KCSAN: data-race in __snd_pcm_lib_xfer / snd_pcm_oss_set

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __snd_pcm_lib_xfer / snd_pcm_oss_set_trigger (3) sound				1	1102d	1102d	0/26	auto-closed as invalid on 2021/05/18 12:52
upstream	KCSAN: data-race in __snd_pcm_lib_xfer / snd_pcm_oss_set_trigger (2) sound				1	1173d	1173d	0/26	auto-closed as invalid on 2021/03/08 20:50

================================================================== BUG: KCSAN: data-race in __snd_pcm_lib_xfer / snd_pcm_oss_set_trigger write to 0xffff88802a6780b8 of 8 bytes by task 17941 on cpu 1: snd_pcm_oss_set_trigger+0x437/0x490 sound/core/oss/pcm_oss.c:2062 snd_pcm_oss_ioctl+0xce8/0x2900 sound/core/oss/pcm_oss.c:2680 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88802a6780b8 of 8 bytes by task 17935 on cpu 0: __snd_pcm_lib_xfer+0xf55/0x1170 sound/core/pcm_lib.c:2246 snd_pcm_oss_write3+0x182/0x210 sound/core/oss/pcm_oss.c:1221 io_playback_transfer+0x7a/0x2a0 sound/core/oss/io.c:47 snd_pcm_plug_write_transfer+0x1d0/0x360 sound/core/oss/pcm_plugin.c:624 snd_pcm_oss_write2+0xe0/0x250 sound/core/oss/pcm_oss.c:1353 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1419 [inline] snd_pcm_oss_write+0x322/0x880 sound/core/oss/pcm_oss.c:2765 vfs_write+0x1b9/0x690 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: 0 PID: 17935 Comm: syz-executor.3 Not tainted 5.10.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================