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

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The kernel might start returning -EINVAL when trying to open pidfd's
for kernel threads so let's not try to open pidfd's for kernel threads.
This commit is contained in:
Daan De Meyer 2024-07-31 13:38:50 +02:00
parent 0fbb569de1
commit ead48ec35c
1 changed files with 3 additions and 1 deletions
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4
src/basic/cgroup-util.c
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@ -149,7 +149,9 @@ int cg_read_pidref(FILE *f, PidRef *ret, CGroupFlags flags) {
if (pid == 0)
return -EREMOTE;
if (FLAGS_SET(flags, CGROUP_NO_PIDFD)) {
/* 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) {
*ret = PIDREF_MAKE_FROM_PID(pid);
return 1;
}