** Description changed: + SRU Justification: + + Impact: Removing the iwl3945 module can cause a hard lockup of the + system as there is a race condition which might get the rfkill_poll + workqueue restarted/running after the module code has been unloaded. + + Fix: Two patches from upstream, the first moving the call that restarts + the workqueue on the way down to be executed before stopping the + workqueue. The second patch makes the call stopping the workqueue wait + for any running worker. + + Testcase: Removing and loading the module in a loop (has been verified + to be working after the patches being applied). + + --- + I can reliably reproduce a total system lock-up (no response to SysReq keys) when-ever the module is removed. It occurs about 3 seconds after the removal has completed whilst the notification of removal is still on-screen. sudo modprobe -r iwl3945 sudo modprobe iwl3945 uname -a Linux hephaestion 2.6.28-11-generic #35-Ubuntu SMP Wed Mar 18 21:55:34 UTC 2009 x86_64 GNU/Linux lspci -nn | grep -i Wireless 06:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (rev 02) Because the lock-up is total the log files aren't synced and therefore the last 5 seconds or so of messages are not in the logs to help diagnose it. Tomorrow I shall use a netconsole connection to try to get more information.
** Tags removed: upstream-pending -- modprobe -r iwl3945 causes total system freeze https://bugs.launchpad.net/bugs/345710 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
