On Mon, Jun 15, 2020 at 02:12:49PM +0200, Christoph Hellwig wrote: > We still need to check if the fѕ is open write, even for the low-level > helper. Do we need the analogous check for FMODE_READ in the __kernel_read() patch? > @@ -505,6 +505,8 @@ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t > const char __user *p; > ssize_t ret; > > + if (!(file->f_mode & FMODE_WRITE)) > + return -EBADF; > if (!(file->f_mode & FMODE_CAN_WRITE)) > return -EINVAL; > > -- > 2.26.2 >
