==================================================================
BUG: KCSAN: data-race in pollwake / pollwake

write to 0xffffc90000783c30 of 4 bytes by interrupt on cpu 0:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up_sync_key+0x50/0x80 kernel/sched/wait.c:173
 sock_def_readable+0x70/0x1b0 net/core/sock.c:3338
 tcp_data_ready+0x1aa/0x280 net/ipv4/tcp_input.c:5128
 tcp_data_queue+0x11c9/0x2d70 net/ipv4/tcp_input.c:5208
 tcp_rcv_established+0x8fc/0xef0 net/ipv4/tcp_input.c:6155
 tcp_v4_do_rcv+0x2d4/0x630 net/ipv4/tcp_ipv4.c:1906
 tcp_v4_rcv+0x1aae/0x1d40 net/ipv4/tcp_ipv4.c:2329
 ip_protocol_deliver_rcu+0x356/0x6d0 net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x13c/0x1a0 net/ipv4/ip_input.c:233
 NF_HOOK include/linux/netfilter.h:314 [inline]
 ip_local_deliver+0xec/0x1c0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:461 [inline]
 ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
 ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
 ip_sublist_rcv+0x4f0/0x5c0 net/ipv4/ip_input.c:639
 ip_list_rcv+0x25e/0x290 net/ipv4/ip_input.c:674
 __netif_receive_skb_list_ptype net/core/dev.c:5570 [inline]
 __netif_receive_skb_list_core+0x356/0x460 net/core/dev.c:5618
 __netif_receive_skb_list net/core/dev.c:5670 [inline]
 netif_receive_skb_list_internal+0x4e6/0x660 net/core/dev.c:5761
 gro_normal_list include/net/gro.h:439 [inline]
 napi_complete_done+0x1cb/0x450 net/core/dev.c:6101
 virtqueue_napi_complete drivers/net/virtio_net.c:440 [inline]
 virtnet_poll+0x7c0/0xae0 drivers/net/virtio_net.c:2158
 __napi_poll+0x60/0x3b0 net/core/dev.c:6531
 napi_poll net/core/dev.c:6600 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6733
 __do_softirq+0xc4/0x279 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644
 common_interrupt+0x7f/0x90 arch/x86/kernel/irq.c:247
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:636
 ext4_bread+0x4/0x110 fs/ext4/inode.c:883
 __ext4_read_dirblock+0x77/0x5a0 fs/ext4/namei.c:144
 htree_dirblock_to_tree+0x102/0x630 fs/ext4/namei.c:1082
 ext4_htree_fill_tree+0x429/0x9b0 fs/ext4/namei.c:1219
 ext4_dx_readdir fs/ext4/dir.c:597 [inline]
 ext4_readdir+0x15b0/0x1ac0 fs/ext4/dir.c:142
 iterate_dir+0x128/0x300 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64+0x88/0x1a0 fs/readdir.c:390
 __x64_sys_getdents64+0x43/0x50 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to 0xffffc90000783c30 of 4 bytes by task 3102 on cpu 1:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up_sync_key+0x50/0x80 kernel/sched/wait.c:173
 pipe_write+0x962/0xd20 fs/pipe.c:605
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x48a/0x790 fs/read_write.c:584
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3102 Comm: syz-fuzzer Not tainted 6.6.0-syzkaller-16201-gb57b17e88bf5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
==================================================================