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Fix DNS script deleting a table element while iterating

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Doesn't typically cause any problems since the loop breaks after
deleting, except there's now an assert in debug builds catching
potential problems like this.
This commit is contained in:
Jon Siwek 2020-08-06 20:48:08 -07:00 • committed by Tim Wojtulewicz
parent f613cb0c68
commit fef4fda2f7
1 changed files with 8 additions and 1 deletions
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9
scripts/base/protocols/dns/main.zeek
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@ -285,12 +285,19 @@ hook set_session(c: connection, msg: dns_msg, is_query: bool) &priority=5
else
{
# Just pick an arbitrary, unpaired query.
local tid: count;
local found_one = F;
for ( trans_id, q in c$dns_state$pending_queries )
if ( Queue::len(q) > 0 )
{
c$dns_state$pending_query = pop_msg(c$dns_state$pending_queries, trans_id);
tid = trans_id;
found_one = T;
break;
}
if ( found_one )
c$dns_state$pending_query = pop_msg(c$dns_state$pending_queries, tid);
}
}
}