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-rw-r--r--lib/libexpat/lib/xmltok_impl.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/libexpat/lib/xmltok_impl.c b/lib/libexpat/lib/xmltok_impl.c
index 12688192522..8154c1afa92 100644
--- a/lib/libexpat/lib/xmltok_impl.c
+++ b/lib/libexpat/lib/xmltok_impl.c
@@ -1748,6 +1748,9 @@ PREFIX(updatePosition)(const ENCODING *enc,
switch (BYTE_TYPE(enc, ptr)) {
#define LEAD_CASE(n) \
case BT_LEAD ## n: \
+ if (end - ptr < n) { \
+ return; \
+ } \
ptr += n; \
break;
LEAD_CASE(2) LEAD_CASE(3) LEAD_CASE(4)