In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled<\/p>\n
HCI_UART_SENDING bit in tx_state means write_work is pending and blocks
\nqueueing it again. Currently this bit is not cleared when canceling the
\nwork in hci_uart_close(), which blocks future writes when device is
\nreopened later if write_work was pending.<\/p>\n
Fix by clearing HCI_UART_SENDING when canceling the work.<\/p>\n
Also make clearing of tx_skb safe by using disable_work_sync +
\nenable_work instead of just cancel_work_sync. hci_uart_flush() purges
\nthe proto tx queue so we can cancel the pending write_work there,
\ninstead of doing it just in hci_uart_close(). Re-enable and possibly
\nrequeue the work after queue flush.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: hci_uart: clear HCI_UART_SENDING when write_work is canceled<\/p>\n
HCI_UART_SENDING bit in tx_state means write_work is pendi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5316","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}