From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50435) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fVBY3-00086q-GJ for qemu-devel@nongnu.org; Tue, 19 Jun 2018 03:59:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fVBY2-0008Jv-QG for qemu-devel@nongnu.org; Tue, 19 Jun 2018 03:59:31 -0400 From: Zheng Xiang Date: Tue, 19 Jun 2018 15:58:21 +0800 Message-ID: <20180619075821.9884-1-zhengxiang9@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH] target-arm: fix a segmentation fault due to illegal memory access List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: zhaoshenglong@huawei.com, peter.maydell@linaro.org, Zheng Xiang From: Zheng Xiang The elements of kvm_devices_head list are freed in kvm_arm_machine_init_done(), but we still access these illegal memory in kvm_arm_devlistener_del(). This will cause segment fault when booting guest with MALLOC_PERTURB_=1. Signed-off-by: Zheng Xiang --- target/arm/kvm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 98f5006..5bf41e1 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -256,6 +256,7 @@ static void kvm_arm_machine_init_done(Notifier *notifier, void *data) kvm_arm_set_device_addr(kd); } memory_region_unref(kd->mr); + QSLIST_REMOVE_HEAD(&kvm_devices_head, entries); g_free(kd); } memory_listener_unregister(&devlistener); -- 1.8.3.1