[libvirt] [PATCH 12/12] Prohibit unbounded arrays in XDR protocols

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; The use of <> is a security issue for RPC parameters, since a malicious client can set a huge array length causing arbitrary memory allocation in the daemon. It is also a robustness issue for RPC return values, because if the stream is corrupted, it can cause the client to also allocate arbitrary memory. Use a syntax-check rule to prohibit any use of <> Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- cfg.mk | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/cfg.mk b/cfg.mk index 23564f1..9a9616c 100644 --- a/cfg.mk +++ b/cfg.mk @@ -836,6 +836,12 @@ sc_prohibit_config_h_in_headers: halt='headers should not include <config.h>' \ $(_sc_search_regexp) +sc_prohibit_unbounded_arrays_in_rpc: + @prohibit='<>' \ + in_vc_files='\.x$$' \ + halt='Arrays in XDR must have a upper limit set for <NNN>' \ + $(_sc_search_regexp) + # We don't use this feature of maint.mk. prev_version_file = /dev/null -- 1.8.3.1