[Bug 1932209] Re: UAF on CAN J1939 j1939_can_recv

** Summary changed:

- placeholder bug
+ UAF on CAN J1939 j1939_can_recv

** Description changed:

- Another bug.
+ [Impact]
+ j1939_can_recv may run concurrently to can_rx_unregister on j1939_netdev_stop, which will, then, free the priv struct that is used by j1939_can_recv, leading to a system crash.
+
+ [Potential regression]
+ CAN J1939 sockets may stop working as expected.
+
+ [Test case]
+ A program that created multiple threads, binding to J1939 sockets and closing them, while sending RAW CAN sockets were run.

** Information type changed from Private to Public Security

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1932209

Title:
UAF on CAN J1939 j1939_can_recv

Status in linux package in Ubuntu:
Fix Released

Bug description:
[Impact]
j1939_can_recv may run concurrently to can_rx_unregister on j1939_netdev_stop, which will, then, free the priv struct that is used by j1939_can_recv, leading to a system crash.

[Potential regression]
CAN J1939 sockets may stop working as expected.

[Test case]
A program that created multiple threads, binding to J1939 sockets and closing them, while sending RAW CAN sockets were run.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1932209/+subscriptions