================================================================== BUG: KCSAN: data-race in dccp_poll / dccp_rcv_reset write to 0xffff8881324f5722 of 1 bytes by interrupt on cpu 1: dccp_fin net/dccp/input.c:38 [inline] dccp_rcv_reset+0xad/0x190 net/dccp/input.c:152 dccp_rcv_state_process+0x2fb/0x4d0 net/dccp/input.c:662 dccp_v4_do_rcv+0x8f/0xe0 net/dccp/ipv4.c:695 sk_backlog_rcv include/net/sock.h:1100 [inline] __sk_receive_skb+0x22e/0x590 net/core/sock.c:565 dccp_v4_rcv+0xc55/0xe90 net/dccp/ipv4.c:889 ip_protocol_deliver_rcu+0x23f/0x490 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x126/0x160 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x100/0x1b0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:461 [inline] ip_rcv_finish net/ipv4/ip_input.c:444 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0x1b1/0x260 net/ipv4/ip_input.c:564 __netif_receive_skb_one_core net/core/dev.c:5485 [inline] __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5599 process_backlog+0x23f/0x3b0 net/core/dev.c:5927 __napi_poll+0x65/0x390 net/core/dev.c:6511 napi_poll net/core/dev.c:6578 [inline] net_rx_action+0x37e/0x730 net/core/dev.c:6689 __do_softirq+0x158/0x2e3 kernel/softirq.c:571 do_softirq+0xb1/0xf0 kernel/softirq.c:472 __local_bh_enable_ip+0x6f/0x80 kernel/softirq.c:396 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x32/0x40 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:394 [inline] release_sock+0x104/0x110 net/core/sock.c:3419 inet_wait_for_connect net/ipv4/af_inet.c:593 [inline] __inet_stream_connect+0x3e4/0x6d0 net/ipv4/af_inet.c:685 inet_stream_connect+0x44/0x70 net/ipv4/af_inet.c:724 __sys_connect_file+0xd3/0xe0 net/socket.c:1976 io_connect+0x102/0x270 io_uring/net.c:1277 io_issue_sqe+0x3b2/0x900 io_uring/io_uring.c:1577 io_wq_submit_work+0x3de/0x580 io_uring/io_uring.c:1654 io_worker_handle_work+0x547/0xbf0 io_uring/io-wq.c:587 io_wqe_worker+0x202/0x8f0 io_uring/io-wq.c:632 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 read to 0xffff8881324f5722 of 1 bytes by task 14902 on cpu 0: dccp_poll+0xe0/0x3c0 net/dccp/proto.c:326 sock_poll+0x23e/0x260 net/socket.c:1353 vfs_poll include/linux/poll.h:88 [inline] io_poll_check_events+0x183/0x360 io_uring/poll.c:233 io_apoll_task_func+0x1a/0xa0 io_uring/poll.c:295 handle_tw_list+0x12a/0x180 io_uring/io_uring.c:984 tctx_task_work+0x72/0x360 io_uring/io_uring.c:1031 task_work_run+0x8e/0x110 kernel/task_work.c:177 get_signal+0xeca/0x1020 kernel/signal.c:2634 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166 exit_to_user_mode_prepare+0x69/0x90 kernel/entry/common.c:201 irqentry_exit_to_user_mode+0x5/0x10 kernel/entry/common.c:307 irqentry_exit+0xe/0x40 kernel/entry/common.c:408 sysvec_apic_timer_interrupt+0x4a/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 value changed: 0x00 -> 0x03 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 14902 Comm: syz-executor.3 Not tainted 6.0.0-rc7-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 ==================================================================