================================================================== BUG: KCSAN: data-race in can_receive / can_receive read-write to 0xffff8881367d0a68 of 8 bytes by interrupt on cpu 0: can_receive+0x62/0x1f0 net/can/af_can.c:650 canfd_rcv+0xe7/0x180 net/can/af_can.c:702 __netif_receive_skb_one_core net/core/dev.c:5452 [inline] __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566 process_backlog+0x21f/0x380 net/core/dev.c:5894 __napi_poll+0x60/0x3b0 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6660 __do_softirq+0xc1/0x265 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x6d/0x80 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 __tsan_read2+0x0/0x180 kernel/kcsan/core.c:753 avtab_search+0x163/0x2f0 security/selinux/ss/avtab.c:195 security_compute_sid+0x5bd/0xe60 security/selinux/ss/services.c:1818 security_transition_sid+0x58/0x70 security/selinux/ss/services.c:1902 socket_sockcreate_sid security/selinux/hooks.c:4494 [inline] selinux_socket_create+0x118/0x170 security/selinux/hooks.c:4527 security_socket_create+0x4e/0x80 security/security.c:4083 __sock_create+0xe2/0x4e0 net/socket.c:1491 sock_create net/socket.c:1587 [inline] __sys_socket_create net/socket.c:1624 [inline] __sys_socket+0x9f/0x220 net/socket.c:1652 __do_sys_socket net/socket.c:1665 [inline] __se_sys_socket net/socket.c:1663 [inline] __x64_sys_socket+0x3f/0x50 net/socket.c:1663 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read-write to 0xffff8881367d0a68 of 8 bytes by interrupt on cpu 1: can_receive+0x62/0x1f0 net/can/af_can.c:650 canfd_rcv+0xe7/0x180 net/can/af_can.c:702 __netif_receive_skb_one_core net/core/dev.c:5452 [inline] __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566 process_backlog+0x21f/0x380 net/core/dev.c:5894 __napi_poll+0x60/0x3b0 net/core/dev.c:6460 napi_poll net/core/dev.c:6527 [inline] net_rx_action+0x32b/0x750 net/core/dev.c:6660 __do_softirq+0xc1/0x265 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x3b/0x90 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x6d/0x80 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 fib6_flush_trees+0xb8/0x1f0 net/ipv6/ip6_fib.c:2281 rt_genid_bump_ipv6 include/net/net_namespace.h:510 [inline] addrconf_dad_completed+0x476/0x8e0 net/ipv6/addrconf.c:4268 addrconf_dad_work+0x891/0xbc0 process_one_work+0x434/0x860 kernel/workqueue.c:2597 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748 kthread+0x1d7/0x210 kernel/kthread.c:389 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 value changed: 0x000000000000106e -> 0x000000000000106f Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3199 Comm: kworker/1:7 Not tainted 6.4.0-syzkaller-12274-g5133c9e51de4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: ipv6_addrconf addrconf_dad_work ==================================================================