============================= WARNING: suspicious RCU usage 5.15.185-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.3.208/4893: #0: ffffffff8c11c120 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312 stack backtrace: CPU: 0 PID: 4893 Comm: syz.3.208 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 get_callchain_entry+0x2a5/0x3b0 kernel/events/callchain.c:161 get_perf_callchain+0x9f/0x480 kernel/events/callchain.c:187 __bpf_get_stack+0x2cb/0x4f0 kernel/bpf/stackmap.c:482 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline] bpf_get_stack_raw_tp+0x175/0x1d0 kernel/trace/bpf_trace.c:1480 bpf_prog_b8a90dd1efcc4ad9+0x3d/0x4ac bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_prog_run_pin_on_cpu+0x63/0x140 include/linux/filter.h:652 bpf_prog_test_run_syscall+0x354/0x4e0 net/bpf/test_run.c:1061 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3368 __sys_bpf+0x535/0x670 kernel/bpf/syscall.c:4669 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3d51450929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3d4f2b8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f3d51677fa0 RCX: 00007f3d51450929 RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a RBP: 00007f3d514d2b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3d51677fa0 R15: 00007ffe70de3f38 ============================= WARNING: suspicious RCU usage 5.15.185-syzkaller #0 Not tainted ----------------------------- include/linux/perf_event.h:1274 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.3.208/4893: #0: ffffffff8c11c120 (rcu_read_lock_trace){....}-{0:0}, at: rcu_lock_acquire+0x9/0x30 include/linux/rcupdate.h:312 stack backtrace: CPU: 0 PID: 4893 Comm: syz.3.208 Not tainted 5.15.185-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 perf_get_guest_cbs include/linux/perf_event.h:1274 [inline] perf_callchain_user+0x6d3/0x10e0 arch/x86/events/core.c:2870 get_perf_callchain+0x35d/0x480 kernel/events/callchain.c:221 __bpf_get_stack+0x2cb/0x4f0 kernel/bpf/stackmap.c:482 ____bpf_get_stack_raw_tp kernel/trace/bpf_trace.c:1490 [inline] bpf_get_stack_raw_tp+0x175/0x1d0 kernel/trace/bpf_trace.c:1480 bpf_prog_b8a90dd1efcc4ad9+0x3d/0x4ac bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_prog_run_pin_on_cpu+0x63/0x140 include/linux/filter.h:652 bpf_prog_test_run_syscall+0x354/0x4e0 net/bpf/test_run.c:1061 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3368 __sys_bpf+0x535/0x670 kernel/bpf/syscall.c:4669 __do_sys_bpf kernel/bpf/syscall.c:4755 [inline] __se_sys_bpf kernel/bpf/syscall.c:4753 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4753 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3d51450929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3d4f2b8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f3d51677fa0 RCX: 00007f3d51450929 RDX: 0000000000000010 RSI: 0000200000000740 RDI: 000000000000000a RBP: 00007f3d514d2b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3d51677fa0 R15: 00007ffe70de3f38