https://bugzilla.kernel.org/show_bug.cgi?id=25832 --- Comment #75 from rocko <rockorequin@xxxxxxxxxxx> 2011-04-26 01:22:52 --- Created an attachment (id=55522) --> (https://bugzilla.kernel.org/attachment.cgi?id=55522) null pointer deference hit while running without a desktop I just now managed to crash the kernel *without* a desktop running. Running the VM in recovery mode (ie console with no desktop), I tried two ways: a) I modified the script to mount the device after binding it. With no other modifications, the kernel did not crash with around 50 bind/mount/unbind attempts (which is not conclusive but seems a reasonable number of tests to try). Note that with this setup, the device kept getting a new drive letter on each bind, ie /dev/sdb, /dev/sdc, /dev/sdd, etc, whereas with a desktop running it is assigned each time to /dev/sdb. b) I modified the script to umount the device immediately after the subsequent unbind, ie the process is bind, mount on /tmp/usb, unbind, umount /tmp/usb. It crashed with the null pointer dereference first time (log attached just in case). So the umount might be the key to the issue. I should think desktop's auto-mounting code would also be trying to umount devices once it realises they're no longer there. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
