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BUG: KCSAN: data-race in pollwake / pollwake

write to 0xffffc9000076bc30 of 4 bytes by interrupt on cpu 1:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common+0xb3/0x130 kernel/sched/wait.c:107
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up_sync_key+0x82/0xc0 kernel/sched/wait.c:213
 sock_def_readable+0x70/0x1b0 net/core/sock.c:3324
 tcp_data_ready+0x1aa/0x280 net/ipv4/tcp_input.c:5034
 tcp_data_queue+0x1327/0x2b80 net/ipv4/tcp_input.c:5114
 tcp_rcv_established+0x60c/0xea0 net/ipv4/tcp_input.c:6053
 tcp_v4_do_rcv+0x2d4/0x630 net/ipv4/tcp_ipv4.c:1728
 tcp_v4_rcv+0x1ade/0x1d60 net/ipv4/tcp_ipv4.c:2150
 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:304 [inline]
 ip_local_deliver+0xec/0x1c0 net/ipv4/ip_input.c:254
 dst_input include/net/dst.h:468 [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+0x7f4/0xb40 drivers/net/virtio_net.c:2155
 __napi_poll+0x60/0x3b0 net/core/dev.c:6531
 napi_poll net/core/dev.c:6598 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6731
 __do_softirq+0xc1/0x265 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
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:705
 str2hashbuf_signed+0xb3/0x310 fs/ext4/hash.c:148
 __ext4fs_dirhash fs/ext4/hash.c:240 [inline]
 ext4fs_dirhash+0x48c/0x9e0 fs/ext4/hash.c:322
 htree_dirblock_to_tree+0x379/0x630 fs/ext4/namei.c:1124
 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+0x121/0x330 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:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffffc9000076bc30 of 4 bytes by task 3103 on cpu 0:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common+0xb3/0x130 kernel/sched/wait.c:107
 __wake_up_common_lock kernel/sched/wait.c:138 [inline]
 __wake_up_sync_key+0x82/0xc0 kernel/sched/wait.c:213
 pipe_write+0x9db/0xdb0 fs/pipe.c:595
 call_write_iter include/linux/fs.h:1956 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x4ab/0x7d0 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:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3103 Comm: syz-fuzzer Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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