Re: [BUG] gve_adminq_release -- unbounded reset-wait loop, WARNs then spins forever

[Harshitha Ramamurthy]

On Thu, Aug 27, 2026 at 9:23 PM Farhad Alemi <farhad.alemi@xxxxxxxxxxxx> wrote:
>
> Hello,
>
> As part of the kernel research at ASU's SEFCOM
> lab, we hit the crash below. Crash reports can be found here:
>
>   https://github.com/farhad-alemi/public_bug_reports/tree/main/129-gve-adminq-release-unbounded-reset-wait/
>
>   Unrecoverable platform error!
>   WARNING: drivers/net/ethernet/google/gve/gve_adminq.c:378 at
> gve_adminq_release+0xff/0x260
> drivers/net/ethernet/google/gve/gve_adminq.c:378, CPU#1:
> syz.0.63/11869
>   Call Trace:
>    gve_adminq_release+0xff/0x260
> drivers/net/ethernet/google/gve/gve_adminq.c:378
>    gve_adminq_free+0x78/0x140 drivers/net/ethernet/google/gve/gve_adminq.c:392
>    gve_init_priv+0x2a8a/0x3450 drivers/net/ethernet/google/gve/gve_main.c:2509
>    gve_probe+0x61f/0x970 drivers/net/ethernet/google/gve/gve_main.c:2892
>    pci_device_probe+0x461/0xa50 drivers/pci/pci-driver.c:489
>    really_probe+0x267/0xaf0 drivers/base/dd.c:709
>    device_driver_attach+0xdc/0x1d0 drivers/base/dd.c:1206
>    bind_store+0x1d0/0x220 drivers/base/bus.c:267
>    kernfs_fop_write_iter+0x2fa/0x480 fs/kernfs/file.c:352
>
> Our reproducer.c is available upon request.

Hi,

Thanks for the report. Could you please share the reproducer too?

It's a good catch. The driver shouldn't spin infinitely if the
hypervisor is unresponsive/misbehaving. I will send out a patch to fix
this. Would be great if you could help test it also.
>
> Happy to test a patch if that would help.
>
> Regards,