https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274375
--- Comment #4 from Zhenlei Huang <[email protected]> --- (In reply to Mark Johnston from comment #1) > This looks like a problem with DTrace, there is some logic in sdt.ko's > kldunload > handler to unregister providers, and something's going wrong there. > virtqueue.c > defines two rather odd SDT probes, so we're trying to unregister them. That happens when a module file with SDT probes is failed to be loaded by kernel linker. While the kernel try to invoke kld_unload_try event handlers for it and apparently it should not, as the file is in the progress of loading, i.e. it is partially linked. As for > Note: `kldload virtio.ko` can trigger the panic but `kldload virtio` will not. kernel linkers will check module named `virtio` firstly and refuse to load so no bad things happen. But for `virtio.ko` the kernel will load the file and get all modules in it before it knows `virtio` is present. Proposed fix https://reviews.freebsd.org/D44594. -- You are receiving this mail because: You are the assignee for the bug.
