================================================================== BUG: KCSAN: data-race in sock_alloc_send_pskb / unix_release_sock write to 0xffff88813e3b8a30 of 4 bytes by task 6156 on cpu 0: unix_release_sock+0x2e9/0x6e0 net/unix/af_unix.c:550 unix_release+0x2f/0x50 net/unix/af_unix.c:859 __sock_release net/socket.c:599 [inline] sock_close+0x6c/0x150 net/socket.c:1258 __fput+0x25b/0x4e0 fs/file_table.c:280 ____fput+0x11/0x20 fs/file_table.c:313 task_work_run+0xae/0x130 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x156/0x190 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88813e3b8a30 of 4 bytes by task 6173 on cpu 1: sock_error include/net/sock.h:2261 [inline] sock_alloc_send_pskb+0xe4/0x4e0 net/core/sock.c:2336 unix_dgram_sendmsg+0x478/0x1610 net/unix/af_unix.c:1671 unix_seqpacket_sendmsg+0xc2/0x100 net/unix/af_unix.c:2055 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg net/socket.c:674 [inline] ____sys_sendmsg+0x360/0x4d0 net/socket.c:2350 __sys_sendmsg_sock+0x25/0x30 net/socket.c:2416 io_sendmsg fs/io_uring.c:4416 [inline] io_issue_sqe+0x23e7/0x6080 fs/io_uring.c:6076 __io_queue_sqe+0xe9/0x3a0 fs/io_uring.c:6322 io_queue_sqe+0x6d/0x160 fs/io_uring.c:6375 io_submit_sqe+0x15c7/0x30c0 fs/io_uring.c:6546 io_submit_sqes+0x61f/0xaf0 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x217/0xb20 fs/io_uring.c:9182 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9182 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 6173 Comm: syz-executor.2 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================