From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36742) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAZl0-0005C3-Ra for qemu-devel@nongnu.org; Thu, 02 Jul 2015 04:22:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZAZkz-0003XD-Tg for qemu-devel@nongnu.org; Thu, 02 Jul 2015 04:22:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:60865) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAZkz-0003Wu-N2 for qemu-devel@nongnu.org; Thu, 02 Jul 2015 04:22:05 -0400 From: "Dr. David Alan Gilbert (git)" Date: Thu, 2 Jul 2015 09:22:03 +0100 Message-Id: <1435825323-2806-1-git-send-email-dgilbert@redhat.com> Subject: [Qemu-devel] [PATCH] check_section_footers: Check the correct section_id List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: amit.shah@redhat.com, borntraeger@de.ibm.com, quintela@redhat.com From: "Dr. David Alan Gilbert" The section footers check was incorrectly checking the section_id in the SaveStateEntry not the LoadStateEntry. These can validly be different if the two QEMU instances have instantiated their devices in a different order. The test only cares that we're finishing the same section we started, and hence it's the LoadStateEntry that we care about. Signed-off-by: Dr. David Alan Gilbert Reported-by: Christian Borntraeger --- migration/savevm.c | 74 +++++++++++++++++++++++++++--------------------------- 1 file changed, 37 insertions(+), 37 deletions(-) diff --git a/migration/savevm.c b/migration/savevm.c index 1a9b00b..acbad9c 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -653,41 +653,6 @@ static void save_section_footer(QEMUFile *f, SaveStateEntry *se) } } -/* - * Read a footer off the wire and check that it matches the expected section - * - * Returns: true if the footer was good - * false if there is a problem (and calls error_report to say why) - */ -static bool check_section_footer(QEMUFile *f, SaveStateEntry *se) -{ - uint8_t read_mark; - uint32_t read_section_id; - - if (skip_section_footers) { - /* No footer to check */ - return true; - } - - read_mark = qemu_get_byte(f); - - if (read_mark != QEMU_VM_SECTION_FOOTER) { - error_report("Missing section footer for %s", se->idstr); - return false; - } - - read_section_id = qemu_get_be32(f); - if (read_section_id != se->section_id) { - error_report("Mismatched section id in footer for %s -" - " read 0x%x expected 0x%x", - se->idstr, read_section_id, se->section_id); - return false; - } - - /* All good */ - return true; -} - bool qemu_savevm_state_blocked(Error **errp) { SaveStateEntry *se; @@ -989,6 +954,41 @@ struct LoadStateEntry { int version_id; }; +/* + * Read a footer off the wire and check that it matches the expected section + * + * Returns: true if the footer was good + * false if there is a problem (and calls error_report to say why) + */ +static bool check_section_footer(QEMUFile *f, LoadStateEntry *le) +{ + uint8_t read_mark; + uint32_t read_section_id; + + if (skip_section_footers) { + /* No footer to check */ + return true; + } + + read_mark = qemu_get_byte(f); + + if (read_mark != QEMU_VM_SECTION_FOOTER) { + error_report("Missing section footer for %s", le->se->idstr); + return false; + } + + read_section_id = qemu_get_be32(f); + if (read_section_id != le->section_id) { + error_report("Mismatched section id in footer for %s -" + " read 0x%x expected 0x%x", + le->se->idstr, read_section_id, le->section_id); + return false; + } + + /* All good */ + return true; +} + void loadvm_free_handlers(MigrationIncomingState *mis) { LoadStateEntry *le, *new_le; @@ -1082,7 +1082,7 @@ int qemu_loadvm_state(QEMUFile *f) " device '%s'", instance_id, idstr); goto out; } - if (!check_section_footer(f, le->se)) { + if (!check_section_footer(f, le)) { ret = -EINVAL; goto out; } @@ -1109,7 +1109,7 @@ int qemu_loadvm_state(QEMUFile *f) section_id, le->se->idstr); goto out; } - if (!check_section_footer(f, le->se)) { + if (!check_section_footer(f, le)) { ret = -EINVAL; goto out; } -- 2.4.3