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Re: [Qemu-devel] [PULL 7/7] hw/misc/mmio_interface: Return after error_s
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PULL 7/7] hw/misc/mmio_interface: Return after error_setg() to avoid crash |
Date: |
Mon, 14 Aug 2017 15:11:50 +0200 |
On Mon, 14 Aug 2017 12:45:16 +0100
Peter Maydell <address@hidden> wrote:
> On 14 August 2017 at 12:07, Michael Tokarev <address@hidden> wrote:
> > From: Thomas Huth <address@hidden>
> >
> > QEMU currently abort()s if the user tries to specify the mmio_interface
> > device without parameters:
> >
> > x86_64-softmmu/qemu-system-x86_64 -nographic -device mmio_interface
> > qemu-system-x86_64: /home/thuth/devel/qemu/util/error.c:57: error_setv:
> > Assertion `*errp == ((void *)0)' failed.
> > Aborted (core dumped)
> >
> > This happens because the realize function is trying to set the errp
> > twice in this case. After setting an error, the realize function
> > should immediately return instead.
>
> It seems like it should be an error to permit this to be
> created from the command line at all -- the device is intended
> only as an internal implementation detail of the memory system,
> and it has a PROP_PTR property which can't be sensibly set
> from the command line.
>
> This patch is a correct fix for an immediate problem, but we should disable
> using this via -device somehow.
Setting DeviceClass::user_creatable to false should prevent creating device
with device_add interface. See: qdev_get_device_class()
>
> thanks
> -- PMM
>
[Qemu-devel] [PULL 1/7] unicore32: abort when entering "x 0" on the monitor, Michael Tokarev, 2017/08/14
[Qemu-devel] [PULL 4/7] qemu-iotests: get rid of _full_imgproto_details(), Michael Tokarev, 2017/08/14
[Qemu-devel] [PULL 5/7] qemu-iotests: remove commented out variables, Michael Tokarev, 2017/08/14
Re: [Qemu-devel] [PULL 0/7] Trivial patches for 2017-08-14, Peter Maydell, 2017/08/14