============================= WARNING: suspicious RCU usage 6.13.0-rc2-syzkaller-00516-g6b3099ebca13 #0 Not tainted ----------------------------- net/ethtool/common.c:873 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.1.2182/14012: #0: ffff88804a8fc658 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1618 [inline] #0: ffff88804a8fc658 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sockopt_lock_sock net/core/sock.c:1133 [inline] #0: ffff88804a8fc658 (sk_lock-AF_INET6){+.+.}-{0:0}, at: sk_setsockopt+0xebc/0x3290 net/core/sock.c:1290 stack backtrace: CPU: 1 UID: 0 PID: 14012 Comm: syz.1.2182 Not tainted 6.13.0-rc2-syzkaller-00516-g6b3099ebca13 #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+0x241/0x360 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x226/0x340 kernel/locking/lockdep.c:6845 __ethtool_get_ts_info+0x97/0x410 net/ethtool/common.c:873 ethtool_get_phc_vclocks+0xa1/0x160 net/ethtool/common.c:922 sock_timestamping_bind_phc net/core/sock.c:880 [inline] sock_set_timestamping+0x3e2/0xab0 net/core/sock.c:934 sk_setsockopt+0x1fe7/0x3290 net/core/sock.c:1423 udp_lib_setsockopt+0x11d/0xc10 net/ipv4/udp.c:2862 udpv6_setsockopt+0x73/0xb0 net/ipv6/udp.c:1797 do_sock_setsockopt+0x3af/0x720 net/socket.c:2324 __sys_setsockopt net/socket.c:2349 [inline] __do_sys_setsockopt net/socket.c:2355 [inline] __se_sys_setsockopt net/socket.c:2352 [inline] __x64_sys_setsockopt+0x1ee/0x280 net/socket.c:2352 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f62e4185d29 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:00007f62e503e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f62e4375fa0 RCX: 00007f62e4185d29 RDX: 0000000000000025 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f62e4201aa8 R08: 0000000000000004 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f62e4375fa0 R15: 00007fff75946a18