diff options
| author | Li Zhijian <lizhijian@cn.fujitsu.com> | 2021-05-19 14:47:40 +0800 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2021-05-26 18:39:32 +0100 |
| commit | efb208dc9c3f1e881aecff21fb1c7a7b6b869480 (patch) | |
| tree | 949af78ec3613c7db4cfeb7b0a6bab47f95f93e8 | |
| parent | bf99f30bc3420f2f4b82f7f827fb93197d33c017 (diff) | |
migration/rdma: Fix cm_event used before being initialized
A segmentation fault was triggered when i try to abort a postcopy + rdma
migration.
since rdma_ack_cm_event releases a uninitialized cm_event in these case.
like below:
2496 ret = rdma_get_cm_event(rdma->channel, &cm_event);
2497 if (ret) {
2498 perror("rdma_get_cm_event after rdma_connect");
2499 ERROR(errp, "connecting to destination!");
2500 rdma_ack_cm_event(cm_event); <<<< cause segmentation fault
2501 goto err_rdma_source_connect;
2502 }
Refer to the rdma_get_cm_event() code, cm_event will be
updated/changed only if rdma_get_cm_event() returns 0. So it's okey to
remove the ack in error patch.
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Message-Id: <20210519064740.10828-1-lizhijian@cn.fujitsu.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
| -rw-r--r-- | migration/rdma.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/migration/rdma.c b/migration/rdma.c index 00eac34232..41726cc74a 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2497,7 +2497,6 @@ static int qemu_rdma_connect(RDMAContext *rdma, Error **errp) if (ret) { perror("rdma_get_cm_event after rdma_connect"); ERROR(errp, "connecting to destination!"); - rdma_ack_cm_event(cm_event); goto err_rdma_source_connect; } |