Re: amd64 boot crash for lack of being set up to use of rtw89; linuxkpi calls on the stack, 0xdeadc0dedeadc13e and such involved, devfs_ioctl with dsw=0xdeadc0dedeadc0de

On Sat, 25 Jul 2026, Ryan Libby wrote:

> Drive-by comment, I don't know this code.
>
> It seems to suggest pdev->bus in lkpi_pci_dev_release points to a
> freed object.  Back in linux_pci_attach_device (frame #26), in the
> probe failure path that does goto out_probe, we free(pdev->bus,
> M_DEVBUF), and then call put_device(&pdev->dev) (frame #25), and then
> in lkpi_pci_dev_release (frame #21) we try to use the freed pdev->bus.
>
> You could try assigning pdev->bus to a distinct junk value after the
> free in linux_pci_attach_device to confirm this.

Yes, my comment I left before writing the reviews essentially gathers
some of these problems.  I think focusing on
         https://reviews.freebsd.org/D57430
would be good.  I'll have to go back to it as well and fold it in.

/bz

-- 
Bjoern A. Zeeb                                                     r15:7