diff options
| -rw-r--r-- | fs/ext4/ioctl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 366a9b615bf0..7ce0fc40aec2 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -1394,6 +1394,10 @@ static int ext4_ioctl_set_tune_sb(struct file *filp, if (copy_from_user(¶ms, in, sizeof(params))) return -EFAULT; + if (strnlen(params.mount_opts, sizeof(params.mount_opts)) == + sizeof(params.mount_opts)) + return -E2BIG; + if ((params.set_flags & ~TUNE_OPS_SUPPORTED) != 0) return -EOPNOTSUPP; |