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-rw-r--r--main/SAPI.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/main/SAPI.c b/main/SAPI.c
index 94e924c626..480932fd8a 100644
--- a/main/SAPI.c
+++ b/main/SAPI.c
@@ -545,6 +545,10 @@ SAPI_API int sapi_header_op(sapi_header_op_enum op, void *arg TSRMLS_DC)
case SAPI_HEADER_REPLACE:
case SAPI_HEADER_ADD: {
sapi_header_line *p = arg;
+
+ if (!p->line || !p->line_len) {
+ return FAILURE;
+ }
header_line = p->line;
header_line_len = p->line_len;
http_response_code = p->response_code;