Bug#690505: [wheezy] broken usb device breaks direct i/o even to non-usb drives

[Jonathan Nieder <jrnieder@gmail.com>]

reassign 690504 src:linux
forcemerge 690505 690504
quit

Hi Ben,

Ben Hutchings wrote:
> mail user wrote:

>> plugging in a fake (128 that later turned out to be just 2Gb) flashdrive
>> in the usb port, dd it to /dev/null, ctrl-c, dd zeroes to it, ctrl-c,
>> dd unresponsive to ctrl-c
[...]
>> then
>> rmmod -f usb-storage
>>
>> then
>> unplug the flashdrive
[...]
>> [...] BUG: unable to handle kernel paging request at ffffffffa05b9020
[...]
> You cannot expect the kernel to work after forcing module removal.

Agreed, but isn't the initial uninterruptible dd hang a (hardware or
software) bug?

Thanks,
Jonathan