Merge tag 'for-4.20-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...

[linux] / fs / ioctl.c

diff --git a/fs/ioctl.c b/fs/ioctl.c
index 505275e..d64f622 100644 (file)
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -677,6 +677,9 @@ int do_vfs_ioctl(struct file *filp, unsigned int fd, unsigned int cmd,
                return ioctl_fiemap(filp, arg);
 
        case FIGETBSZ:
+               /* anon_bdev filesystems may not have a block size */
+               if (!inode->i_sb->s_blocksize)
+                       return -EINVAL;
                return put_user(inode->i_sb->s_blocksize, argp);
 
        case FICLONE: