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


From: Murilo Opsfelder Araújo
Subject: [Qemu-devel] [Bug 1727250] Re: qemu-io-test 147 segfaults when configured with gcov
Date: Tue, 09 Jan 2018 17:48:01 -0000

The fix was committed:

https://git.qemu.org/?p=qemu.git;a=commitdiff;h=c4365735a7d38f4355c6f77e6670d3972315f7c2

commit c4365735a7d38f4355c6f77e6670d3972315f7c2
Author: Murilo Opsfelder Araujo <address@hidden>
Date:   Fri Jan 5 11:32:41 2018 -0200

    block/nbd: fix segmentation fault when .desc is not null-terminated

** Changed in: qemu
       Status: In Progress => Fix Committed

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

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

Status in QEMU:
  Fix Committed

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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