============================= WARNING: suspicious RCU usage 6.13.0-rc2-syzkaller #0 Not tainted ----------------------------- net/ethtool/common.c:866 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz.2.16/3395: #0: ffff888102b8a258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: sk_setsockopt+0x5a3/0x1350 net/core/sock.c:1285 stack backtrace: CPU: 0 UID: 0 PID: 3395 Comm: syz.2.16 Not tainted 6.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xa3/0x100 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x163/0x1b0 kernel/locking/lockdep.c:6845 __ethtool_get_ts_info+0x54/0x1a0 net/ethtool/common.c:866 ethtool_get_phc_vclocks+0x3c/0x70 net/ethtool/common.c:915 sock_timestamping_bind_phc net/core/sock.c:873 [inline] sock_set_timestamping+0x133/0x2b0 net/core/sock.c:927 sk_setsockopt+0x1051/0x1350 net/core/sock.c:1418 do_sock_setsockopt+0xaa/0x180 net/socket.c:2309 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __x64_sys_setsockopt+0x93/0xd0 net/socket.c:2341 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xa0/0x1b0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efd8b585d19 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:00007efd8c439038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007efd8b775fa0 RCX: 00007efd8b585d19 RDX: 0000000000000025 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007efd8b601a20 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007efd8b775fa0 R15: 00007fff4b77e898