KCSAN: data-race in unix_poll / unix_release

Kernel	Title	Rank 🛈	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in unix_poll / unix_release_sock (6) net	6	5	1225d	1321d	0/29	auto-obsoleted due to no activity on 2023/05/14 22:15
upstream	KCSAN: data-race in unix_poll / unix_release_sock (3) net	6	1	1501d	1501d	0/29	auto-closed as invalid on 2022/08/12 09:16
upstream	KCSAN: data-race in unix_poll / unix_release_sock net	6	1	1949d	1949d	0/29	auto-closed as invalid on 2021/05/21 02:26
upstream	KCSAN: data-race in unix_poll / unix_release_sock (4) net	6	1	1454d	1454d	0/29	auto-closed as invalid on 2022/09/28 03:19
upstream	KCSAN: data-race in unix_poll / unix_release_sock (2) net	6	1	1909d	1909d	0/29	auto-closed as invalid on 2021/06/30 15:16

================================================================== BUG: KCSAN: data-race in unix_poll / unix_release_sock write to 0xffff888103b74660 of 4 bytes by task 13062 on cpu 0: unix_release_sock+0x3d5/0x760 net/unix/af_unix.c:631 unix_release+0x4e/0x70 net/unix/af_unix.c:1010 __sock_release net/socket.c:650 [inline] sock_close+0x6c/0x150 net/socket.c:1365 __fput+0x292/0x510 fs/file_table.c:320 ____fput+0x11/0x20 fs/file_table.c:353 task_work_run+0x8e/0x110 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x130 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888103b74660 of 4 bytes by task 13064 on cpu 1: unix_poll+0x6d/0x250 net/unix/af_unix.c:3139 sock_poll+0x23e/0x260 net/socket.c:1353 vfs_poll include/linux/poll.h:88 [inline] io_poll_check_events+0x183/0x360 io_uring/poll.c:233 io_apoll_task_func+0x1a/0xa0 io_uring/poll.c:295 handle_tw_list+0x12a/0x180 io_uring/io_uring.c:984 tctx_task_work+0xbd/0x360 io_uring/io_uring.c:1037 task_work_run+0x8e/0x110 kernel/task_work.c:177 get_signal+0xeca/0x1020 kernel/signal.c:2634 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000 -> 0x00000068 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 13064 Comm: syz-executor.1 Not tainted 6.0.0-rc7-syzkaller-00180-g70575e77839f-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 ==================================================================