[PATCH 4/6] libxtables: set clone's initial data to NULL

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Avoid a crash in xs_init_match when a clone's m->udata points at the
parent.

Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxx>
---
 iptables/xtables.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/iptables/xtables.c b/iptables/xtables.c
index b05df97..1a5e568 100644
--- a/iptables/xtables.c
+++ b/iptables/xtables.c
@@ -632,6 +632,7 @@ xtables_find_match(const char *name, enum xtables_tryload tryload,
 			/* Second and subsequent clones */
 			clone = xtables_malloc(sizeof(struct xtables_match));
 			memcpy(clone, ptr, sizeof(struct xtables_match));
+			clone->udata = NULL;
 			clone->mflags = 0;
 			/* This is a clone: */
 			clone->next = clone;
-- 
1.7.3.4

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