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BUG: KCSAN: data-race in pollwake / pollwake

write to 0xffffc900006f3c30 of 4 bytes by interrupt 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
 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:5566 [inline]
 __netif_receive_skb_list_core+0x356/0x460 net/core/dev.c:5614
 __netif_receive_skb_list net/core/dev.c:5666 [inline]
 netif_receive_skb_list_internal+0x4e6/0x660 net/core/dev.c:5757
 gro_normal_list include/net/gro.h:439 [inline]
 napi_complete_done+0x1cb/0x450 net/core/dev.c:6097
 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:6527
 napi_poll net/core/dev.c:6594 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6727
 __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
 crc32_body lib/crc32.c:110 [inline]
 crc32_le_generic lib/crc32.c:179 [inline]
 __crc32c_le_base+0x10e/0x520 lib/crc32.c:201
 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88
 crypto_shash_update+0x136/0x1a0 crypto/shash.c:134
 ext4_chksum fs/ext4/ext4.h:2462 [inline]
 ext4_dirblock_csum fs/ext4/namei.c:382 [inline]
 ext4_dirblock_csum_set fs/ext4/namei.c:430 [inline]
 ext4_handle_dirty_dirblock+0x26d/0x340 fs/ext4/namei.c:438
 add_dirent_to_buf+0x349/0x440 fs/ext4/namei.c:2215
 ext4_add_entry+0x3e3/0x1eb0 fs/ext4/namei.c:2448
 ext4_add_nondir+0x50/0x190 fs/ext4/namei.c:2796
 ext4_symlink+0x4dc/0x590 fs/ext4/namei.c:3437
 vfs_symlink+0xc2/0x1a0 fs/namei.c:4480
 do_symlinkat+0xe3/0x320 fs/namei.c:4506
 __do_sys_symlinkat fs/namei.c:4522 [inline]
 __se_sys_symlinkat fs/namei.c:4519 [inline]
 __x64_sys_symlinkat+0x62/0x70 fs/namei.c:4519
 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 0xffffc900006f3c30 of 4 bytes by task 13644 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
 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: 1 PID: 13644 Comm: syz-fuzzer Not tainted 6.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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