workaround memory sanitizer FD_ZERO false positives

1 files changed, 7 insertions, 0 deletions

diff --git a/dbutil.h b/dbutil.h
index 7d1c3e1..7cb9d68 100644
--- a/dbutil.h
+++ b/dbutil.h
@@ -88,4 +88,11 @@ char * expand_homedir_path(const char *inpath);
 
 void fsync_parent_dir(const char* fn);
 
+#if DROPBEAR_MSAN
+/* FD_ZERO seems to leave some memory uninitialized. clear it to avoid false positives */
+#define DROPBEAR_FD_ZERO(fds) do { memset((fds), 0x0, sizeof(fd_set)); FD_ZERO(fds); } while(0)
+#else
+#define DROPBEAR_FD_ZERO(fds) FD_ZERO(fds)
+#endif
+
 #endif /* DROPBEAR_DBUTIL_H_ */