================================================================== BUG: KCSAN: data-race in tcp_done / tcp_poll write to 0xffff888100c0ebf0 of 1 bytes by interrupt on cpu 1: tcp_done+0x2ca/0x360 net/ipv4/tcp.c:4415 tcp_reset+0x89/0x130 net/ipv4/tcp_input.c:4273 tcp_rcv_synsent_state_process net/ipv4/tcp_input.c:6107 [inline] tcp_rcv_state_process+0xc56/0x2840 net/ipv4/tcp_input.c:6371 tcp_v4_do_rcv+0x3e5/0x4f0 net/ipv4/tcp_ipv4.c:1716 tcp_v4_rcv+0x217c/0x2480 net/ipv4/tcp_ipv4.c:2087 ip_protocol_deliver_rcu+0x20e/0x410 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+0x1d1/0x290 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:458 [inline] ip_rcv_finish net/ipv4/ip_input.c:429 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip_rcv+0xd8/0x170 net/ipv4/ip_input.c:540 __netif_receive_skb_one_core net/core/dev.c:5498 [inline] __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5612 process_backlog+0x23a/0x3f0 net/core/dev.c:6492 __napi_poll+0x65/0x3a0 net/core/dev.c:7047 napi_poll net/core/dev.c:7114 [inline] net_rx_action+0x29f/0x680 net/core/dev.c:7201 __do_softirq+0x12c/0x26e kernel/softirq.c:558 run_ksoftirqd+0x13/0x20 kernel/softirq.c:920 smpboot_thread_fn+0x22f/0x330 kernel/smpboot.c:164 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 read to 0xffff888100c0ebf0 of 1 bytes by task 16005 on cpu 0: tcp_poll+0xf3/0x580 net/ipv4/tcp.c:549 sock_poll+0x23e/0x260 net/socket.c:1288 vfs_poll include/linux/poll.h:90 [inline] __io_arm_poll_handler+0x1af/0x5c0 fs/io_uring.c:5147 io_arm_poll_handler+0x2e8/0x6e0 fs/io_uring.c:5221 __io_queue_sqe+0x135/0x360 fs/io_uring.c:6483 io_queue_sqe fs/io_uring.c:6507 [inline] io_submit_sqe+0x1695/0x3400 fs/io_uring.c:6662 io_submit_sqes+0x822/0xe50 fs/io_uring.c:6778 __do_sys_io_uring_enter fs/io_uring.c:9389 [inline] __se_sys_io_uring_enter+0x1c7/0xa20 fs/io_uring.c:9332 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9332 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00 -> 0x03 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 16005 Comm: syz-executor.5 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================