================================================================== BUG: KCSAN: data-race in can_send / can_send read-write to 0xffff888118975990 of 8 bytes by interrupt on cpu 1: can_send+0x55c/0x5d0 net/can/af_can.c:289 j1939_send_one+0x19c/0x1d0 net/can/j1939/main.c:357 j1939_tp_tx_dat net/can/j1939/transport.c:646 [inline] j1939_session_tx_dat net/can/j1939/transport.c:838 [inline] j1939_xtp_txnext_transmiter net/can/j1939/transport.c:900 [inline] j1939_tp_txtimer+0xca9/0x1a70 net/can/j1939/transport.c:1160 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1751 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1768 handle_softirqs+0xc3/0x280 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0x3e/0x90 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x3d/0x60 kernel/locking/spinlock.c:194 unlock_hrtimer_base kernel/time/hrtimer.c:1016 [inline] hrtimer_start_range_ns+0x518/0x560 kernel/time/hrtimer.c:1303 hrtimer_start include/linux/hrtimer.h:275 [inline] j1939_tp_schedule_txtimer+0x67/0xa0 net/can/j1939/transport.c:702 j1939_sk_send_loop net/can/j1939/socket.c:1164 [inline] j1939_sk_sendmsg+0x954/0xc00 net/can/j1939/socket.c:1277 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 sock_write_iter+0x164/0x1b0 net/socket.c:1160