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+assert issue locates in hw/scsi/lsi53c895a.c:624: lsi_do_dma: Assertion `s->current' failed
+
+Hello,
+
+I found an assertion failure in hw/scsi/lsi53c895a.c:624
+
+This was found in latest version 5.2.0.
+
+
+my reproduced environment is as follows:
+    Host: ubuntu 18.04
+    Guest: ubuntu 18.04
+
+
+
+QEMU boot command line:
+qemu-system-x86_64 -enable-kvm -boot c -m 4G -drive format=qcow2,file=./ubuntu.img -nic user,hostfwd=tcp:0.0.0.0:5555-:22 -display none -device lsi53c895a -trace lsi\*
+
+Backtrace is as follows:
+#0  0x00007f845c6eff47 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
+#1  0x00007f845c6f18b1 in __GI_abort () at abort.c:79
+#2  0x00007f845c6e142a in __assert_fail_base (fmt=0x7f845c868a38 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x55a1034486a0 "s->current", file=file@entry=0x55a103448360 "../hw/scsi/lsi53c895a.c", line=line@entry=624, function=function@entry=0x55a10344ae60 <__PRETTY_FUNCTION__.31674> "lsi_do_dma") at assert.c:92
+#3  0x00007f845c6e14a2 in __GI___assert_fail (assertion=0x55a1034486a0 "s->current", file=0x55a103448360 "../hw/scsi/lsi53c895a.c", line=624, function=0x55a10344ae60 <__PRETTY_FUNCTION__.31674> "lsi_do_dma") at assert.c:101
+#4  0x000055a102049c65 in lsi_do_dma (s=0x62600000c100, out=1) at ../hw/scsi/lsi53c895a.c:624
+#5  0x000055a102051573 in lsi_execute_script (s=0x62600000c100) at ../hw/scsi/lsi53c895a.c:1250
+#6  0x000055a10205b05d in lsi_reg_writeb (s=0x62600000c100, offset=47, val=178 '\262') at ../hw/scsi/lsi53c895a.c:1984
+#7  0x000055a10205fef8 in lsi_io_write (opaque=0x62600000c100, addr=47, val=178, size=1) at ../hw/scsi/lsi53c895a.c:2146
+#8  0x000055a102d1b791 in memory_region_write_accessor (mr=0x62600000cbe0, addr=47, value=0x7f8349dfe2f8, size=1, shift=0, mask=255, attrs=...) at ../softmmu/memory.c:484
+#9  0x000055a102d1bba8 in access_with_adjusted_size (addr=47, value=0x7f8349dfe2f8, size=1, access_size_min=1, access_size_max=1, access_fn=0x55a102d1b4de <memory_region_write_accessor>, mr=0x62600000cbe0, attrs=...) at ../softmmu/memory.c:545
+#10 0x000055a102d261ef in memory_region_dispatch_write (mr=0x62600000cbe0, addr=47, data=178, op=MO_8, attrs=...) at ../softmmu/memory.c:1494
+#11 0x000055a102b57c3c in flatview_write_continue (fv=0x6060000ea920, addr=49199, attrs=..., ptr=0x7f8449efb000, len=1, addr1=47, l=1, mr=0x62600000cbe0) at ../softmmu/physmem.c:2767
+#12 0x000055a102b57f07 in flatview_write (fv=0x6060000ea920, addr=49199, attrs=..., buf=0x7f8449efb000, len=1) at ../softmmu/physmem.c:2807
+#13 0x000055a102b587cb in address_space_write (as=0x55a105ebca80 <address_space_io>, addr=49199, attrs=..., buf=0x7f8449efb000, len=1) at ../softmmu/physmem.c:2899
+#14 0x000055a102b58878 in address_space_rw (as=0x55a105ebca80 <address_space_io>, addr=49199, attrs=..., buf=0x7f8449efb000, len=1, is_write=true) at ../softmmu/physmem.c:2909
+#15 0x000055a102ad4d50 in kvm_handle_io (port=49199, attrs=..., data=0x7f8449efb000, direction=1, size=1, count=1) at ../accel/kvm/kvm-all.c:2283
+#16 0x000055a102ad6a0f in kvm_cpu_exec (cpu=0x62e000000400) at ../accel/kvm/kvm-all.c:2529
+#17 0x000055a102c26fbb in kvm_vcpu_thread_fn (arg=0x62e000000400) at ../accel/kvm/kvm-cpus.c:49
+#18 0x000055a1032c08f8 in qemu_thread_start (args=0x603000082780) at ../util/qemu-thread-posix.c:521
+#19 0x00007f845caa96db in start_thread (arg=0x7f8349dff700) at pthread_create.c:463
+#20 0x00007f845c7d2a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
+
+
+The poc is attached.
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