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Re: [Qemu-devel] [PULL 00/47] ppc-for-2.10 queue 20170424

From: Peter Maydell
Subject: Re: [Qemu-devel] [PULL 00/47] ppc-for-2.10 queue 20170424
Date: Mon, 24 Apr 2017 14:12:19 +0100

On 24 April 2017 at 02:58, David Gibson <address@hidden> wrote:
> The following changes since commit 32c7e0ab755745e961f1772e95cac381cc68769d:
>   Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20170421' 
> into staging (2017-04-21 15:59:27 +0100)
> are available in the git repository at:
>   git://github.com/dgibson/qemu.git tags/ppc-for-2.10-20170424
> for you to fetch changes up to 4cab48942a1c5353f0a314fab1aa85a5f0a61461:
>   target/ppc: Style fixes (2017-04-24 08:56:19 +1000)
> ----------------------------------------------------------------
> ppc patch queue 2017-04-24
> Here's my first pull request for qemu-2.10, consisting of assorted
> patches which have accumulated while qemu-2.9 stabilized.  Highlights
> are:
>     * Rework / cleanup of the XICS interrupt controller
>     * Substantial improvement to the 'powernv' machine type
>         - Includes an MMIO XICS version
>     * POWER9 support improvements
>         - POWER9 guests with KVM
>         - Partial support for POWER9 guests with TCG
>     * IOMMU and VFIO improvements
>     * Assorted minor changes
> There are several IPMI patches here that aren't usually in my area of
> maintenance, but there isn't a regular maintainer and these patches
> are for the benefit of the powernv machine type.

Hi -- I'm afraid this pullreq generates a new clang sanitizer warning
running 'make check':

/home/petmay01/linaro/qemu-for-merges/hw/core/loader.c:67:15: runtime
error: null pointer passed as argument 1, which is declared to never
be null

It looks like we try to call open(NULL, ...).

Affected tests are in check-qtest-i386:

Here's a backtrace:

#0  0x00005555567e6197 in get_image_size (filename=0x0) at
#1  0x00005555568ead3c in ipmi_fru_init (fru=0x55555ab98588)
    at /home/petmay01/linaro/qemu-for-merges/hw/ipmi/ipmi_bmc_sim.c:1902
#2  0x00005555568e91ac in ipmi_sim_realize (dev=<optimised out>,
errp=<optimised out>)
    at /home/petmay01/linaro/qemu-for-merges/hw/ipmi/ipmi_bmc_sim.c:1943
#3  0x00005555567d6df6 in device_set_realized (obj=<optimised out>,
value=<optimised out>, errp=<optimised out>)
    at /home/petmay01/linaro/qemu-for-merges/hw/core/qdev.c:905
#4  0x0000555556d7b1f8 in property_set_bool (obj=0x55555ab93c90,
v=<optimised out>, name=<optimised out>, opaque=<optimised out>,
errp=0x7fffffffde90) at
#5  0x0000555556d7dd1d in object_property_set_qobject (obj=0x0,
value=<optimised out>, name=0x58fdf801 <error: Cannot access memory at
address 0x58fdf801>, errp=0x1) at
#6  0x0000555556d78cb2 in object_property_set_bool
(obj=0x55555ab93c90, value=<optimised out>, name=0x55555710e087
"realized", errp=0x7fffffffde90) at
#7  0x000055555661d80d in qdev_device_add (opts=<optimised out>,
errp=<optimised out>)
    at /home/petmay01/linaro/qemu-for-merges/qdev-monitor.c:630
#8  0x00005555566374cb in device_init_func (opaque=<optimised out>,
opts=0x0, errp=0x58fdf801)
    at /home/petmay01/linaro/qemu-for-merges/vl.c:2305
#9  0x000055555701dc81 in qemu_opts_foreach (list=<optimised out>,
func=<optimised out>, opaque=<optimised out>, errp=<optimised out>) at
#10 0x0000555556633289 in main (argc=<optimised out>, argv=<optimised
out>, envp=<optimised out>)
    at /home/petmay01/linaro/qemu-for-merges/vl.c:4583

It looks like the device doesn't handle not having its fru.filename
property set -- this should either cause an error in realize or the
rest of the device code should handle NULL.

-- PMM

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