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[83.57.170.138]) by smtp.gmail.com with ESMTPSA id y189sm6057602wmd.27.2020.07.14.09.47.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 14 Jul 2020 09:47:04 -0700 (PDT) Subject: Re: [PATCH] hmp: fix memory leak in qom_composition_compare() To: Li Qiang , pbonzini@redhat.com, berrange@redhat.com, ehabkost@redhat.com, armbru@redhat.com References: <20200714151152.54760-1-liq3ea@163.com> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= Autocrypt: addr=philmd@redhat.com; keydata= mQINBDXML8YBEADXCtUkDBKQvNsQA7sDpw6YLE/1tKHwm24A1au9Hfy/OFmkpzo+MD+dYc+7 bvnqWAeGweq2SDq8zbzFZ1gJBd6+e5v1a/UrTxvwBk51yEkadrpRbi+r2bDpTJwXc/uEtYAB GvsTZMtiQVA4kRID1KCdgLa3zztPLCj5H1VZhqZsiGvXa/nMIlhvacRXdbgllPPJ72cLUkXf z1Zu4AkEKpccZaJspmLWGSzGu6UTZ7UfVeR2Hcc2KI9oZB1qthmZ1+PZyGZ/Dy+z+zklC0xl XIpQPmnfy9+/1hj1LzJ+pe3HzEodtlVA+rdttSvA6nmHKIt8Ul6b/h1DFTmUT1lN1WbAGxmg CH1O26cz5nTrzdjoqC/b8PpZiT0kO5MKKgiu5S4PRIxW2+RA4H9nq7nztNZ1Y39bDpzwE5Sp bDHzd5owmLxMLZAINtCtQuRbSOcMjZlg4zohA9TQP9krGIk+qTR+H4CV22sWldSkVtsoTaA2 qNeSJhfHQY0TyQvFbqRsSNIe2gTDzzEQ8itsmdHHE/yzhcCVvlUzXhAT6pIN0OT+cdsTTfif MIcDboys92auTuJ7U+4jWF1+WUaJ8gDL69ThAsu7mGDBbm80P3vvUZ4fQM14NkxOnuGRrJxO qjWNJ2ZUxgyHAh5TCxMLKWZoL5hpnvx3dF3Ti9HW2dsUUWICSQARAQABtDJQaGlsaXBwZSBN YXRoaWV1LURhdWTDqSAoUGhpbCkgPHBoaWxtZEByZWRoYXQuY29tPokCVQQTAQgAPwIbDwYL CQgHAwIGFQgCCQoLBBYCAwECHgECF4AWIQSJweePYB7obIZ0lcuio/1u3q3A3gUCXsfWwAUJ KtymWgAKCRCio/1u3q3A3ircD/9Vjh3aFNJ3uF3hddeoFg1H038wZr/xi8/rX27M1Vj2j9VH 0B8Olp4KUQw/hyO6kUxqkoojmzRpmzvlpZ0cUiZJo2bQIWnvScyHxFCv33kHe+YEIqoJlaQc JfKYlbCoubz+02E2A6bFD9+BvCY0LBbEj5POwyKGiDMjHKCGuzSuDRbCn0Mz4kCa7nFMF5Jv piC+JemRdiBd6102ThqgIsyGEBXuf1sy0QIVyXgaqr9O2b/0VoXpQId7yY7OJuYYxs7kQoXI 6WzSMpmuXGkmfxOgbc/L6YbzB0JOriX0iRClxu4dEUg8Bs2pNnr6huY2Ft+qb41RzCJvvMyu gS32LfN0bTZ6Qm2A8ayMtUQgnwZDSO23OKgQWZVglGliY3ezHZ6lVwC24Vjkmq/2yBSLakZE 6DZUjZzCW1nvtRK05ebyK6tofRsx8xB8pL/kcBb9nCuh70aLR+5cmE41X4O+MVJbwfP5s/RW 9BFSL3qgXuXso/3XuWTQjJJGgKhB6xXjMmb1J4q/h5IuVV4juv1Fem9sfmyrh+Wi5V1IzKI7 RPJ3KVb937eBgSENk53P0gUorwzUcO+ASEo3Z1cBKkJSPigDbeEjVfXQMzNt0oDRzpQqH2vp apo2jHnidWt8BsckuWZpxcZ9+/9obQ55DyVQHGiTN39hkETy3Emdnz1JVHTU0Q== Message-ID: <39e02324-eaa1-1aea-96d2-fba48483b6c0@redhat.com> Date: Tue, 14 Jul 2020 18:47:03 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200714151152.54760-1-liq3ea@163.com> Content-Language: en-US X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=205.139.110.120; envelope-from=philmd@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/14 01:42:04 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liq3ea@gmail.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 7/14/20 5:11 PM, Li Qiang wrote: > While 'make chekc', I got following error: > > root@ubuntu:~/qemu# ./tests/qtest/device-introspect-test > /x86_64/device/introspect/list: OK > /x86_64/device/introspect/list-fields: OK > /x86_64/device/introspect/none: > ================================================================= > ==53741==ERROR: LeakSanitizer: detected memory leaks > > Direct leak of 212 byte(s) in 20 object(s) allocated from: > #0 0x7f3b6319cb40 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40) > #1 0x7f3b62805ab8 in g_malloc (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x51ab8) > > SUMMARY: AddressSanitizer: 212 byte(s) leaked in 20 allocation(s). > tests/qtest/libqtest.c:166: kill_qemu() tried to terminate QEMU process but encountered exit status 1 (expected 0) > Aborted (core dumped) > > This is because the 'info qom-tree' path has a memory leak and qemu > exit 1. The leak is in 'qom_composition_compare'. This patch fixes this. > > Fixes: e8c9e65816f("qom: Make "info qom-tree" show children sorted") > Signed-off-by: Li Qiang > --- > qom/qom-hmp-cmds.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/qom/qom-hmp-cmds.c b/qom/qom-hmp-cmds.c > index 9ed8bb1c9f..3547d5ba4e 100644 > --- a/qom/qom-hmp-cmds.c > +++ b/qom/qom-hmp-cmds.c > @@ -96,8 +96,10 @@ static void print_qom_composition(Monitor *mon, Object *obj, int indent); > > static int qom_composition_compare(const void *a, const void *b, void *ignore) > { > - return g_strcmp0(a ? object_get_canonical_path_component(a) : NULL, > - b ? object_get_canonical_path_component(b) : NULL); > + g_autofree char *t1 = a ? object_get_canonical_path_component(a) : NULL; > + g_autofree char *t2 = b ? object_get_canonical_path_component(b) : NULL; > + > + return g_strcmp0(t1, t2); > } > > static int insert_qom_composition_child(Object *obj, void *opaque) > Ah you won the race with Markus: https://lists.gnu.org/archive/html/qemu-devel/2020-07/msg04740.html Reviewed-by: Philippe Mathieu-Daudé