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[Qemu-devel] [Bug 1727250] Re: qemu-io-test 147 segfaults when configure

From: R.Nageswara Sastry
Subject: [Qemu-devel] [Bug 1727250] Re: qemu-io-test 147 segfaults when configured with gcov
Date: Wed, 25 Oct 2017 09:45:21 -0000 
qemu-iotest 194 also fails in the similar stack trace.

# ./check -qcow2 194
QEMU          -- "/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64" 
-nodefaults -machine accel=qtest
QEMU_IMG      -- "/home/nasastry/qemu_gcov/qemu-img"
QEMU_IO       -- "/home/nasastry/qemu_gcov/qemu-io"  --cache writeback -f qcow2
QEMU_NBD      -- "/home/nasastry/qemu_gcov/qemu-nbd"
IMGFMT        -- qcow2 (compat=1.1)
IMGPROTO      -- file
PLATFORM      -- Linux/ppc64le zzfp365-lp1 
4.13.0-4.rel.git49564cb.el7.centos.ppc64le
TEST_DIR      -- /home/nasastry/qemu_gcov/tests/qemu-iotests/scratch
SOCKET_SCM_HELPER -- 
/home/nasastry/qemu_gcov/tests/qemu-iotests/socket_scm_helper

194 1s ... [failed, exit status 1] - output mismatch (see 194.out.bad)
--- /home/nasastry/qemu_gcov/tests/qemu-iotests/194.out 2017-10-09 
14:09:04.272726282 +0530
+++ /home/nasastry/qemu_gcov/tests/qemu-iotests/194.out.bad     2017-10-25 
15:13:26.630139740 +0530
@@ -1,18 +1,18 @@
+WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu_gcov/tests/qemu-iotests/scratch/qemusource-38326-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu_gcov/tests/qemu-iotests/scratch/qemusource-38326-qtest.sock
 -machine accel=qtest -nodefaults -machine accel=qtest -drive 
if=virtio,id=drive0,file=/home/nasastry/qemu_gcov/tests/qemu-iotests/scratch/38326-source.img,format=qcow2,cache=writeback
 Launching VMs...
 Launching NBD server on destination...
 {u'return': {}}
 {u'return': {}}
 Starting `drive-mirror` on source...
-{u'return': {}}
+None
 Waiting for `drive-mirror` to complete...
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': 
{u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 
1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_READY'}
-Starting migration...
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': 
{u'status': u'setup'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': 
{u'status': u'active'}, u'event': u'MIGRATION'}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': 
{u'status': u'completed'}, u'event': u'MIGRATION'}
-Gracefully ending the `drive-mirror` job on source...
-{u'return': {}}
-{u'timestamp': {u'seconds': 'SECS', u'microseconds': 'USECS'}, u'data': 
{u'device': u'mirror-job0', u'type': u'mirror', u'speed': 0, u'len': 
1073741824, u'offset': 1073741824}, u'event': u'BLOCK_JOB_COMPLETED'}
-Stopping the NBD server on destination...
-{u'return': {}}
+Traceback (most recent call last):
+  File "194", line 60, in <module>
+    iotests.log(source_vm.event_wait('BLOCK_JOB_READY'),
+  File "/home/nasastry/qemu_gcov/tests/qemu-iotests/../../scripts/qemu.py", 
line 319, in event_wait
+    event = self._qmp.pull_event(wait=timeout)
+  File "/home/nasastry/qemu_gcov/tests/qemu-iotests/../../scripts/qmp/qmp.py", 
line 216, in pull_event
+    self.__get_events(wait)
+  File "/home/nasastry/qemu_gcov/tests/qemu-iotests/../../scripts/qmp/qmp.py", 
line 128, in __get_events
+    raise QMPConnectError("Error while reading from socket")
+qmp.qmp.QMPConnectError: Error while reading from socket
Failures: 194
Failed 1 of 1 tests

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https://bugs.launchpad.net/bugs/1727250

Title:
  qemu-io-test 147 segfaults when configured with gcov

Status in QEMU:
  New

Bug description:
  Head is at 3d7196d43bfe12efe98568cb60057e273652b99b

  Steps to re-produce:
  1. git clone
  ./configure --enable-gcov --target-list=ppc64-softmmu
  make
  cd tests/qemu-iotests

  2. export qemu binary, in my environment
  export QEMU_PROG=/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64

  3. Run test 147 with format qcow2
  ./check -qcow2 147

  QEMU          -- "/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64" 
-nodefaults -machine accel=qtest
  QEMU_IMG      -- "/home/nasastry/qemu/qemu-img"
  QEMU_IO       -- "/home/nasastry/qemu/qemu-io"  --cache writeback -f qcow2
  QEMU_NBD      -- "/home/nasastry/qemu/qemu-nbd"
  IMGFMT        -- qcow2 (compat=1.1)
  IMGPROTO      -- file
  PLATFORM      -- Linux/ppc64le zzfp365-lp1 
4.13.0-4.rel.git49564cb.el7.centos.ppc64le
  TEST_DIR      -- /home/nasastry/qemu/tests/qemu-iotests/scratch
  SOCKET_SCM_HELPER -- /home/nasastry/qemu/tests/qemu-iotests/socket_scm_helper

  147 0s ... [failed, exit status 1] - output mismatch (see 147.out.bad)
  --- /home/nasastry/qemu/tests/qemu-iotests/147.out    2017-10-25 
14:04:54.978600753 +0530
  +++ /home/nasastry/qemu/tests/qemu-iotests/147.out.bad        2017-10-25 
14:09:53.769783770 +0530
  @@ -1,5 +1,95 @@
  -......
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +WARNING:qemu:qemu received signal -11: 
/home/nasastry/qemu_gcov/ppc64-softmmu/qemu-system-ppc64 -chardev 
socket,id=mon,path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-monitor.sock
 -mon chardev=mon,mode=control -display none -vga none -qtest 
unix:path=/home/nasastry/qemu/tests/qemu-iotests/scratch/qemu-28636-qtest.sock 
-machine accel=qtest -nodefaults -machine accel=qtest
  +FFFFFF
  +======================================================================
  +FAIL: test_fd (__main__.BuiltinNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 203, in test_fd
  +    self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
  +======================================================================
  +FAIL: test_inet (__main__.BuiltinNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 146, in test_inet
  +    flatten_sock_addr(address), 'nbd-export')
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
  +======================================================================
  +FAIL: test_inet6 (__main__.BuiltinNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 171, in test_inet6
  +    self.client_test(filename, flatten_sock_addr(address), 'nbd-export')
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
  +======================================================================
  +FAIL: test_unix (__main__.BuiltinNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 179, in test_unix
  +    flatten_sock_addr(address), 'nbd-export')
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
  +======================================================================
  +FAIL: test_inet (__main__.QemuNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 96, in test_inet
  +    flatten_sock_addr(address))
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
  +======================================================================
  +FAIL: test_unix (__main__.QemuNBD)
  +----------------------------------------------------------------------
  +Traceback (most recent call last):
  +  File "147", line 103, in test_unix
  +    flatten_sock_addr(address))
  +  File "147", line 55, in client_test
  +    self.assert_qmp(result, 'return', {})
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 315, in 
assert_qmp
  +    result = self.dictpath(d, path)
  +  File "/home/nasastry/qemu/tests/qemu-iotests/iotests.py", line 274, in 
dictpath
  +    self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
  +AssertionError: failed path traversal for "return" in "None"
  +
   ----------------------------------------------------------------------
   Ran 6 tests

  -OK
  +FAILED (failures=6)
  Failures: 147
  Failed 1 of 1 tests

  With out gcov configured, the above test get pass.
  export QEMU_PROG=/home/nasastry/qemu/ppc64-softmmu/qemu-system-ppc64
  ./check -qcow2 147
  QEMU          -- "/home/nasastry/qemu/ppc64-softmmu/qemu-system-ppc64" 
-nodefaults -machine accel=qtest
  QEMU_IMG      -- "/home/nasastry/qemu/qemu-img"
  QEMU_IO       -- "/home/nasastry/qemu/qemu-io"  --cache writeback -f qcow2
  QEMU_NBD      -- "/home/nasastry/qemu/qemu-nbd"
  IMGFMT        -- qcow2 (compat=1.1)
  IMGPROTO      -- file
  PLATFORM      -- Linux/ppc64le zzfp365-lp1 
4.13.0-4.rel.git49564cb.el7.centos.ppc64le
  TEST_DIR      -- /home/nasastry/qemu/tests/qemu-iotests/scratch
  SOCKET_SCM_HELPER -- /home/nasastry/qemu/tests/qemu-iotests/socket_scm_helper

  147
  Passed all 1 tests

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