================================================================== BUG: KCSAN: data-race in snd_rawmidi_transmit / snd_rawmidi_write read-write to 0xffff88810fbe2cf8 of 8 bytes by task 2981 on cpu 0: __snd_rawmidi_transmit_ack sound/core/rawmidi.c:1255 [inline] snd_rawmidi_transmit+0x2a7/0x390 sound/core/rawmidi.c:1314 snd_vmidi_output_work+0xf1/0x200 sound/core/seq/seq_virmidi.c:144 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff88810fbe2cf8 of 8 bytes by task 24417 on cpu 1: snd_rawmidi_write+0x2dd/0x6b0 sound/core/rawmidi.c:1447 vfs_write+0x21a/0x7c0 fs/read_write.c:603 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 24417 Comm: syz-executor.1 Not tainted 5.10.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================