On Thu, Aug 08, 2024 at 01:37:42PM +0200, Jiri Pirko wrote: > Thu, Aug 08, 2024 at 09:51:41AM CEST, kirill.shutemov@xxxxxxxxxxxxxxx wrote: > >Hongyu reported a hang on kexec in a VM. QEMU reported invalid memory > >accesses during the hang. > > > > Invalid read at addr 0x102877002, size 2, region '(null)', reason: rejected > > Invalid write at addr 0x102877A44, size 2, region '(null)', reason: rejected > > ... > > > >It was traced down to virtio-console. Kexec works fine if virtio-console > >is not in use. > > > >Looks like virtio-console continues to write to the MMIO even after > >underlying virtio-pci device is removed. > > > >The problem can be mitigated by removing all virtio devices on virtio > >bus shutdown. > > > >Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > >Reported-by: Hongyu Ning <hongyu.ning@xxxxxxxxxxxxxxx> > > Could you provide a "Fixes:" tag pointing to the commit that introduced > the bug? I am not sure if it is a regression. Maybe it was there forever. Hongyu, could you please check with bisect if it is possible to point to a specific commit? -- Kiryl Shutsemau / Kirill A. Shutemov
