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Re: QEMU | Heap-overflow in virtio_net_queue_enable (#1309)
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From: |
Alexander Bulekov |
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Subject: |
Re: QEMU | Heap-overflow in virtio_net_queue_enable (#1309) |
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Date: |
Thu, 10 Nov 2022 10:50:24 -0500 |
On 221110 1453, Xuan Zhuo wrote:
> 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?
It should work in a build with --enable-sanitizers
-Alex
>
>
> 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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