From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Wed, 21 Aug 2024 09:25:46 +0000 (+0200)
Subject: Revert "cgroup-util: Don't try to open pidfd for kernel threads"
X-Git-Tag: v257-rc1~668
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ce69e06615e69692a6d02d447acfd77f5d44631;p=thirdparty%2Fsystemd.git

Revert "cgroup-util: Don't try to open pidfd for kernel threads"

The kernel patch was reverted so let's try again to open pidfds
for kernel threads.

This reverts commit ead48ec35c863650944352a3455f26ce3b393058.
---

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 18bc0ff2aed..b3cd2c27a6f 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -149,9 +149,7 @@ int cg_read_pidref(FILE *f, PidRef *ret, CGroupFlags flags) {
                 if (pid == 0)
                         return -EREMOTE;
 
-                /* We might read kernel thread pids from cgroup.procs for which we cannot create a pidfd so
-                 * catch those and don't try to create a pidfd for them. */
-                if (FLAGS_SET(flags, CGROUP_NO_PIDFD) || pid_is_kernel_thread(pid) > 0) {
+                if (FLAGS_SET(flags, CGROUP_NO_PIDFD)) {
                         *ret = PIDREF_MAKE_FROM_PID(pid);
                         return 1;
                 }