Re: [PATCH 8/9] virtio-gpu: fix hang under TCG when unmapping blob

[Dmitry Osipenko]

On 4/30/25 00:19, Alex Bennée wrote:
>> This change makes QEMU to crash.
> What is your command line to cause the crash?

I applied this patch on top of native context v11, ran AMD nctx and got a crash 
on SDDM startup.

(gdb) bt
#0  0x00007ffff5411b54 in __pthread_kill_implementation () at /lib64/libc.so.6
#1  0x00007ffff53b8f9e in raise () at /lib64/libc.so.6
#2  0x00007ffff53a0942 in abort () at /lib64/libc.so.6
#3  0x00007ffff6cbf18c in g_assertion_message[cold] () at 
/lib64/libglib-2.0.so.0
#4  0x00007ffff6d2ea07 in g_assertion_message_expr () at /lib64/libglib-2.0.so.0
#5  0x0000555555a42820 in object_finalize (data=0x555557c9d290) at 
../qom/object.c:732
#6  object_unref (objptr=0x555557c9d290) at ../qom/object.c:1231
#7  0x00005555559f3df3 in memory_region_unref (mr=<optimized out>) at 
../system/memory.c:1854
#8  0x0000555555a003a7 in phys_section_destroy (mr=0x555559ef5b60) at 
../system/physmem.c:1035
#9  phys_sections_free (map=0x555559c2dd80) at ../system/physmem.c:1048
#10 address_space_dispatch_free (d=0x555559c2dd70) at ../system/physmem.c:2692
#11 0x00005555559f1d33 in flatview_destroy (view=0x55555a54a720) at 
../system/memory.c:295
#12 0x0000555555c278cf in call_rcu_thread (opaque=opaque@entry=0x0) at 
../util/rcu.c:301
#13 0x0000555555c1cc68 in qemu_thread_start (args=0x555557993d30) at 
../util/qemu-thread-posix.c:541
#14 0x00007ffff540fba8 in start_thread () at /lib64/libc.so.6
#15 0x00007ffff5493b8c in __clone3 () at /lib64/libc.so.6

-- 
Best regards,
Dmitry