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-rw-r--r--src/expr/masq.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/expr/masq.c b/src/expr/masq.c
index 7c235d3..1c75ee9 100644
--- a/src/expr/masq.c
+++ b/src/expr/masq.c
@@ -190,6 +190,9 @@ static int nftnl_expr_masq_snprintf_default(char *buf, size_t len,
static int nftnl_expr_masq_snprintf(char *buf, size_t len, uint32_t type,
uint32_t flags, const struct nftnl_expr *e)
{
+ if (len)
+ buf[0] = '\0';
+
switch (type) {
case NFTNL_OUTPUT_DEFAULT:
return nftnl_expr_masq_snprintf_default(buf, len, e);