Jann Horn <[email protected]> writes: > On Fri, Apr 15, 2016 at 10:35:20AM -0500, Eric W. Biederman wrote: >> +static inline bool is_dev_ptmx(struct inode *inode) >> +{ >> + return inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR); >> +} > > I'm not sure whether it matters, but I think a FUSE filesystem > should be able to create a fake device that passes this check. > fuse_init_inode() calls init_special_inode() with a user-supplied > rdev for character devices. Is that a problem?
It isn't a problem with fuse, and I don't think it is a real problem in general, but yes it would be good if that code had honored nodev mount options. Eric
