On Mon, 2021-11-01 at 15:16 +0100, Michal Privoznik wrote:
> I've been looking at our tests lately and noticed an opportunity to
> rewrite pieces of code to g_auto() magic.
>
> Michal Prívozník (7):
> qemuagenttest: Don't leak virTypedParameter on failure
> Prefer g_auto(GStrv) over g_strfreev()
> qemu: Use g_autoptr(qemuMonitorCPUModelInfo)
> qemuConnectStealCPUModelFromInfo: Drop needless 'cleanup' label
> tests: Use g_autoptr(qemuMonitorTest)
> test: Use g_autofree more
> tests: Drop cleanup/error labels
>
> src/bhyve/bhyve_command.c | 3 +-
> src/bhyve/bhyve_parse_command.c | 22 +--
> src/libxl/libxl_conf.c | 9 +-
> src/libxl/xen_common.c | 18 +-
> src/libxl/xen_xl.c | 17 +-
> src/lxc/lxc_container.c | 4 +-
> src/lxc/lxc_native.c | 24 +--
> src/qemu/qemu_driver.c | 17 +-
> src/remote/remote_daemon_dispatch.c | 3 +-
> src/remote/remote_driver.c | 4 +-
> src/storage/storage_backend_rbd.c | 3 +-
> src/util/vircgroup.c | 3 +-
> src/util/vircgroupv2.c | 4 +-
> src/util/virfirmware.c | 6 +-
> src/util/viruri.c | 3 +-
> src/vbox/vbox_common.c | 12 +-
> src/vbox/vbox_snapshot_conf.c | 40 ++--
> src/vbox/vbox_tmpl.c | 3 +-
> src/vz/vz_sdk.c | 3 +-
> tests/qemuagenttest.c | 286 ++++++++++++----------------
> tests/qemucapabilitiestest.c | 22 +--
> tests/qemuhotplugtest.c | 3 +-
> tests/qemumigparamstest.c | 40 ++--
> tests/qemumonitorjsontest.c | 95 ++++-----
> tests/qemumonitortestutils.c | 63 +++---
> tests/vboxsnapshotxmltest.c | 3 +-
> tests/virconftest.c | 3 +-
> tests/virfiletest.c | 3 +-
> tests/virstringtest.c | 3 +-
> tools/virsh-host.c | 13 +-
> tools/virt-login-shell-helper.c | 7 +-
> tools/vsh.c | 4 +-
> 32 files changed, 279 insertions(+), 464 deletions(-)
>
When applying this series, compiling with ASAN enabled, and running
"virsh hypervisor-cpu-compare empty.xml" with "empty.xml" == "<cpu/>",
I see the following error message:
=================================================================
==45506==ERROR: AddressSanitizer: heap-use-after-free on address
0x602000009b70 at pc 0x5588d1c81aa8 bp 0x7fffc8510af0 sp 0x7fffc8510ae8
READ of size 8 at 0x602000009b70 thread T0
#0 0x5588d1c81aa7 in cmdHypervisorCPUCompare
../../git/libvirt/tools/virsh-host.c:1605
#1 0x5588d1cead5d in vshCommandRun
../../git/libvirt/tools/vsh.c:1309
#2 0x5588d1bd5331 in main ../../git/libvirt/tools/virsh.c:899
#3 0x7fc8c4f32b74 in __libc_start_main (/lib64/libc.so.6+0x27b74)
#4 0x5588d1bcef3d in _start
(/home/twiederh/build/libvirt/tools/virsh+0x16bf3d)
0x602000009b70 is located 0 bytes inside of 16-byte region
[0x602000009b70,0x602000009b80)
freed by thread T0 here:
#0 0x7fc8c9020647 in free (/lib64/libasan.so.6+0xae647)
#1 0x7fc8c5b3a24c in g_free (/lib64/libglib-2.0.so.0+0x5a24c)
#2 0x5588d1c7ebcb in vshExtractCPUDefXMLs
../../git/libvirt/tools/virsh-host.c:1062
#3 0x5588d1c819fe in cmdHypervisorCPUCompare
../../git/libvirt/tools/virsh-host.c:1602
#4 0x5588d1cead5d in vshCommandRun
../../git/libvirt/tools/vsh.c:1309
#5 0x5588d1bd5331 in main ../../git/libvirt/tools/virsh.c:899
#6 0x7fc8c4f32b74 in __libc_start_main (/lib64/libc.so.6+0x27b74)
previously allocated by thread T0 here:
#0 0x7fc8c9020af7 in calloc (/lib64/libasan.so.6+0xaeaf7)
#1 0x7fc8c5b3de60 in g_malloc0 (/lib64/libglib-2.0.so.0+0x5de60)
#2 0x5588d1c819fe in cmdHypervisorCPUCompare
../../git/libvirt/tools/virsh-host.c:1602
#3 0x5588d1cead5d in vshCommandRun
../../git/libvirt/tools/vsh.c:1309
#4 0x5588d1bd5331 in main ../../git/libvirt/tools/virsh.c:899
#5 0x7fc8c4f32b74 in __libc_start_main (/lib64/libc.so.6+0x27b74)
SUMMARY: AddressSanitizer: heap-use-after-free
../../git/libvirt/tools/virsh-host.c:1605 in cmdHypervisorCPUCompare
Shadow bytes around the buggy address:
0x0c047fff9310: fa fa fd fa fa fa fd fd fa fa fd fa fa fa fd fa
0x0c047fff9320: fa fa fd fa fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff9330: fa fa fd fa fa fa fd fa fa fa fd fd fa fa fd fd
0x0c047fff9340: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
0x0c047fff9350: fa fa fd fd fa fa fd fd fa fa fd fd fa fa fd fd
=>0x0c047fff9360: fa fa fd fd fa fa fd fd fa fa fd fa fa fa[fd]fd
0x0c047fff9370: fa fa fd fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9380: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff9390: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff93a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff93b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==45506==ABORTING
