============================= WARNING: suspicious RCU usage 5.14.0-rc1-syzkaller #0 Not tainted ----------------------------- include/linux/cgroup.h:481 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 no locks held by syz-executor046/8490. stack backtrace: CPU: 1 PID: 8490 Comm: syz-executor046 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 task_css_set include/linux/cgroup.h:481 [inline] task_dfl_cgroup include/linux/cgroup.h:550 [inline] ____bpf_get_current_cgroup_id kernel/bpf/helpers.c:356 [inline] bpf_get_current_cgroup_id+0x1ce/0x210 kernel/bpf/helpers.c:354 bpf_prog_08c4887f705f20b8+0x10/0xee4 bpf_dispatcher_nop_func include/linux/bpf.h:687 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:624 [inline] bpf_prog_test_run_syscall+0x2cf/0x5f0 net/bpf/test_run.c:954 bpf_prog_test_run kernel/bpf/syscall.c:3207 [inline] __sys_bpf+0x1993/0x53b0 kernel/bpf/syscall.c:4487 __do_sys_bpf kernel/bpf/syscall.c:4573 [inline] __se_sys_bpf kernel/bpf/syscall.c:4571 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x441c39 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe8a7f5878 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441c39 RDX: 0000000000000048 RSI: 0000000020000500 RDI: 000000000000000a RBP: 0000000000000000 R08: 00007ffe8a7f58a7 R09: 00007ffe8a7f58a7 R10: 00007ffe8a7f52f0 R11: 0000000000000246 R12: 00007ffe8a7f58ac R13: 00007ffe8a7f58a8 R14: 00007ffe8a7f58f0 R15: 00007ffe8a7f58e0