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Avoid segfault in CloseWellKnownConnections when using -displayfd 

When -displayfd is looping through the possible display ids to use,
if it can't open all the listening sockets for one (say when :0 is
already in use), it calls CloseWellKnownConnections to close all
the ListenTransConns entries before the point that ListenTransFds
was allocated & initialized, so CloseWellKnownConnections would
segfault trying to read entries from a NULL ListenTransFds pointer.

Introduced by commit 7b02f0b8

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Alan Coopersmith 2016-01-01 17:34:41 -08:00
parent edcb6426f2
commit ba71b69f94
1 changed files with 2 additions and 1 deletions
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os/connection.c
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@ -523,6 +523,7 @@ CloseWellKnownConnections(void)
if (ListenTransConns[i] != NULL) { if (ListenTransConns[i] != NULL) {
_XSERVTransClose(ListenTransConns[i]); _XSERVTransClose(ListenTransConns[i]);
ListenTransConns[i] = NULL; ListenTransConns[i] = NULL;
if (ListenTransFds != NULL)
RemoveNotifyFd(ListenTransFds[i]); RemoveNotifyFd(ListenTransFds[i]);
} }
} }