From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46602) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dHpZe-0004fq-0l for qemu-devel@nongnu.org; Mon, 05 Jun 2017 06:49:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dHpZa-0006Mx-BX for qemu-devel@nongnu.org; Mon, 05 Jun 2017 06:49:26 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35415) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dHpZa-0006MD-1m for qemu-devel@nongnu.org; Mon, 05 Jun 2017 06:49:22 -0400 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v55AmZVr092665 for ; Mon, 5 Jun 2017 06:49:19 -0400 Received: from e06smtp14.uk.ibm.com (e06smtp14.uk.ibm.com [195.75.94.110]) by mx0a-001b2d01.pphosted.com with ESMTP id 2aw1fnt1q3-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 05 Jun 2017 06:49:19 -0400 Received: from localhost by e06smtp14.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 5 Jun 2017 11:49:17 +0100 From: QingFeng Hao Date: Mon, 5 Jun 2017 12:48:51 +0200 In-Reply-To: <20170605104851.61818-1-haoqf@linux.vnet.ibm.com> References: <20170605104851.61818-1-haoqf@linux.vnet.ibm.com> Message-Id: <20170605104851.61818-2-haoqf@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v1 1/1] qemu/migration: fix the double free problem on from_src_file List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, qemu-block@nongnu.org Cc: peterx@redhat.com, borntraeger@de.ibm.com, cornelia.huck@de.ibm.com, liujbjl@linux.vnet.ibm.com, kwolf@redhat.com, famz@redhat.com, QingFeng Hao In load_vmstate, mis->from_src_file is freed twice, the first free is by qemu_fclose, the second is by migration_incoming_state_destroy and it causes Illegal instruction exception. The fix is just to remove the first free. This problem is found by qemu-iotests case 068 since commit "660819b migration: shut src return path unconditionally". The error is: 068 1s ... - output mismatch (see 068.out.bad) --- tests/qemu-iotests/068.out 2017-05-06 01:00:26.417270437 +0200 +++ 068.out.bad 2017-06-03 13:59:55.360274640 +0200 @@ -6,6 +6,8 @@ QEMU X.Y.Z monitor - type 'help' for more information (qemu) savevm 0 (qemu) quit +./common.config: line 107: 242472 Illegal instruction (core dumped) ( if [ -n "${QEMU_NEED_PID}" ]; then + echo $BASHPID > "${QEMU_TEST_DIR}/qemu-${_QEMU_HANDLE}.pid"; +fi; exec "$QEMU_PROG" $QEMU_OPTIONS "$@" ) QEMU X.Y.Z monitor - type 'help' for more information -(qemu) quit -*** done +(qemu) *** done Signed-off-by: QingFeng Hao --- migration/savevm.c | 1 - 1 file changed, 1 deletion(-) diff --git a/migration/savevm.c b/migration/savevm.c index 9c320f59d0..853e14e34e 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2290,7 +2290,6 @@ int load_snapshot(const char *name, Error **errp) aio_context_acquire(aio_context); ret = qemu_loadvm_state(f); - qemu_fclose(f); aio_context_release(aio_context); migration_incoming_state_destroy(); -- 2.11.2