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cgroup: Fixes for v7.3-rc4

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- With local event accounting, a fork rejected by the pids controller
   updated pids.events without notifying its pollers.
 
 - A cgroup selftest failed to compile with fortification enabled because
   an O_TMPFILE open lacked its mode argument.
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Merge tag 'cgroup-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - With local event accounting, a fork rejected by the pids controller
   updated pids.events without notifying its pollers

 - A cgroup selftest failed to compile with fortification enabled
   because an O_TMPFILE open lacked its mode argument

* tag 'cgroup-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup/pids: Restore pids.events notifications in local mode
  selftests: cgroup: give the O_TMPFILE open in get_temp_fd() a mode
This commit is contained in:
Linus Torvalds 2026-09-24 14:26:12 -07:00
commit e8dfd03a1c
2 changed files with 6 additions and 1 deletions
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5
kernel/cgroup/pids.c
View File

@ -253,6 +253,11 @@ static void pids_event(struct pids_cgroup *pids_forking,
}
if (!cgroup_subsys_on_dfl(pids_cgrp_subsys) ||
cgrp_dfl_root.flags & CGRP_ROOT_PIDS_LOCAL_EVENTS) {
/*
* pids.events reports the local counter on legacy hierarchies
* and when pids_localevents is enabled.
*/
cgroup_file_notify(&p->events_file);
cgroup_file_notify(&p->events_local_file);
return;
}

2
tools/testing/selftests/cgroup/test_memcontrol.c
View File

@ -30,7 +30,7 @@ static int page_size;
int get_temp_fd(void)
{
return open(".", O_TMPFILE | O_RDWR | O_EXCL);
return open(".", O_TMPFILE | O_RDWR | O_EXCL, 0600);
}
int alloc_pagecache(int fd, size_t size)