================================================================== BUG: KCSAN: data-race in __snd_rawmidi_transmit_ack / snd_rawmidi_write write to 0xffff8880b1fbd578 of 8 bytes by task 2518 on cpu 0: __snd_rawmidi_transmit_ack+0xcf/0x1b0 sound/core/rawmidi.c:1234 snd_rawmidi_transmit+0x9a/0xd0 sound/core/rawmidi.c:1293 snd_vmidi_output_work+0xb3/0x200 sound/core/seq/seq_virmidi.c:143 process_one_work+0x413/0x8f0 kernel/workqueue.c:2264 worker_thread+0xa0/0x800 kernel/workqueue.c:2410 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffff8880b1fbd578 of 8 bytes by task 14493 on cpu 1: snd_rawmidi_write+0x5fb/0x780 sound/core/rawmidi.c:1424 __vfs_write+0x67/0xc0 fs/read_write.c:494 __kernel_write+0xb8/0x240 fs/read_write.c:515 write_pipe_buf+0xb6/0xf0 fs/splice.c:809 splice_from_pipe_feed fs/splice.c:512 [inline] __splice_from_pipe+0x29b/0x4b0 fs/splice.c:636 splice_from_pipe+0xbb/0x100 fs/splice.c:671 default_file_splice_write+0x45/0x90 fs/splice.c:821 do_splice_from fs/splice.c:863 [inline] direct_splice_actor+0xa0/0xc0 fs/splice.c:1037 splice_direct_to_actor+0x22b/0x540 fs/splice.c:992 do_splice_direct+0x161/0x1e0 fs/splice.c:1080 do_sendfile+0x384/0x7f0 fs/read_write.c:1520 __do_sys_sendfile64 fs/read_write.c:1581 [inline] __se_sys_sendfile64 fs/read_write.c:1567 [inline] __x64_sys_sendfile64+0x12a/0x140 fs/read_write.c:1567 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14493 Comm: syz-executor.1 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================