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-rw-r--r--src/libutil/map.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/libutil/map.c b/src/libutil/map.c
index 0f622a209..e632fc871 100644
--- a/src/libutil/map.c
+++ b/src/libutil/map.c
@@ -275,11 +275,15 @@ read_map_file (struct rspamd_map *map, struct file_map_data *data)
tlen += r;
buf[r] = '\0';
remain = map->read_callback (map->pool, buf, r, &cbdata);
+
if (remain != NULL) {
/* copy remaining buffer to start of buffer */
rlen = r - (remain - buf);
memmove (buf, remain, rlen);
}
+ else {
+ rlen = 0;
+ }
}
if (remain != NULL && remain > buf) {