================================================================== BUG: KCSAN: data-race in unix_release_sock / unix_write_space write to 0xffff8881027fac12 of 1 bytes by task 13910 on cpu 0: unix_release_sock+0x195/0x660 net/unix/af_unix.c:531 unix_release+0x3e/0x70 net/unix/af_unix.c:842 __sock_release+0x85/0x160 net/socket.c:592 sock_close+0x24/0x30 net/socket.c:1270 __fput+0x1e1/0x520 fs/file_table.c:280 ____fput+0x1f/0x30 fs/file_table.c:313 task_work_run+0xf6/0x130 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881027fac12 of 1 bytes by task 13909 on cpu 1: unix_writable net/unix/af_unix.c:446 [inline] unix_write_space+0x3d/0x190 net/unix/af_unix.c:455 sock_wfree+0x146/0x1a0 net/core/sock.c:1958 unix_destruct_scm+0xd9/0x100 net/unix/scm.c:149 skb_release_head_state+0xb8/0x180 net/core/skbuff.c:652 skb_release_all+0x1f/0x60 net/core/skbuff.c:663 __kfree_skb net/core/skbuff.c:679 [inline] kfree_skb net/core/skbuff.c:697 [inline] kfree_skb+0x98/0x210 net/core/skbuff.c:691 unix_release_sock+0x304/0x660 net/unix/af_unix.c:562 unix_release+0x3e/0x70 net/unix/af_unix.c:842 __sock_release+0x85/0x160 net/socket.c:592 sock_close+0x24/0x30 net/socket.c:1270 __fput+0x1e1/0x520 fs/file_table.c:280 ____fput+0x1f/0x30 fs/file_table.c:313 task_work_run+0xf6/0x130 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 13909 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================