================================================================== BUG: KCSAN: data-race in insert_work / wq_worker_running read-write to 0xffff888237c2a7e0 of 4 bytes by task 6 on cpu 0: wq_worker_running+0x96/0xe0 kernel/workqueue.c:880 schedule_timeout+0xc1/0x290 kernel/time/timer.c:1935 synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:569 [inline] synchronize_rcu_expedited_wait+0x22a/0xbc0 kernel/rcu/tree_exp.h:620 rcu_exp_wait_wake kernel/rcu/tree_exp.h:685 [inline] rcu_exp_sel_wait_wake+0x355/0x630 kernel/rcu/tree_exp.h:719 wait_rcu_exp_gp+0x1a/0x20 kernel/rcu/tree_exp.h:510 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 read to 0xffff888237c2a7e0 of 4 bytes by task 14367 on cpu 1: __need_more_worker kernel/workqueue.c:785 [inline] insert_work+0x10e/0x190 kernel/workqueue.c:1365 __queue_work+0x69e/0x8e0 kernel/workqueue.c:1517 queue_work_on+0x7e/0xe0 kernel/workqueue.c:1545 queue_work include/linux/workqueue.h:502 [inline] schedule_work include/linux/workqueue.h:563 [inline] __xfrm_state_destroy net/xfrm/xfrm_state.c:674 [inline] xfrm_state_put include/net/xfrm.h:793 [inline] xfrm_state_find+0x1521/0x1b80 net/xfrm/xfrm_state.c:1205 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2393 [inline] xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:2438 [inline] xfrm_resolve_and_create_bundle+0x522/0x1bf0 net/xfrm/xfrm_policy.c:2731 xfrm_lookup_with_ifid+0x3be/0x1880 net/xfrm/xfrm_policy.c:3065 xfrm_lookup net/xfrm/xfrm_policy.c:3194 [inline] xfrm_lookup_route+0x37/0x100 net/xfrm/xfrm_policy.c:3205 ip6_dst_lookup_flow+0x94/0xc0 net/ipv6/ip6_output.c:1228 rawv6_sendmsg+0x8f3/0xe40 net/ipv6/raw.c:928 inet_sendmsg+0x5f/0x80 net/ipv4/af_inet.c:819 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x38f/0x500 net/socket.c:2488 ___sys_sendmsg net/socket.c:2542 [inline] __sys_sendmmsg+0x5c3/0x6a0 net/socket.c:2628 __do_sys_sendmmsg net/socket.c:2657 [inline] __se_sys_sendmmsg net/socket.c:2654 [inline] __x64_sys_sendmmsg+0x53/0x60 net/socket.c:2654 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14367 Comm: syz-executor.1 Not tainted 5.19.0-rc8-syzkaller-00003-g5de64d44968e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================