[PATCH 6/6] exec: use force_uaccess_begin during exec and exit

[Christoph Hellwig]

On Tue, Jul 14, 2020 at 10:33:05PM -0500, Eric W. Biederman wrote:
> Christoph Hellwig <hch at lst.de> writes:
> 
> > Both exec and exit want to ensure that the uaccess routines actually do
> > access user pointers.  Use the newly added force_uaccess_begin helper
> > instead of an open coded set_fs for that to prepare for kernel builds
> > where set_fs() does not exist.
> 
> Acked-by: "Eric W. Biederman" <ebiederm at xmission.com>
> 
> Have you played with a tree with all of your patches
> and placing force_uaccess_begin in init/main.c:start_kernel?

No, I have converted the early boot code to not require KERNEL_DS
and except for a pending network item remove set_fs entirely.  Older
series here, will need some rework:

http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/set_fs-removal