tree 784d1ad6a4c959de0fe07753745568a42eb19ab7
parent 753550eb0ce1fea4b5cbd989f2e06ef80b2feb28
author Eric W. Biederman <ebiederm@xmission.com> 1649704554 -0500
committer Eric W. Biederman <ebiederm@xmission.com> 1651932119 -0500

fork: Stop allowing kthreads to call execve

Now that kernel_execve is no longer called from kernel threads stop
supporting kernel threads calling kernel_execve.

Remove the code for converting a kthread to a normal thread in execve.

Document the restriction that kthreads may not call kernel_execve by
having kernel_execve fail if called by a kthread.

Link: https://lkml.kernel.org/r/20220506141512.516114-7-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>