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-rw-r--r--xdiff-interface.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/xdiff-interface.c b/xdiff-interface.c
index ecfa05f616..cb67c1c42b 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -131,6 +131,9 @@ int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t co
mmfile_t a = *mf1;
mmfile_t b = *mf2;
+ if (mf1->size > MAX_XDIFF_SIZE || mf2->size > MAX_XDIFF_SIZE)
+ return -1;
+
trim_common_tail(&a, &b, xecfg->ctxlen);
return xdl_diff(&a, &b, xpp, xecfg, xecb);