[Qemu-devel] [PATCH 0/3] fix memory leaks when using object_property_get_str()

Greg Kurz posted 3 patches 6 years ago
Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/152231456507.69730.15601462044394150786.stgit@bahia.lan
Test checkpatch passed
Test docker-build@min-glib failed
Test docker-mingw@fedora passed
Test docker-quick@centos6 failed
Test s390x passed
exec.c                     |    1 +
hw/s390x/s390-virtio-ccw.c |    5 ++++-
target/i386/sev.c          |    4 +++-
3 files changed, 8 insertions(+), 2 deletions(-)
[Qemu-devel] [PATCH 0/3] fix memory leaks when using object_property_get_str()
Posted by Greg Kurz 6 years ago
According to include/qom/object.h:

/**
 * object_property_get_str:
 * @obj: the object
 * @name: the name of the property
 * @errp: returns an error if this function fails
 *
 * Returns: the value of the property, converted to a C string, or NULL if
 * an error occurs (including when the property value is not a string).
 * The caller should free the string.
 */

So I've checked all the call sites and found three places where the
string is obviously [*] leaked. Patch 2 and 3 fix very recent 2.12
commits, while patch 1 fixes a 2.4 commit (backported to 2.3.1).

Another potential candidate sits in query_memdev(), called during
the "info memdev" HMP and the "query-memdev" QMP commands, but
both take care of freeing the string eventually. Nothing to fix
there.

[*] allocated string is put in a local variable and not freed before
    returning

--
Greg

---

Greg Kurz (3):
      exec: fix memory leak in find_max_supported_pagesize()
      hw/s390x: fix memory leak in s390_init_ipl_dev()
      sev/i386: fix memory leak in sev_guest_init()


 exec.c                     |    1 +
 hw/s390x/s390-virtio-ccw.c |    5 ++++-
 target/i386/sev.c          |    4 +++-
 3 files changed, 8 insertions(+), 2 deletions(-)


Re: [Qemu-devel] [PATCH 0/3] fix memory leaks when using object_property_get_str()
Posted by no-reply@patchew.org 5 years, 12 months ago
Hi,

This series failed docker-quick@centos6 build test. Please find the testing commands and
their output below. If you have Docker installed, you can probably reproduce it
locally.

Type: series
Message-id: 152231456507.69730.15601462044394150786.stgit@bahia.lan
Subject: [Qemu-devel] [PATCH 0/3] fix memory leaks when using object_property_get_str()

=== TEST SCRIPT BEGIN ===
#!/bin/bash
set -e
git submodule update --init dtc
# Let docker tests dump environment info
export SHOW_ENV=1
export J=8
time make docker-test-quick@centos6
=== TEST SCRIPT END ===

Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
Switched to a new branch 'test'
15abdd963a sev/i386: fix memory leak in sev_guest_init()
20c477c6c5 hw/s390x: fix memory leak in s390_init_ipl_dev()
1937ef1647 exec: fix memory leak in find_max_supported_pagesize()

=== OUTPUT BEGIN ===
Submodule 'dtc' (git://git.qemu-project.org/dtc.git) registered for path 'dtc'
Cloning into '/var/tmp/patchew-tester-tmp-5hf354ro/src/dtc'...
Submodule path 'dtc': checked out 'e54388015af1fb4bf04d0bca99caba1074d9cc42'
  BUILD   centos6
make[1]: Entering directory '/var/tmp/patchew-tester-tmp-5hf354ro/src'
  GEN     /var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460/qemu.tar
Cloning into '/var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460/qemu.tar.vroot'...
done.
Checking out files:  37% (2296/6066)   
Checking out files:  38% (2306/6066)   
Checking out files:  39% (2366/6066)   
Checking out files:  40% (2427/6066)   
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Checking out files: 100% (6066/6066)   
Checking out files: 100% (6066/6066), done.
Your branch is up-to-date with 'origin/test'.
Submodule 'dtc' (git://git.qemu-project.org/dtc.git) registered for path 'dtc'
Cloning into '/var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460/qemu.tar.vroot/dtc'...
Submodule path 'dtc': checked out 'e54388015af1fb4bf04d0bca99caba1074d9cc42'
Submodule 'ui/keycodemapdb' (git://git.qemu.org/keycodemapdb.git) registered for path 'ui/keycodemapdb'
Cloning into '/var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460/qemu.tar.vroot/ui/keycodemapdb'...
Submodule path 'ui/keycodemapdb': checked out '6b3d716e2b6472eb7189d3220552280ef3d832ce'
tar: /var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460/qemu.tar: Wrote only 4096 of 10240 bytes
tar: Error is not recoverable: exiting now
failed to create tar file
  COPY    RUNNER
    RUN test-quick in qemu:centos6 
tar: Unexpected EOF in archive
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now
/var/tmp/qemu/run: line 32: prep_fail: command not found
Packages installed:
SDL-devel-1.2.14-7.el6_7.1.x86_64
bison-2.4.1-5.el6.x86_64
bzip2-devel-1.0.5-7.el6_0.x86_64
ccache-3.1.6-2.el6.x86_64
csnappy-devel-0-6.20150729gitd7bc683.el6.x86_64
flex-2.5.35-9.el6.x86_64
gcc-4.4.7-18.el6.x86_64
gettext-0.17-18.el6.x86_64
git-1.7.1-9.el6_9.x86_64
glib2-devel-2.28.8-9.el6.x86_64
libepoxy-devel-1.2-3.el6.x86_64
libfdt-devel-1.4.0-1.el6.x86_64
librdmacm-devel-1.0.21-0.el6.x86_64
lzo-devel-2.03-3.1.el6_5.1.x86_64
make-3.81-23.el6.x86_64
mesa-libEGL-devel-11.0.7-4.el6.x86_64
mesa-libgbm-devel-11.0.7-4.el6.x86_64
package g++ is not installed
pixman-devel-0.32.8-1.el6.x86_64
spice-glib-devel-0.26-8.el6.x86_64
spice-server-devel-0.12.4-16.el6.x86_64
tar-1.23-15.el6_8.x86_64
vte-devel-0.25.1-9.el6.x86_64
xen-devel-4.6.6-2.el6.x86_64
zlib-devel-1.2.3-29.el6.x86_64

Environment variables:
PACKAGES=bison     bzip2-devel     ccache     csnappy-devel     flex     g++     gcc     gettext     git     glib2-devel     libepoxy-devel     libfdt-devel     librdmacm-devel     lzo-devel     make     mesa-libEGL-devel     mesa-libgbm-devel     pixman-devel     SDL-devel     spice-glib-devel     spice-server-devel     tar     vte-devel     xen-devel     zlib-devel
HOSTNAME=aaf309766531
MAKEFLAGS= -j8
J=8
CCACHE_DIR=/var/tmp/ccache
EXTRA_CONFIGURE_OPTS=
V=
SHOW_ENV=1
PATH=/usr/lib/ccache:/usr/lib64/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PWD=/
TARGET_LIST=
SHLVL=1
HOME=/root
TEST_DIR=/tmp/qemu-test
FEATURES= dtc
DEBUG=
_=/usr/bin/env

Configure options:
--enable-werror --target-list=x86_64-softmmu,aarch64-softmmu --prefix=/tmp/qemu-test/install

ERROR: DTC (libfdt) version >= 1.4.2 not present.
       Please install the DTC (libfdt) devel package

Traceback (most recent call last):
  File "./tests/docker/docker.py", line 407, in <module>
    sys.exit(main())
  File "./tests/docker/docker.py", line 404, in main
    return args.cmdobj.run(args, argv)
  File "./tests/docker/docker.py", line 261, in run
    return Docker().run(argv, args.keep, quiet=args.quiet)
  File "./tests/docker/docker.py", line 229, in run
    quiet=quiet)
  File "./tests/docker/docker.py", line 147, in _do_check
    return subprocess.check_call(self._command + cmd, **kwargs)
  File "/usr/lib64/python2.7/subprocess.py", line 186, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['docker', 'run', '--label', 'com.qemu.instance.uuid=27d925ee34ae11e8a8ee52540069c830', '-u', '0', '--security-opt', 'seccomp=unconfined', '--rm', '--net=none', '-e', 'TARGET_LIST=', '-e', 'EXTRA_CONFIGURE_OPTS=', '-e', 'V=', '-e', 'J=8', '-e', 'DEBUG=', '-e', 'SHOW_ENV=1', '-e', 'CCACHE_DIR=/var/tmp/ccache', '-v', '/root/.cache/qemu-docker-ccache:/var/tmp/ccache:z', '-v', '/var/tmp/patchew-tester-tmp-5hf354ro/src/docker-src.2018-03-31-02.38.14.30460:/var/tmp/qemu:z,ro', 'qemu:centos6', '/var/tmp/qemu/run', 'test-quick']' returned non-zero exit status 1
make[1]: *** [tests/docker/Makefile.include:129: docker-run] Error 1
make[1]: Leaving directory '/var/tmp/patchew-tester-tmp-5hf354ro/src'
make: *** [tests/docker/Makefile.include:163: docker-run-test-quick@centos6] Error 2

real	1m0.928s
user	0m9.519s
sys	0m6.815s
=== OUTPUT END ===

Test command exited with code: 2


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