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cgroup: rstat: call cgroup_rstat_updated_list with cgroup_rstat_lock

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The commit 093c8812de ("cgroup: rstat: Cleanup flushing functions and
locking") during cleanup accidentally changed the code to call
cgroup_rstat_updated_list() without cgroup_rstat_lock which is required.
Fix it.

Fixes: 093c8812de ("cgroup: rstat: Cleanup flushing functions and locking")
Reported-by: Jakub Kicinski <[email protected]>
Reported-by: Breno Leitao <[email protected]>
Reported-by: Venkat Rao Bagalkote <[email protected]>
Closes: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Shakeel Butt <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
This commit is contained in:
Shakeel Butt authored and Tejun Heo committed 2025-04-01 07:33:26 -10:00
1 parent e8a457b735
commit 7d6c63c319
1 file changed
+2 -1
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kernel/cgroup/rstat.c
+2 -1
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@@ -318,10 +318,11 @@ __bpf_kfunc void cgroup_rstat_flush(struct cgroup *cgrp)
might_sleep();
for_each_possible_cpu(cpu) {
struct cgroup *pos = cgroup_rstat_updated_list(cgrp, cpu);
struct cgroup *pos;
/* Reacquire for each CPU to avoid disabling IRQs too long */
__cgroup_rstat_lock(cgrp, cpu);
pos = cgroup_rstat_updated_list(cgrp, cpu);
for (; pos; pos = pos->rstat_flush_next) {
struct cgroup_subsys_state *css;