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Re: QEMU | Heap-overflow in virtio_net_queue_enable (#1309)
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From: |
Xuan Zhuo |
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Subject: |
Re: QEMU | Heap-overflow in virtio_net_queue_enable (#1309) |
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Date: |
Thu, 10 Nov 2022 14:53:07 +0800 |
On Thu, 10 Nov 2022 00:11:00 -0500, "Michael S. Tsirkin" <mst@redhat.com> wrote:
> Xuan Zhuo pls take a look ASAP.
>
> On Thu, Nov 10, 2022 at 03:04:41AM +0000, Alexander Bulekov (@a1xndr) wrote:
> Alexander Bulekov created an issue: #1309
>
> Hello,
>
> I bisected this to 7f863302 ("virtio-net: support queue_enable"). CC:
> @mstredhat @jasowang (could not find Kangjie Xu or Xuan Zhuo gitlab accounts).
>
> Reproducer
>
> cat << EOF | ./qemu-system-i386 -display none -machine accel=qtest, -m \
> 512M -M q35 -nodefaults -device virtio-net,netdev=net0 -netdev \
> user,id=net0 -qtest stdio
> outl 0xcf8 0x80000810
> outl 0xcfc 0xc000
> outl 0xcf8 0x80000804
> outl 0xcfc 0x01
> outl 0xc00d 0x0200
> outl 0xcf8 0x80000890
> outb 0xcfc 0x4
> outl 0xcf8 0x80000889
> outl 0xcfc 0x1c000000
> outl 0xcf8 0x80000893
> outw 0xcfc 0x100
> EOF
Hi, I don't reproduce this problem, need valgrind?
Thanks.
sudo sh test.sh
[I 0.000000] OPENED
[R +0.014069] outl 0xcf8 0x80000810
[S +0.014089] OK
OK
[R +0.014100] outl 0xcfc 0xc000
[S +0.014113] OK
OK
[R +0.014117] outl 0xcf8 0x80000804
[S +0.014125] OK
OK
[R +0.014133] outl 0xcfc 0x01
[S +0.014210] OK
OK
[R +0.014215] outl 0xc00d 0x0200
[S +0.014222] OK
OK
[R +0.014226] outl 0xcf8 0x80000890
[S +0.014233] OK
OK
[R +0.014240] outb 0xcfc 0x4
[S +0.014247] OK
OK
[R +0.014252] outl 0xcf8 0x80000889
[S +0.014259] OK
OK
[R +0.014266] outl 0xcfc 0x1c000000
[S +0.014275] OK
OK
[R +0.014279] outl 0xcf8 0x80000893
[S +0.014288] OK
OK
[R +0.014292] outw 0xcfc 0x100
[S +0.014304] OK
OK
[I +0.014319] CLOSED
^Cqemu-system-i386: GLib: g_timer_elapsed: assertion 'timer != NULL'
failed
[I +0.000000] CLOSED
>
> Stack-Trace
>
> ==3742222==ERROR: AddressSanitizer: heap-buffer-overflow on address
> 0x61400001a9f8 at pc 0x55db851032b1 bp 0x7ffe639914c0 sp 0x7ffe639914b8
> READ of size 8 at 0x61400001a9f8 thread T0
> #0 0x55db851032b0 in virtio_net_queue_enable
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/net/virtio-net.c:572:14
> #1 0x55db85361748 in memory_region_write_accessor
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c:493:5
> #2 0x55db8536129a in access_with_adjusted_size
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c:555:18
> #3 0x55db85360c03 in memory_region_dispatch_write
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c
> #4 0x55db8485e11f in virtio_address_space_write
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/virtio/virtio-pci.c:592:5
> #5 0x55db8485e11f in virtio_write_config
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/virtio/virtio-pci.c:670:13
> #6 0x55db844de82a in pci_host_config_write_common
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/pci/pci_host.c:85:5
> #7 0x55db85361748 in memory_region_write_accessor
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c:493:5
> #8 0x55db8536129a in access_with_adjusted_size
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c:555:18
> #9 0x55db85360c03 in memory_region_dispatch_write
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/memory.c
> #10 0x55db853ad390 in flatview_write_continue
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/physmem.c:2825:23
> #11 0x55db853a4833 in flatview_write
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/physmem.c:2867:12
> #12 0x55db853a4543 in address_space_write
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/physmem.c:2963:18
> #13 0x55db85354567 in cpu_outw
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/ioport.c:70:5
> #14 0x55db853b8129 in qtest_process_command
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/qtest.c:480:13
> #15 0x55db853b6cb8 in qtest_process_inbuf
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/qtest.c:802:9
> #16 0x55db85a3e284 in fd_chr_read
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../chardev/char-fd.c:72:9
> #17 0x7f7f528c8a9e in g_main_context_dispatch
> (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x53a9e) (BuildId:
> 1697a734f1bc7448cd8772689a1c439343f062f7)
> #18 0x55db85cc1f33 in glib_pollfds_poll
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../util/main-loop.c:297:9
> #19 0x55db85cc1f33 in os_host_main_loop_wait
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../util/main-loop.c:320:5
> #20 0x55db85cc1f33 in main_loop_wait
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../util/main-loop.c:606:11
> #21 0x55db849163a6 in qemu_main_loop
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/runstate.c:739:9
> #22 0x55db83d54105 in qemu_default_main
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/main.c:37:14
> #23 0x7f7f520c6209 in __libc_start_call_main
> csu/../sysdeps/nptl/libc_start_call_main.h:58:16
> #24 0x7f7f520c62bb in __libc_start_main csu/../csu/libc-start.c:389:3
> #25 0x55db83c93ef0 in _start
> (/home/alxndr/Development/qemu-demo/qemu/build-asan/qemu-system-i386+0x1f9cef0)
> (BuildId: 574fb9ebea37c72f33a18ee7cda64eaf34590574)
>
> 0x61400001a9f8 is located 32 bytes to the right of 408-byte region
> [0x61400001a840,0x61400001a9d8)
> allocated by thread T0 here:
> #0 0x55db83d16f28 in __interceptor_calloc
> (/home/alxndr/Development/qemu-demo/qemu/build-asan/qemu-system-i386+0x201ff28)
> (BuildId: 574fb9ebea37c72f33a18ee7cda64eaf34590574)
> #1 0x7f7f528ceb30 in g_malloc0
> (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x59b30) (BuildId:
> 1697a734f1bc7448cd8772689a1c439343f062f7)
> #2 0x55db850f8d11 in virtio_net_device_realize
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/net/virtio-net.c:3621:18
> #3 0x55db85250321 in virtio_device_realize
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/virtio/virtio.c:4168:9
> #4 0x55db85658931 in device_set_realized
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/core/qdev.c:566:13
> #5 0x55db85679238 in property_set_bool
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/object.c:2285:5
> #6 0x55db8567442c in object_property_set
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/object.c:1420:5
> #7 0x55db8568012c in object_property_set_qobject
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/qom-qobject.c:28:10
> #8 0x55db844cef9a in pci_qdev_realize
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/pci/pci.c:2218:9
> #9 0x55db85658931 in device_set_realized
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../hw/core/qdev.c:566:13
> #10 0x55db85679238 in property_set_bool
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/object.c:2285:5
> #11 0x55db8567442c in object_property_set
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/object.c:1420:5
> #12 0x55db8568012c in object_property_set_qobject
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../qom/qom-qobject.c:28:10
> #13 0x55db8490f344 in qdev_device_add
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/qdev-monitor.c:733:11
> #14 0x55db849172b2 in qemu_create_cli_devices
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/vl.c:2536:5
> #15 0x55db849172b2 in qmp_x_exit_preconfig
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/vl.c:2604:5
> #16 0x55db8491db5f in qemu_init
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/vl.c:3601:9
> #17 0x55db83d54125 in main
> /home/alxndr/Development/qemu-demo/qemu/build-asan/../softmmu/main.c:47:5
>
> OSS-Fuzz Report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=53186
>
> libqtest Reproducer: repro.c
>
> Thank you
>
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