afs: Check for invalid afs_fakestat_enable values

[openafs.git] / src / afs / afs_call.c

diff --git a/src/afs/afs_call.c b/src/afs/afs_call.c
index 1c83865..d2f9b07 100644 (file)
--- a/src/afs/afs_call.c
+++ b/src/afs/afs_call.c
@@ -1289,8 +1289,14 @@ afs_syscall_call(long parm, long parm2, long parm3,
     else if (parm == AFSOP_SET_DYNROOT) {
        code = afs_SetDynrootEnable(parm2);
     } else if (parm == AFSOP_SET_FAKESTAT) {
-       afs_fakestat_enable = parm2;
-       code = 0;
+       if (parm2 >= 0 && parm2 <= 2) {
+           afs_fakestat_enable = parm2;
+           code = 0;
+       } else {
+           afs_warn("afs: afsd gave us unknown fakestat value %ld (are afsd "
+                    "and libafs running the same version?\n", parm2);
+           code = EINVAL;
+       }
     } else if (parm == AFSOP_SET_BACKUPTREE) {
        afs_bkvolpref = parm2;
     } else if (parm == AFSOP_SET_RXPCK) {