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Mon, 28 Sep 2020 10:42:22 +0000 (GMT) Received: from [9.160.97.73] (unknown [9.160.97.73]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 28 Sep 2020 10:42:22 +0000 (GMT) Subject: Re: [PATCH] vfio-ccw: plug memory leak while getting region info To: Cornelia Huck References: <20200928101701.13540-1-cohuck@redhat.com> From: Eric Farman Autocrypt: addr=farman@linux.ibm.com; keydata= xsFNBF7EiEwBEADGG0EtNKnjp+kQfEVqlqxXoBHjnaQptFpMgxNlz2GtqOujY6nzEWnybIXY 63XUTmMS/tWUf2DTbNCNoWwumGM/I2Gj1uGyMnc4Q477BQlL/e2/9MRaut11rwHsi4zmWylc jO0eFTSLFA8yFBj9osT3uZzk5TwWkD8sf+rD916fFVk0G39uYEd5sjEzjeOf9/dwXyZpjJY6 api1pUHEw7weRvOnllJAfIKFz+KoR6d7ezvMF9zOYHF73FGeSVIYoIEUhA5Cdg60rSlTtHb2 cftex3/cEapvY5bK3CKJ33BVVK10Bht9XfVaA/AOcg/3o5ZbhSIwz4xScGsEVf/Yr368YMdr 3VkCZrmN2ppmVRz/RvAmCyItnmzoVDlSREA6Faw6S0x8Oi7lN0cKh2hy9VPcVupraXJZrdAh GtdU+jrJvSbpdsrX8F7K3RwynbiqGrqC0izGla04hhtei/uwthatglukuxep4PknDGbzijg8 Ef7A8t3qEVklUDrsnNPN5HbR9QQdeF0HuWsDTfILbZv1MICfOK3BCDeT5mJWaJCoQ2rbuljM e1hFSt+mr7GV4h6NcBE+uGIqDSzQORtyTo0uBV4et3cSE84JxOfXBMrj0TlL1855JaIoPWEN uhDRB/dHW8+Fumq2du5hLcaXPka+MO26cNVKVLF0/JjwMTZ9bQARAQABzSJFcmljIEZhcm1h biA8ZmFybWFuQGxpbnV4LmlibS5jb20+wsF/BBMBAgApBQJexIhMAhsDBQkDwmcABwsJCAcD AgEGFQgCCQoLBBYCAwECHgECF4AACgkQOCeyEnG/lWJZWg/+NIsaagBT0/xghgkxl6dExEZH xKZdT+LqjG7Tpyl0c88SxzwNrpjV2y8SKFW2xAwKRslfJj3dQyleVKgMg92oB4hmBT8WaKQy /wj8wY0vP1lG21UMkZVtPHqxJ/AXQ75OpcsUwGVgDlqxmq9w/SJ0Dek7mz2QRdPFIs7UsdgI wtNBZJ/vaOpHJ5uiawtl7Y5iuhXDBh7m/+XOwgiOrr0x4mBcCw/T0dmKpOiKW1Kq//+UBAnw +PvL0J1/4Xae4RLBGWwlq0KeYxSylTB1GlWO98/shJe7Ao4+Efl9cIpgR8fEPN462MArQ+Wt tWjyaaLED76l/8o6rS4+WhioKQeA9CztelMmqp4LGUKw/2AuMQggXomogoYKjxo5JA1xGeqY MVOvANVXfsjryKjfB5cS1ulDqQ6ssaFjzCMisOaRFCN9IQzKteShpMrNS/1SPnlucuQRoAmc DbT6huCoat/2s+sYjGvRSv9lfp4ynEnxsCLxy4pBF8FjSJ39Hwzm1yLTwcbCpHWr9mJcvbPe gbjVgnhevvNwbMJW8qMB6TUIXW0xqGFst1NUJcpmNnM5QW+3BS7oSJNlOYaRhBCi/cwPjAPk f2A4V1X1jkvR37BoKwdWKBfAhZxaDAWAxO67Khd/bfoYhABf2pEokFmMJDBaxDhu90FUVecR HgGcIy+qC0bOwE0EXs/xBwEIAMjgCwgrSIGN5tWcHDJyT1VYWKlBfC5N323OFWDT+RERmoKC SjO5dFALGl6JK9Wh/s8G5Tlq3FhnRgNhKh6BsxY0BVR6hSJVNmDCAULIT9EeEOwrUerPyLp1 M0HFnT/scbIkpDXiYyVW+9qnXN/WN7f/2xItWLAM8Nr2gRh/ncnhjG2h40zoQ7CXmYjok4zF ydq/896fOFUeaEyrkpD7f5GrxGn5Eyy1Fu1v4yL6enmcrtkCPJX1Wn/el4qdmCWOs37ckgre KP/y92/z+m5928Xt2RUy9GhCoMKV/WtQG8rGpXOKRvnhaMrXK23hiiXCZRA+5WN2QR1xwldc BbNq4jkAEQEAAcLCfgQYAQIACQUCXs/xBwIbAgEpCRA4J7IScb+VYsBdIAQZAQIABgUCXs/x BwAKCRC5YxtkvHVPqQOgB/47ODzRBF6TnD7CtbWdJoo8UIo5V3zoOaduAkgOgPxEfKomye+B nWyobRVS2vnphFNpJvsGiG6FpfOKw6/M5JmREQ2Io8a4tZgOxmPtiUeGzoyFsDqtH9oJ2+RO j2xEdFnFUgKXY1mIVnr8pgImfZjjZxUE0vaz80mJv9J7ldghzBvBlMuvB8swlR/P5MyfSoYJ /i2kNO8S62DIVmpxyhopKKzVCvdevrR+DwI4NTB165Rp24LZVzVUvMx8olfaVWBBJ9D0boJp AoNHQU4IAhsRnn4QxVohSPbB+inWxXkBpSu7zXpinKAooUXUC4PWOBXquoiv7j6FpK/m1RF2 R8qNJ7MP/jqNUhre5ZNf6A86vKWdmq1Y8T674g6PE83hIgmk8N1gpSRClIBH7wclNNpJurFn m1NN7hY3E1qePonIPdtP6q+XGAoPWLxTZviy2UwnUNbc84UplyqQTSpZl1CjWzmC8ULUuGYz 0rno5QOfp+07oUQgeG9m8Pa9tw0mQnRYEQF8mdQLR1LZQM6jg709SbnsjL+WhaMgjKoFjrC+ BYByl7frg8Ga3cF12qL81eyqyqRt9HlC/mcOdoEyAz+hjUl4xwdQqccFHXQ1ps+F7LZOwKNB pSxQhRv197tJMBaccIPmGTEuK8cCxjy4Yb+yNrJKKT2e5/ZwshiE0xMCr66a/Ru/PMi7Pp7l 2bN8Si191w3LydoA+L7cnpQGu8Ig1qsy1OgIFL1+gEIlK0YIwkdTih/DNiwu9Vo83B0lFGkp q0GQBKpFZOSKPWhmpyGQjnsX8JZnI4z7Xb6hTCQcuj0jdjVqVPtQYcHS6wCeQvR6bAr8T+3H HugjPX5iWL3pDPF45fJAFqRx3pRyo3kewjYpMjdkMZFeiCtioNUe3MGIFT1keNYI7+lN9nym DJjN6SL/ou1RmyPbYN8UbrZf4pnznNp+EPU8HLsyZcXBjrAJsUIHzBXzKpzAid4hjR9173tj GUMe3n9mjEOpz895uS+WdnAJ/67YjHTzhjeOvCDUEkQ4zsBNBF7P8SABCAC/Q0qm5QmeNgJQ Ej6c6DnBMOvOSwd1qpLHUT7qSUypSLc7da6xz+2vrLgVzcqIOtjeWjUDA9WBTs5xTPbtq/Ya X6DPiY8p38XQAJ+a9W/GtPeSmzCtEZrzG0pozfsRDQP7kyVrXXAxL2h4bj9YGphiiYMEhchM YJyF3VdO/XzBCLSkQVmG0KvD0e+0VvennjQjVpsi48QtUjqVaMkVX9bUVlABV31cTzm2BUDc eJFXZxqgQSwOKFnDgYymi4YebWut00VGQjW+/SxVPOaANAb28l5kT7y5BYtG1TbbeBgXt/Sq cUuqkPm/i88qlWqJ3+Vk/eGKIErJ56x34HAtmjBDABEBAAHCwV8EGAECAAkFAl7P8SACGwwA CgkQOCeyEnG/lWJPnQ/+LJPueYf1/AeqqNz4r2OIZ2zmCWfEpkFnrOjdkYwEltLn5Aocn7UK saSy5QLnqi7lghqXD56sNa7iz6rBrLWLBxxcsZkKcxed4G0knurc0tT2HcRp7zr8I+69Nv2z IGX5J/+HfT5VZ/UuWtd7EIsB0cjS2p4epg45SqwTs+2YFJFWvrnGa82wz2kn3qo++FMGoLpo g4pZixyvFP5sAV2vDzTWFk+WHokh7hu7SfgNIvuWmvLd2LUTrie0Mu3L06LMbmGAN+/mgeED uL6eI2QD500Zn+mnQm+Yyssjc832mJ9M5u2N2lu2FIR0aqaj3npyO0E4U4E9ftoVakktiHgj C+frRwEOdfO/UQgYtnpcxruhR/P0LfDABIswGtHYjgOEowSx+NA5+b+M5qTRWNjHSceeaIqF B2fUlEP/pfqexdXakkOL/w/Jz5YxCM45LdvArhVPn6GIvC127wFfFNTEV6hR0n4H58venlyM /HeaCx4x6DjvxfXw50+V37TA5Np9dlvAx4G1VTwWcO/bwsebfnE9lKKf7GOEDV0kauN071ve F52YQgFMAOyd+6nx9laZei0tx3NywCemO7puZ8kecla/ZZ2FqMMOoxefGBryFLFLuo38QHuG GmSZ8+uivkSx+PJ/h/7ZSAdrUzIbBk4SLVYTR4HzQ7U9ukgRMl78GiM= Message-ID: Date: Mon, 28 Sep 2020 06:42:22 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20200928101701.13540-1-cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-09-28_07:2020-09-24, 2020-09-28 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=999 suspectscore=2 priorityscore=1501 clxscore=1011 lowpriorityscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009280080 Received-SPF: pass client-ip=148.163.158.5; envelope-from=farman@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/28 06:42:25 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.011, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.462, 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: Alex Williamson , qemu-s390x@nongnu.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 9/28/20 6:17 AM, Cornelia Huck wrote: > vfio_get_dev_region_info() unconditionally allocates memory > for a passed-in vfio_region_info structure (and does not re-use > an already allocated structure). Therefore, we have to free > the structure we pass to that function in vfio_ccw_get_region() > for every region we successfully obtained information for. Ah, yes. This makes sense. A little messy, but hopefully we're done with new regions for the time being. > > Reported-by: Alex Williamson > Fixes: 8fadea24de4e ("vfio-ccw: support async command subregion") > Fixes: 46ea3841edaf ("vfio-ccw: Add support for the schib region") > Fixes: f030532f2ad6 ("vfio-ccw: Add support for the CRW region and IRQ") > Signed-off-by: Cornelia Huck Reviewed-by: Eric Farman > --- > hw/vfio/ccw.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c > index ff7f36977994..d2755d7fc5ca 100644 > --- a/hw/vfio/ccw.c > +++ b/hw/vfio/ccw.c > @@ -491,6 +491,7 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) > > vcdev->io_region_offset = info->offset; > vcdev->io_region = g_malloc0(info->size); > + g_free(info); > > /* check for the optional async command region */ > ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, > @@ -503,6 +504,7 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) > } > vcdev->async_cmd_region_offset = info->offset; > vcdev->async_cmd_region = g_malloc0(info->size); > + g_free(info); > } > > ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, > @@ -515,6 +517,7 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) > } > vcdev->schib_region_offset = info->offset; > vcdev->schib_region = g_malloc(info->size); > + g_free(info); > } > > ret = vfio_get_dev_region_info(vdev, VFIO_REGION_TYPE_CCW, > @@ -528,9 +531,9 @@ static void vfio_ccw_get_region(VFIOCCWDevice *vcdev, Error **errp) > } > vcdev->crw_region_offset = info->offset; > vcdev->crw_region = g_malloc(info->size); > + g_free(info); > } > > - g_free(info); > return; > > out_err: >