============================= WARNING: suspicious RCU usage 5.19.0-syzkaller-11980-ge34cfee65ec8 #0 Not tainted ----------------------------- include/net/sock.h:592 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 4 locks held by syz-executor286/3605: #0: ffff888074d3ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:761 [inline] #0: ffff888074d3ac10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649 #1: ffffc900014c50b8 (&table->hash[i].lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:354 [inline] #1: ffffc900014c50b8 (&table->hash[i].lock){+...}-{2:2}, at: udp_lib_unhash net/ipv4/udp.c:2014 [inline] #1: ffffc900014c50b8 (&table->hash[i].lock){+...}-{2:2}, at: udp_lib_unhash+0x1d5/0x730 net/ipv4/udp.c:2004 #2: ffffffff8d7bb7b8 (reuseport_lock){+...}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:354 [inline] #2: ffffffff8d7bb7b8 (reuseport_lock){+...}-{2:2}, at: reuseport_detach_sock+0x22/0x4a0 net/core/sock_reuseport.c:346 #3: ffff88814b693bb8 (clock-AF_INET6){++..}-{2:2}, at: bpf_sk_reuseport_detach+0x26/0x190 kernel/bpf/reuseport_array.c:26 stack backtrace: CPU: 1 PID: 3605 Comm: syz-executor286 Not tainted 5.19.0-syzkaller-11980-ge34cfee65ec8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __rcu_dereference_sk_user_data_with_flags include/net/sock.h:592 [inline] bpf_sk_reuseport_detach+0x156/0x190 kernel/bpf/reuseport_array.c:27 reuseport_detach_sock+0x8c/0x4a0 net/core/sock_reuseport.c:362 udp_lib_unhash net/ipv4/udp.c:2016 [inline] udp_lib_unhash+0x210/0x730 net/ipv4/udp.c:2004 sk_common_release+0xba/0x390 net/core/sock.c:3600 inet_release+0x12e/0x270 net/ipv4/af_inet.c:428 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:482 __sock_release+0xcd/0x280 net/socket.c:650 sock_close+0x18/0x20 net/socket.c:1365 __fput+0x277/0x9d0 fs/file_table.c:320 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xad5/0x29b0 kernel/exit.c:795 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f10fec41699 Code: Unable to access opcode bytes at RIP 0x7f10fec4166f. RSP: 002b:00007ffca16f3b08 EFLAGS: 00000246 ORIG_RAX: 00000000000000