diff -up ./lib/softoken/sdb.c.orig ./lib/softoken/sdb.c

--- ./lib/softoken/sdb.c.orig   2020-12-11 22:49:26.961726193 -0500

+++ ./lib/softoken/sdb.c        2020-12-11 23:01:30.739122494 -0500

@@ -690,8 +690,14 @@ sdb_openDB(const char *name, sqlite3 **s

         openFlags = SQLITE_OPEN_READONLY;

     } else {

         openFlags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;

+        /* btrfs and sqlite seem to incorrectly open readwrite.

+        * when the file is readonly explicitly reject that issue here */

+        if ((_NSSUTIL_Access(name, PR_ACCESS_EXISTS) == PR_SUCCESS)  && (_NSSUTIL_Access(name, PR_ACCESS_WRITE_OK) != PR_SUCCESS)) {

+            return SQLITE_READONLY;

+        }

     }

+

     /* Requires SQLite 3.5.0 or newer. */

     sqlerr = sqlite3_open_v2(name, sqlDB, openFlags, NULL);

     if (sqlerr != SQLITE_OK) {