============================= WARNING: suspicious RCU usage 6.10.0-rc5-syzkaller #0 Not tainted ----------------------------- kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor/5974: #0: ffffffff8dd31920 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dd31920 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 include/linux/rcupdate_trace.h:57 stack backtrace: CPU: 1 PID: 5974 Comm: syz-executor Not tainted 6.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 lockdep_rcu_suspicious+0x221/0x340 kernel/locking/lockdep.c:6712 get_callchain_entry+0x2b4/0x3c0 kernel/events/callchain.c:161 get_perf_callchain+0xea/0x840 kernel/events/callchain.c:187 __bpf_get_stack+0x3d4/0x5a0 kernel/bpf/stackmap.c:435 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1994 [inline] bpf_get_stack_raw_tp+0x1a3/0x240 kernel/trace/bpf_trace.c:1984 bpf_prog_d43750871481577d+0x45/0x49 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] bpf_prog_run_pin_on_cpu+0x67/0x150 include/linux/filter.h:715 bpf_prog_test_run_syscall+0x316/0x4e0 net/bpf/test_run.c:1523 bpf_prog_test_run+0x33a/0x3b0 kernel/bpf/syscall.c:4292 __sys_bpf+0x48d/0x810 kernel/bpf/syscall.c:5706 __do_sys_bpf kernel/bpf/syscall.c:5795 [inline] __se_sys_bpf kernel/bpf/syscall.c:5793 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5793 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f920667cea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f92073bf0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f92067b3f80 RCX: 00007f920667cea9 RDX: 0000000000000010 RSI: 0000000020000740 RDI: 000000000000000a RBP: 00007f92066ebff4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f92067b3f80 R15: 00007ffe0528cea8