On Fri, Aug 16, 2013 at 06:15:07PM +0200, Richard Weinberger wrote: > On UML I hit the case that pwq is NULL. > Then we oops at &pwq->wq...
Hmmm? I'm confused. &pwq->wq is pwq's pointer + wq's offset in pwq. It doesn't involve dereferencing pwq->wq. Maybe uml isn't implementing probe_kernel_thread()? Now that I think about it, I'm not sure how it could. cc'ing uml people. Hey, guys, workqueue uses proble_kernel_read() to print out workqueue related information during oops because those events are completely asynchronous and workqueue states may not be consistently accessible. It seems like uml doesn't implement probe_kernel_read() and tries direct derference of incorrect pointers leading to its own oops. Maybe uml should check whether the memory is mapped from probe_kernel_read()? Thanks. -- tejun ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
