================================================================== BUG: KCSAN: data-race in do_sys_poll / pollwake read to 0xffffc900036bbc10 of 4 bytes by task 25048 on cpu 0: poll_schedule_timeout fs/select.c:240 [inline] do_poll fs/select.c:958 [inline] do_sys_poll+0x95d/0xc20 fs/select.c:1009 __do_sys_poll fs/select.c:1074 [inline] __se_sys_poll+0xe1/0x200 fs/select.c:1062 __x64_sys_poll+0x43/0x50 fs/select.c:1062 x64_sys_call+0x2a72/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:8 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 write to 0xffffc900036bbc10 of 4 bytes by task 25053 on cpu 1: __pollwake fs/select.c:195 [inline] pollwake+0xbe/0x110 fs/select.c:215 __wake_up_common kernel/sched/wait.c:89 [inline] __wake_up_common_lock kernel/sched/wait.c:106 [inline] __wake_up+0x65/0xb0 kernel/sched/wait.c:127 snd_seq_cell_free+0x1e7/0x210 sound/core/seq/seq_memory.c:259 snd_seq_dispatch_event+0x210/0x240 snd_seq_check_queue+0x181/0x320 sound/core/seq/seq_queue.c:256 snd_seq_enqueue_event+0x26e/0x2a0 sound/core/seq/seq_queue.c:330 snd_seq_client_enqueue_event+0x21a/0x2b0 sound/core/seq/seq_clientmgr.c:946 snd_seq_write+0x3f3/0x500 sound/core/seq/seq_clientmgr.c:1084 vfs_write+0x281/0x920 fs/read_write.c:677 ksys_write+0xe8/0x1b0 fs/read_write.c:731 __do_sys_write fs/read_write.c:742 [inline] __se_sys_write fs/read_write.c:739 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:739 x64_sys_call+0x287e/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:2 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: 0x00000001 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 25053 Comm: syz.3.8769 Not tainted 6.13.0-rc1-syzkaller-00036-g5076001689e4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ==================================================================