Re: [PATCH v3 1/1] Fix the coredump when memory backend id conflicts with default_ram_id

[David Hildenbrand]

On 13.06.22 16:37, Li Zhang wrote:
> On Mon, Jun 13, 2022 at 4:19 PM Igor Mammedov <imammedo@redhat.com> wrote:
>>
>> On Mon, 13 Jun 2022 12:44:02 +0200
>> Li Zhang <lizhang@suse.de> wrote:
>>
>>> When no memory backend is specified in machine options,
>>> a default memory device will be added with default_ram_id.
>>> However, if a memory backend object is added in QEMU options
>>> and id is the same as default_ram_id, a coredump happens.
>>>
>>> Command line:
>>> qemu-system-x86_64 -name guest=vmtest,debug-threads=on \
>>> -machine pc-q35-6.0,accel=kvm,usb=off,vmport=off \
>>> -smp 16,sockets=16,cores=1,threads=1 \
>>> -m 4G \
>>> -object memory-backend-ram,id=pc.ram,size=4G \
>>> -no-user-config -nodefaults -nographic
>>>
>>> Stack trace of thread 16903:
>>>     #0  0x00007fb109a9318b raise (libc.so.6 + 0x3a18b)
>>>     #1  0x00007fb109a94585 abort (libc.so.6 + 0x3b585)
>>>     #2  0x0000558c34bc89be error_handle_fatal (qemu-system-x86_64 + 
>>> 0x9c89be)
>>>     #3  0x0000558c34bc8aee error_setv (qemu-system-x86_64 + 0x9c8aee)
>>>     #4  0x0000558c34bc8ccf error_setg_internal (qemu-system-x86_64 + 
>>> 0x9c8ccf)
>>>     #5  0x0000558c349f6899 object_property_try_add (qemu-system-x86_64 + 
>>> 0x7f6899)
>>>     #6  0x0000558c349f7df8 object_property_try_add_child 
>>> (qemu-system-x86_64 + 0x7f7df8)
>>>     #7  0x0000558c349f7e91 object_property_add_child (qemu-system-x86_64 + 
>>> 0x7f7e91)
>>>     #8  0x0000558c3454686d create_default_memdev (qemu-system-x86_64 + 
>>> 0x34686d)
>>>     #9  0x0000558c34546f58 qemu_init_board (qemu-system-x86_64 + 0x346f58)
>>>     #10 0x0000558c345471b9 qmp_x_exit_preconfig (qemu-system-x86_64 + 
>>> 0x3471b9)
>>>     #11 0x0000558c345497d9 qemu_init (qemu-system-x86_64 + 0x3497d9)
>>>     #12 0x0000558c344e54c2 main (qemu-system-x86_64 + 0x2e54c2)
>>>     #13 0x00007fb109a7e34d __libc_start_main (libc.so.6 + 0x2534d)
>>>     #14 0x0000558c344e53ba _start (qemu-system-x86_64 + 0x2e53ba)
>>>
>>> Signed-off-by: Li Zhang <lizhang@suse.de>
>>
>> Acked-by: Igor Mammedov <imammedo@redhat.com>
>>
>>
>> CCing David as he probably would be the one to merge it
>>
> 
> Thanks for your review.


Acked-by: David Hildenbrand <david@redhat.com>


Paolo, can you queue this?

20220613104402.10279-1-lizhang@suse.de/">https://lore.kernel.org/qemu-devel/20220613104402.10279-1-lizhang@suse.de/

-- 
Thanks,

David / dhildenb