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[Qemu-devel] [PATCH] Migration+TLS: Fix crash due to double cleanup
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [PATCH] Migration+TLS: Fix crash due to double cleanup |
Date: |
Mon, 30 Apr 2018 19:59:43 +0100 |
From: "Dr. David Alan Gilbert" <address@hidden>
During a TLS connect we see:
migration_channel_connect calls
migration_tls_channel_connect
(calls after TLS setup)
migration_channel_connect
My previous error handling fix made migration_channel_connect
call migrate_fd_connect in all cases; unfortunately the above
means it gets called twice and crashes doing double cleanup.
Fixes: 688a3dcba98
Reported-by: Peter Krempa <address@hidden>
Signed-off-by: Dr. David Alan Gilbert <address@hidden>
---
migration/channel.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/migration/channel.c b/migration/channel.c
index c5eaf0fa0e..7a32b5aca4 100644
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -71,6 +71,15 @@ void migration_channel_connect(MigrationState *s,
!object_dynamic_cast(OBJECT(ioc),
TYPE_QIO_CHANNEL_TLS)) {
migration_tls_channel_connect(s, ioc, hostname, &error);
+
+ if (!error) {
+ /* tls_channel_connect will call back to this
+ * function after the TLS handshake,
+ * so we mustn't call migrate_fd_connect until then
+ */
+
+ return;
+ }
} else {
QEMUFile *f = qemu_fopen_channel_output(ioc);
--
2.17.0
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