================================================================== BUG: KCSAN: data-race in do_sys_poll / pollwake write to 0xffffc9000119fbd0 of 4 bytes by task 2819 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+0x51/0x80 kernel/sched/wait.c:173 sock_def_readable+0x70/0x1b0 net/core/sock.c:3353 unix_dgram_sendmsg+0xc71/0xfe0 net/unix/af_unix.c:2117 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 sock_write_iter+0x164/0x1b0 net/socket.c:1160 do_iter_readv_writev+0x339/0x3e0 vfs_writev+0x2e4/0x890 fs/read_write.c:971 do_writev+0xf8/0x220 fs/read_write.c:1018 __do_sys_writev fs/read_write.c:1091 [inline] __se_sys_writev fs/read_write.c:1088 [inline] __x64_sys_writev+0x45/0x50 fs/read_write.c:1088 x64_sys_call+0x1ee2/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:21 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffc9000119fbd0 of 4 bytes by task 2820 on cpu 0: poll_schedule_timeout fs/select.c:243 [inline] do_poll fs/select.c:965 [inline] do_sys_poll+0x9b4/0xc10 fs/select.c:1016 __do_sys_ppoll fs/select.c:1122 [inline] __se_sys_ppoll+0x1af/0x1f0 fs/select.c:1102 __x64_sys_ppoll+0x67/0x80 fs/select.c:1102 x64_sys_call+0xeaf/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:272 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2820 Comm: dhcpcd Not tainted 6.10.0-rc1-syzkaller-00267-gcc8ed4d0a848 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ==================================================================