On Mon, Jun 14, 2021 at 01:04:21PM -0700, Kees Cook wrote:
> static ssize_t psblk_generic_blk_write(const char *buf, size_t bytes,
> loff_t pos)
> {
> /* Console/Ftrace backend may handle buffer until flush dirty zones */
> if (in_interrupt() || irqs_disabled())
> return -EBUSY;
> + return kernel_write(psblk_file, buf, bytes, &pos);
In which locking environments could that be called? The checks above
look like that thing could be called from just about any context;
could that happen when the caller is holding a page locked?
IOW, what are those checks really trying to do?
