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| author | Dunrong Huang <huangdr@cloud-times.com> | 2013-03-19 16:27:29 +0800 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-03-19 11:48:56 +0100 |
| commit | a8e5cc0c076a6e3a62f0e9aad88b007dccf3dd17 (patch) | |
| tree | 37f4a7c9c0abb69d99ad24ed83fb08e95dae3ccf | |
| parent | f95e26ddf526a025aa1334bbe527739397970443 (diff) | |
| download | qemu-kvm-a8e5cc0c076a6e3a62f0e9aad88b007dccf3dd17.tar.gz | |
virtio-blk: Do not segfault fault if failed to initialize dataplane
$ ~/usr/bin/qemu-system-x86_64 -enable-kvm -m 1024 -drive if=none,id=drive0,cache=none,aio=native,format=raw,file=/root/Image/centos-6.4.raw -device virtio-blk-pci,drive=drive0,scsi=off,x-data-plane=on,config-wce=on # make dataplane fail to initialize
qemu-system-x86_64: -device virtio-blk-pci,drive=drive0,scsi=off,x-data-plane=on,config-wce=on: device is incompatible with x-data-plane, use config-wce=off
*** glibc detected *** /root/usr/bin/qemu-system-x86_64: free(): invalid pointer: 0x00007f001fef12f8 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x7d776)[0x7f00153a5776]
/root/usr/bin/qemu-system-x86_64(+0x2c34ec)[0x7f001cf5b4ec]
/root/usr/bin/qemu-system-x86_64(+0x342f9a)[0x7f001cfdaf9a]
/root/usr/bin/qemu-system-x86_64(+0x33694e)[0x7f001cfce94e]
....................
(gdb) bt
#0 0x00007f3bf3a12015 in raise () from /lib64/libc.so.6
#1 0x00007f3bf3a1348b in abort () from /lib64/libc.so.6
#2 0x00007f3bf3a51a4e in __libc_message () from /lib64/libc.so.6
#3 0x00007f3bf3a57776 in malloc_printerr () from /lib64/libc.so.6
#4 0x00007f3bfb60d4ec in free_and_trace (mem=0x7f3bfe0129f8) at vl.c:2786
#5 0x00007f3bfb68cf9a in virtio_cleanup (vdev=0x7f3bfe0129f8) at /root/Develop/QEMU/qemu/hw/virtio.c:900
#6 0x00007f3bfb68094e in virtio_blk_device_init (vdev=0x7f3bfe0129f8) at /root/Develop/QEMU/qemu/hw/virtio-blk.c:666
#7 0x00007f3bfb68dadf in virtio_device_init (qdev=0x7f3bfe0129f8) at /root/Develop/QEMU/qemu/hw/virtio.c:1092
#8 0x00007f3bfb50da46 in device_realize (dev=0x7f3bfe0129f8, err=0x7fff479c9258) at hw/qdev.c:176
.............................
In virtio_blk_device_init(), the memory which vdev point to is a static
member of "struct VirtIOBlkPCI", not heap memory, and it does not
get freed. So we shoule use virtio_common_cleanup() to clean this VirtIODevice
rather than virtio_cleanup(), which attempts to free the vdev.
This error was introduced by commit 05ff686536f408ba6e8426b1b54d25bd3379fda2
recently.
Signed-off-by: Dunrong Huang <huangdr@cloud-times.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | hw/virtio-blk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index e6f8875d00e..f2143fded38 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -663,7 +663,7 @@ static int virtio_blk_device_init(VirtIODevice *vdev) s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output); #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) { - virtio_cleanup(vdev); + virtio_common_cleanup(vdev); return -1; } #endif |