Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f87271d21dd4ee83857ca11b94e7b4952749bbae to < f7f35a4f7fd574f5889bb2e4b397e14cbb83f6daaffectedab4eedb790cae44313759b50fe47da285e2519d5 to < 3f26ecbd9cde621dd94be7ef252c7210b965a5c7affectedab4eedb790cae44313759b50fe47da285e2519d5 to < d008460de352e534f6721de829b093368564ec66affectedab4eedb790cae44313759b50fe47da285e2519d5 to < 00fdebbbc557a2fc21321ff2eaa22fd70c078608affectedefc30877bd4bc85fefe98d80af60fafc86e5775eaffected18ab6b6078fa8191ca30a3065d57bf35d5635761affected6.12.20 to < 6.12.88affected6.6.84 to < 6.7affected6.13.8 to < 6.14affected
Linux Linux
Default version status: affected
6.14affected0 to < 6.14unaffected6.12.88 to ≤ 6.12.*unaffected6.18.21 to ≤ 6.18.*unaffected6.19.11 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected