hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA4VMT CVE: CVE-2024-53054 -------------------------------- To keep the same with mainline. This reverts commit 24b2bfceaf003dfb5c644c927059d2a52e7946f1. Fixes: 24b2bfceaf00 ("cgroup: Fix AA deadlock caused by cgroup_bpf_release") Signed-off-by: Chen Ridong <chenridong@huawei.com> --- kernel/bpf/cgroup.c | 2 +- kernel/cgroup/cgroup-internal.h | 1 - kernel/cgroup/cgroup.c | 2 +- 3 files changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index 15aea1fbdb6f..913a6a7e62ca 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -334,7 +334,7 @@ static void cgroup_bpf_release_fn(struct percpu_ref *ref) struct cgroup *cgrp = container_of(ref, struct cgroup, bpf.refcnt); INIT_WORK(&cgrp->bpf.release_work, cgroup_bpf_release); - queue_work(cgroup_destroy_wq, &cgrp->bpf.release_work); + queue_work(system_wq, &cgrp->bpf.release_work); } /* Get underlying bpf_prog of bpf_prog_list entry, regardless if it's through diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index f0450eec2590..96a9bd2c26f0 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -13,7 +13,6 @@ extern spinlock_t trace_cgroup_path_lock; extern char trace_cgroup_path[TRACE_CGROUP_PATH_LEN]; extern void __init enable_debug_cgroup(void); -extern struct workqueue_struct *cgroup_destroy_wq; /* * cgroup_path() takes a spin lock. It is good practice not to take diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 555bcb07df6c..52fe6ba2fefd 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -126,7 +126,7 @@ DEFINE_PERCPU_RWSEM(cgroup_threadgroup_rwsem); * destruction work items don't end up filling up max_active of system_wq * which may lead to deadlock. */ -struct workqueue_struct *cgroup_destroy_wq; +static struct workqueue_struct *cgroup_destroy_wq; /* generate an array of cgroup subsystem pointers */ #define SUBSYS(_x) [_x ## _cgrp_id] = &_x ## _cgrp_subsys, -- 2.34.1