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io: avoid double-free when closing QIOChannelBuffer

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The QIOChannelBuffer's close implementation will free
the internal data buffer. It failed to reset the pointer
to NULL though, so when the object is later finalized
it will free it a second time with predictable crash.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <1461751518-12128-3-git-send-email-berrange@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-04-27 11:04:52 +01:00 committed by Amit Shah
parent 1fd791f007
commit d656ec5ea8
1 changed files with 1 additions and 0 deletions
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io/channel-buffer.c
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@ -140,6 +140,7 @@ static int qio_channel_buffer_close(QIOChannel *ioc,
QIOChannelBuffer *bioc = QIO_CHANNEL_BUFFER(ioc);
g_free(bioc->data);
bioc->data = NULL;
bioc->capacity = bioc->usage = bioc->offset = 0;
return 0;