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Description of problem: when win2012r2 check file system on C:(at the beginning of guest boot), qemu-kvm core dump. The attachment is the guest snapshot. Version-Release number of selected component (if applicable): 3.10.0-57.el7.x86_64 qemu-kvm-rhev-1.5.3-20.el7.x86_64 How reproducible: always Steps to Reproduce: 1.Boot guest. <cli>: # gdb --args /usr/libexec/qemu-kvm -S -M pc-i440fx-rhel7.0.0 -cpu SandyBridge -enable-kvm -m 2G -smp 2,sockets=2,cores=1,threads=1 -name juli -uuid 355a2475-4e03-4cdd-bf7b-5d6a59edaa68 -rtc base=localtime,clock=host,driftfix=slew -device virtio-scsi-pci,bus=pci.0,addr=0x5,id=scsi0 -drive file=/home/juli/win2012r2.qcow2_v3,if=none,id=drive-scsi0-0-0,media=disk,cache=none,format=qcow2,werror=stop,rerror=stop,aio=native -device scsi-hd,drive=drive-scsi0-0-0,bus=scsi0.0,scsi-id=0,lun=0,id=juli,bootindex=0 -drive file=/home/juli/ISO/en_windows_server_2012_r2_x64_dvd_2707946.iso,if=none,media=cdrom,format=raw,aio=native,id=drive-ide1-0-0 -device ide-drive,drive=drive-ide1-0-0,id=ide1-0-0,bus=ide.0,unit=0,bootindex=4 -drive file=/home/juli/virtio-win-prewhql-0.1-74.iso,if=none,media=cdrom,format=raw,aio=native,id=drive-ide1-0-1 -device ide-drive,drive=drive-ide1-0-1,id=ide1-0-1,bus=ide.0,unit=1,bootindex=6 -device virtio-balloon-pci,id=ballooning -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 -k en-us -boot menu=on,reboot-timeout=-1,strict=on -qmp tcp:0:4477,server,nowait -serial unix:/tmp/ttyS0,server,nowait -vnc :3 -spice port=5939,disable-ticketing -vga qxl -global qxl-vga.revision=3 -monitor stdio -monitor tcp:0:7777,server,nowait -monitor unix:/tmp/monitor1,server,nowait -netdev tap,id=tap1,vhost=on,queues=4,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown,ifname=tap-juli -device virtio-net-pci,netdev=tap1,id=nic1,mq=on,vectors=17,mac=1a:59:0a:4b:aa:94 -device vfio-pci,host=09:05.6,id=hostnet_VF 2. 3. Actual results: qemu-kvm core dump when guest is doing fs check on C:. (gdb) bt #0 0x00007ffff30db979 in raise () from /lib64/libc.so.6 #1 0x00007ffff30dd088 in abort () from /lib64/libc.so.6 #2 0x00007ffff30d48e6 in __assert_fail_base () from /lib64/libc.so.6 #3 0x00007ffff30d4992 in __assert_fail () from /lib64/libc.so.6 #4 0x00005555556c8ca3 in scsi_dma_complete (opaque=<optimized out>, ret=<optimized out>) at hw/scsi/scsi-disk.c:286 #5 0x00005555556575a2 in dma_complete (dbs=0x555556a0fbb0, ret=0) at dma-helpers.c:124 #6 0x0000555555657812 in dma_bdrv_cb (opaque=opaque@entry=0x555556a0fbb0, ret=ret@entry=0) at dma-helpers.c:152 #7 0x0000555555657939 in dma_bdrv_io (bs=0x555556565d40, sg=0x555556a23d10, sector_num=720032, io_func=0x555555618780 <bdrv_aio_readv>, cb=cb@entry=0x5555556c8c50 <scsi_dma_complete>, opaque=opaque@entry=0x555556f55b30, dir=dir@entry=DMA_DIRECTION_FROM_DEVICE) at dma-helpers.c:222 #8 0x000055555565798d in dma_bdrv_read (bs=<optimized out>, sg=<optimized out>, sector=<optimized out>, cb=cb@entry= 0x5555556c8c50 <scsi_dma_complete>, opaque=opaque@entry=0x555556f55b30) at dma-helpers.c:231 #9 0x00005555556c7d7d in scsi_do_read (opaque=0x555556f55b30, ret=0) at hw/scsi/scsi-disk.c:349 #10 0x0000555555614392 in bdrv_co_em_bh (opaque=<optimized out>) at block.c:4041 ---Type <return> to continue, or q <return> to quit--- #11 0x000055555560493a in aio_bh_poll (ctx=ctx@entry=0x555556505e00) at async.c:70 #12 0x0000555555604508 in aio_poll (ctx=0x555556505e00, blocking=blocking@entry=false) at aio-posix.c:185 #13 0x0000555555604830 in aio_ctx_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at async.c:167 #14 0x00007ffff74e9e06 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #15 0x00005555556f9dca in glib_pollfds_poll () at main-loop.c:187 #16 os_host_main_loop_wait (timeout=<optimized out>) at main-loop.c:232 #17 main_loop_wait (nonblocking=<optimized out>) at main-loop.c:464 #18 0x00005555555ffe88 in main_loop () at vl.c:1986 #19 main (argc=<optimized out>, argv=<optimized out>, envp=<optimized out>) at vl.c:4343 Expected results: qemu-kvm works well. Additional info: