tcpdump -i crash

[Miroslav Lichvar <mlichvar () redhat com>]

Hi,

I've received a bug report that tcpdump crashes when -i option is
used and there are no interfaces available.

https://bugzilla.redhat.com/show_bug.cgi?id=497819

This should fix it:

--- a/tcpdump.c
+++ b/tcpdump.c
@@ -655,6 +655,8 @@ main(int argc, char **argv)
                                if (pcap_findalldevs(&devpointer, ebuf) < 0)
                                        error("%s", ebuf);
                                else {
+                                       if (devpointer == NULL)
+                                               error("Invalid adapter index");
                                        for (i = 0; i < devnum-1; i++){
                                                devpointer = devpointer->next;
                                                if (devpointer == NULL)


Thanks,

-- 
Miroslav Lichvar
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