_on l2cap_chan_send l2cap_sock_sendmsg ... hci_dev_close_sync() already sets HCI_CMD_DRAIN_WORKQUEUE before draining, but only hci_cmd_work() and handle_cmd_cnt_and_timer() check it before queuing. Route the tx_work producers through the same guard via a shared hci_sched_tx() helper.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7b81c1378b79c3143ca3fdb3d18ac0f01cbabb21 before 8010212197d4a3ee714f78ed77048d0b712ff925; affected 9cebe4680bb9a72f80c6541eb24af06db7a1fbc9 before ab0678a0701ac4de499428dc1b321659bb74d272; affected 47330cc875b36a1cf7b3543cb2cf90a7c603ce0e before e220c1242a643d97102a79f09b7ef3aa31276961; affected 525daaea459fc215f432de1b8debbd9144bf97b0 before cbb325bc150e8c0dbce004ac0e5516bcffc0de31; affected 525daaea459fc215f432de1b8debbd9144bf97b0 before 6610c6fe4b8936c232048e6049bf77c70a6f759c; affected 60bceb9a4c693e68cc90ba4b2dfb9e000e8638ff; affected 6.12.93 before 6.12.112; affected 6.18.35 before 6.18.54; affected 7.0.12 before 7.1 |
| Linux / Linux | affected 7.1; unaffected 0 before 7.1; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8010212197d4a3ee714f78ed77048d0b712ff925
- https://git.kernel.org/stable/c/ab0678a0701ac4de499428dc1b321659bb74d272
- https://git.kernel.org/stable/c/e220c1242a643d97102a79f09b7ef3aa31276961
- https://git.kernel.org/stable/c/cbb325bc150e8c0dbce004ac0e5516bcffc0de31
- https://git.kernel.org/stable/c/6610c6fe4b8936c232048e6049bf77c70a6f759c