==================================================================
BUG: KCSAN: data-race in dccp_poll / dccp_rcv_reset

write to 0xffff8881be2a8462 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:1047 [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:5484 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5598
 process_backlog+0x23f/0x3b0 net/core/dev.c:5926
 __napi_poll+0x65/0x390 net/core/dev.c:6492
 napi_poll net/core/dev.c:6559 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6670
 __do_softirq+0x158/0x2e3 kernel/softirq.c:571
 __irq_exit_rcu kernel/softirq.c:650 [inline]
 irq_exit_rcu+0x41/0x70 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x16/0x20
 finish_task_switch+0xcf/0x260 kernel/sched/core.c:5026
 context_switch kernel/sched/core.c:5149 [inline]
 __schedule+0x50d/0x6c0 kernel/sched/core.c:6458
 schedule_idle+0x17/0x30 kernel/sched/core.c:6558
 do_idle+0x22c/0x250 kernel/sched/idle.c:331
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400
 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:266
 secondary_startup_64_no_verify+0xcf/0xdb

read to 0xffff8881be2a8462 of 1 bytes by task 2688 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+0x1ee/0x4f0 fs/io_uring.c:6878
 io_apoll_task_func+0x36/0x2f0 fs/io_uring.c:6951
 handle_tw_list fs/io_uring.c:2938 [inline]
 tctx_task_work+0x8d0/0xc10 fs/io_uring.c:2967
 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 kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00 -> 0x03

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2688 Comm: syz-executor.3 Not tainted 5.19.0-rc8-syzkaller-00102-g33ea1340bafe-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
==================================================================
==================================================================
BUG: KCSAN: data-race in dccp_poll / dccp_rcv_reset

write to 0xffff8881be2a8420 of 4 bytes by interrupt on cpu 1:
 dccp_rcv_reset+0x9a/0x190 net/dccp/input.c:149
 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:1047 [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:5484 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5598
 process_backlog+0x23f/0x3b0 net/core/dev.c:5926
 __napi_poll+0x65/0x390 net/core/dev.c:6492
 napi_poll net/core/dev.c:6559 [inline]
 net_rx_action+0x37e/0x730 net/core/dev.c:6670
 __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:3415
 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:1979
 io_connect fs/io_uring.c:6693 [inline]
 io_issue_sqe+0x607b/0xaac0 fs/io_uring.c:8386
 io_wq_submit_work+0x41b/0x590 fs/io_uring.c:8534
 io_worker_handle_work+0x517/0xc50 fs/io-wq.c:597
 io_wqe_worker+0x1d1/0x940 fs/io-wq.c:644
 ret_from_fork+0x1f/0x30

read to 0xffff8881be2a8420 of 4 bytes by task 2688 on cpu 0:
 dccp_poll+0xbb/0x3c0 net/dccp/proto.c:323
 sock_poll+0x23e/0x260 net/socket.c:1353
 vfs_poll include/linux/poll.h:88 [inline]
 io_poll_check_events+0x1ee/0x4f0 fs/io_uring.c:6878
 io_apoll_task_func+0x36/0x2f0 fs/io_uring.c:6951
 handle_tw_list fs/io_uring.c:2938 [inline]
 tctx_task_work+0x8d0/0xc10 fs/io_uring.c:2967
 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

value changed: 0x00000000 -> 0x0000006f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2688 Comm: syz-executor.3 Not tainted 5.19.0-rc8-syzkaller-00102-g33ea1340bafe-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
==================================================================