23.07.2015 12:43, Oliver Neukum пишет:
On Mon, 2015-07-20 at 21:13 +0300, Eugene Shatokhin wrote:
[Race #5]
Race on dev->rx_urb_size. I reproduced it a similar way as the races
#2
and #3 (changing MTU while downloading files).
dev->rx_urb_size is written to here:
#0 usbnet_change_mtu (usbnet.c:392)
dev->rx_urb_size = dev->hard_mtu;
Here is the conflicting read from dev->rx_urb_size:
* rx_submit (usbnet.c:467)
size_t size = dev->rx_urb_size;
Yes, but what is the actual bad race? I mean, if you change
the MTU in operation, there will be a race. That is just
unavoidable.
Do we generate errors?
No, I have observed no problems due to this race so far.
Regards,
Eugene
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