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31 lines
1.3 KiB
31 lines
1.3 KiB
From 418d2192e0e2bcdc7fe10f4f331231a2ad5a5c00 Mon Sep 17 00:00:00 2001
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From: Daan De Meyer <daan.j.demeyer@gmail.com>
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Date: Wed, 31 Jul 2024 13:38:50 +0200
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Subject: [PATCH] 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
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for kernel threads so let's not try to open pidfd's for kernel threads.
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(cherry picked from commit ead48ec35c863650944352a3455f26ce3b393058)
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Resolves: RHEL-55746
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---
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src/basic/cgroup-util.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
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index 1fc83a656a..b0fe0ecbe8 100644
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--- a/src/basic/cgroup-util.c
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+++ b/src/basic/cgroup-util.c
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@@ -149,7 +149,9 @@ int cg_read_pidref(FILE *f, PidRef *ret, CGroupFlags flags) {
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if (pid == 0)
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return -EREMOTE;
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- if (FLAGS_SET(flags, CGROUP_NO_PIDFD)) {
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+ /* We might read kernel thread pids from cgroup.procs for which we cannot create a pidfd so
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+ * catch those and don't try to create a pidfd for them. */
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+ if (FLAGS_SET(flags, CGROUP_NO_PIDFD) || pid_is_kernel_thread(pid) > 0) {
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*ret = PIDREF_MAKE_FROM_PID(pid);
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return 1;
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}
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