================================================================== BUG: KCSAN: data-race in tcp_poll / tcp_reset write to 0xffff888107c0e428 of 4 bytes by interrupt on cpu 0: tcp_reset+0xaf/0x1b0 tcp_rcv_synsent_state_process+0x80f/0x14f0 net/ipv4/tcp_input.c:6158 tcp_rcv_state_process+0x16c/0x1250 net/ipv4/tcp_input.c:6422 tcp_v4_do_rcv+0x42c/0x590 net/ipv4/tcp_ipv4.c:1741 tcp_v4_rcv+0x2087/0x2720 net/ipv4/tcp_ipv4.c:2119 ip_protocol_deliver_rcu+0x2a8/0x570 net/ipv4/ip_input.c:204 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_local_deliver+0x1d6/0x2a0 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:461 [inline] ip_rcv_finish net/ipv4/ip_input.c:429 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0x1b1/0x260 net/ipv4/ip_input.c:540 __netif_receive_skb_one_core net/core/dev.c:5351 [inline] __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5465 process_backlog+0x23f/0x3e0 net/core/dev.c:5797 __napi_poll+0x65/0x3f0 net/core/dev.c:6365 napi_poll net/core/dev.c:6432 [inline] net_rx_action+0x29e/0x650 net/core/dev.c:6519 __do_softirq+0x158/0x2de kernel/softirq.c:558 __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0x37/0x70 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 finish_task_switch+0xda/0x280 kernel/sched/core.c:4875 context_switch kernel/sched/core.c:4998 [inline] __schedule+0x43a/0x690 kernel/sched/core.c:6304 schedule+0x81/0xb0 kernel/sched/core.c:6377 __lock_sock net/core/sock.c:2755 [inline] lock_sock_nested+0xbd/0x130 net/core/sock.c:3301 lock_sock include/net/sock.h:1668 [inline] inet_wait_for_connect net/ipv4/af_inet.c:595 [inline] __inet_stream_connect+0x453/0x6e0 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:1900 io_connect fs/io_uring.c:5353 [inline] io_issue_sqe+0x41a9/0x9610 fs/io_uring.c:6792 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6916 io_worker_handle_work+0x51b/0xc10 fs/io-wq.c:588 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:639 ret_from_fork+0x1f/0x30 read to 0xffff888107c0e428 of 4 bytes by task 19539 on cpu 1: tcp_poll+0x4a6/0x580 net/ipv4/tcp.c:588 sock_poll+0x23e/0x260 net/socket.c:1306 vfs_poll include/linux/poll.h:88 [inline] io_poll_check_events+0x1ff/0x530 fs/io_uring.c:5532 io_apoll_task_func+0x33/0x800 fs/io_uring.c:5591 handle_tw_list fs/io_uring.c:2328 [inline] tctx_task_work+0x8b2/0xc90 fs/io_uring.c:2362 task_work_run+0x8e/0x110 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:213 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x102/0x190 kernel/entry/common.c:207 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300 do_syscall_64+0x50/0xd0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000 -> 0x0000006f Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 19539 Comm: syz-executor.4 Not tainted 5.17.0-rc6-syzkaller-00184-g38f80f42147f-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================