Oleg Nesterov 1cf2e88e06 Revert "pid: make __task_pid_nr_ns(ns => NULL) safe for zombie callers" ...

This reverts commit abdfd4948e.

The changelog in this commit explains why it is not easy to avoid ns == NULL
when the caller is exiting, but pid_vnr() is equally unsafe in this case.

However, commit 006568ab4c ("pid: Add a judgment for ns null in pid_nr_ns")
already added the ns != NULL check in pid_nr_ns(), so we can remove the same
check from __task_pid_nr_ns().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: https://patch.msgid.link/20251015123613.GA9456@redhat.com
Signed-off-by: Christian Brauner <brauner@kernel.org>

2026-02-10 11:39:30 +01:00

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