[Nut-upsuser] Kernel crash when using usbhid-ups driver.

[Charles Lepple]

On Jul 1, 2013, at 12:00 AM, Rod Roark wrote:

> Jun 30 10:29:24 ns1 kernel: [90099.128500] RIP: 0010:[<ffffffff811740db>] 
> [<ffffffff811740db>] __kmalloc+0x7b/0x1a0

The reference to kmalloc makes me think "memory corruption". I'd report this to Ubuntu as a kernel bug to see if this is an issue specific to that kernel version, but it might also be worth running a memory test.

There is a slim chance that we are triggering some sort of kernel logic bug. (The usbhid-ups driver is making the same requests, over and over, and nothing intentionally has a period of 1-3 days.) The kernel should return an error to the ioctl() syscall if it's a userspace programming bug.

-- 
Charles Lepple
clepple at gmail