Hey Scott,
On Fri, Dec 05, 2008 at 11:40:30PM +1300, Scott Raynel wrote:
Hi Simon,
On 5/12/2008, at 12:35 AM, Simon Wunderlich wrote:
Hey Scott,
thank you very much for the fix! Can you confirm if this bug is related to https://dev.open-mesh.net/batman/ticket/86 ? This bug has very likely been caused by a memory corruption, but i couldn´t find where. (i have not experienced any kernel panics by this however ...).
It is quite possible that they are related. The slab error states that a memory allocation was overwritten - the same problem as my patch fixed. However, I can't confirm whether it is the same memory allocation or a different one. The stack trace I got specifically mentioned the kfree() in send_own_packet(), whereas this stack trace does not.
Is that bug easily reproducible? It will be a couple of days before I can try to look at it.
Yep, it was quite easy: just turn it on and off a few times. (echo device and nothing into /proc/net/batman-adv/interfaces). The warning appeared after 10 times in my qemu instance. No crash, only this warning.
Also, the stack trace is confusing as it appears to indicate a kfree() within hardif_min_mtu(), which I can't find :)
That's the problem, that is what confused me at this point. :/
I'll try to do some stress testing of the module with the slab debugger turned on for a while and see what happens.
Sounds great. Thanks for you hard work. :)
best regards, Simon