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[83.59.162.106]) by smtp.gmail.com with ESMTPSA id k16sm12033456wmi.5.2020.10.13.03.03.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Oct 2020 03:03:16 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH] hw/core/qdev-properties-system: Rewrite set_pci_host_devaddr using GLib Date: Tue, 13 Oct 2020 12:03:15 +0200 Message-Id: <20201013100315.3554421-1-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/13 03:04:27 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Richard Henderson , Klaus Herman , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?b?w6k=?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" set_pci_host_devaddr() is hard to follow, thus bug-prone. We indeed introduced a bug in commit bccb20c49df, as the same line might be used to parse a bus (up to 0xff) or a slot (up to 0x1f). Instead of making things worst, rewrite using g_strsplit(). Fixes: bccb20c49df ("Use qemu_strtoul() in set_pci_host_devaddr()") Reported-by: Klaus Herman Signed-off-by: Philippe Mathieu-Daudé --- hw/core/qdev-properties-system.c | 61 ++++++++++++++------------------ 1 file changed, 27 insertions(+), 34 deletions(-) diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c index 49bdd125814..e6e081efd58 100644 --- a/hw/core/qdev-properties-system.c +++ b/hw/core/qdev-properties-system.c @@ -878,11 +878,11 @@ static void set_pci_host_devaddr(Object *obj, Visitor *v, const char *name, DeviceState *dev = DEVICE(obj); Property *prop = opaque; PCIHostDeviceAddress *addr = qdev_get_prop_ptr(dev, prop); - char *str, *p; - const char *e; + g_autofree char *str = NULL; + g_autofree char **col_s0 = NULL; + g_autofree char **dot_s = NULL; + char **col_s; unsigned long val; - unsigned long dom = 0, bus = 0; - unsigned int slot = 0, func = 0; if (dev->realized) { qdev_prop_set_after_realize(dev, name, errp); @@ -893,57 +893,50 @@ static void set_pci_host_devaddr(Object *obj, Visitor *v, const char *name, return; } - p = str; - if (qemu_strtoul(p, &e, 16, &val) < 0 || val > 0xffff || e == p) { + col_s = col_s0 = g_strsplit(str, ":", 3); + if (!col_s || !col_s[0] || !col_s[1]) { goto inval; } - if (*e != ':') { - goto inval; - } - bus = val; - p = (char *)e + 1; - if (qemu_strtoul(p, &e, 16, &val) < 0 || val > 0x1f || e == p) { - goto inval; - } - if (*e == ':') { - dom = bus; - bus = val; - p = (char *)e + 1; - if (qemu_strtoul(p, &e, 16, &val) < 0 || val > 0x1f || e == p) { + /* domain */ + if (col_s[2]) { + if (qemu_strtoul(col_s[0], NULL, 16, &val) < 0 || val > 0xffff) { goto inval; } + addr->domain = val; + col_s++; + } else { + addr->domain = 0; } - slot = val; - if (*e != '.') { + /* bus */ + if (qemu_strtoul(col_s[0], NULL, 16, &val) < 0 || val > 0xff) { goto inval; } - p = (char *)e + 1; - if (qemu_strtoul(p, &e, 10, &val) < 0 || val > 7 || e == p) { - goto inval; - } - func = val; + addr->bus = val; - if (bus > 0xff) { + /* . */ + dot_s = g_strsplit(col_s[1], ".", 2); + if (!dot_s || !dot_s[0] || !dot_s[1]) { goto inval; } - if (*e) { + /* slot */ + if (qemu_strtoul(dot_s[0], NULL, 16, &val) < 0 || val > 0x1f) { goto inval; } + addr->slot = val; - addr->domain = dom; - addr->bus = bus; - addr->slot = slot; - addr->function = func; + /* func */ + if (qemu_strtoul(dot_s[1], NULL, 10, &val) < 0 || val > 7) { + goto inval; + } + addr->function = val; - g_free(str); return; inval: error_set_from_qdev_prop_error(errp, EINVAL, dev, prop, str); - g_free(str); } const PropertyInfo qdev_prop_pci_host_devaddr = {