=============================
WARNING: suspicious RCU usage
6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0 Not tainted
-----------------------------
kernel/events/callchain.c:162 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-executor243/5935:
 #0: ffffffff8e1bc300 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e1bc300 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace include/linux/rcupdate_trace.h:58 [inline]
 #0: ffffffff8e1bc300 (rcu_read_lock_trace){....}-{0:0}, at: bpf_prog_test_run_syscall+0x345/0x770 net/bpf/test_run.c:1560

stack backtrace:
CPU: 0 UID: 0 PID: 5935 Comm: syz-executor243 Not tainted 6.14.0-rc1-syzkaller-00081-gbb066fe812d6 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 lockdep_rcu_suspicious+0x210/0x3c0 kernel/locking/lockdep.c:6847
 get_callchain_entry+0x26d/0x3e0 kernel/events/callchain.c:162
 get_perf_callchain+0xdb/0x760 kernel/events/callchain.c:226
 __bpf_get_stack+0x4f7/0xa20 kernel/bpf/stackmap.c:454
 ____bpf_get_stack kernel/bpf/stackmap.c:499 [inline]
 bpf_get_stack+0x32/0x40 kernel/bpf/stackmap.c:496
 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1948 [inline]
 bpf_get_stack_raw_tp+0x124/0x160 kernel/trace/bpf_trace.c:1938
 bpf_prog_b8a90dd1efcc4ad9+0x46/0x4a
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_prog_run_pin_on_cpu include/linux/filter.h:725 [inline]
 bpf_prog_test_run_syscall+0x3ae/0x770 net/bpf/test_run.c:1561
 bpf_prog_test_run kernel/bpf/syscall.c:4406 [inline]
 __sys_bpf+0xfc6/0x49c0 kernel/bpf/syscall.c:5812
 __do_sys_bpf kernel/bpf/syscall.c:5901 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5899 [inline]
 __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5899
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f28bed836a9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe7b05d9f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000200000000440 RCX: 00007f28bed836a9
RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a
RBP: 00002000000000c0 R08: 0000000000000000 R09: 0000000000000000
R10: 000020000000010c R11: 0000000000000246 R12: 00002000000000f0
R13: 00002000000000c8 R14: 0000000000000001 R15: 00002000000000c4
 </TASK>