==================================================================
BUG: KCSAN: data-race in can_receive / can_receive

read to 0xffff8880ba39f018 of 8 bytes by interrupt on cpu 0:
 can_receive+0x1ba/0x230 net/can/af_can.c:668
 can_rcv+0xbd/0x120 net/can/af_can.c:686
 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:5150
 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5264
 process_backlog+0x207/0x4b0 net/core/dev.c:6095
 napi_poll net/core/dev.c:6532 [inline]
 net_rx_action+0x3ae/0xa90 net/core/dev.c:6600
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0xbb/0xe0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0x51/0x80 kernel/locking/spinlock.c:191
 unlock_hrtimer_base kernel/time/hrtimer.c:898 [inline]
 hrtimer_start_range_ns+0x463/0x6a0 kernel/time/hrtimer.c:1136
 hrtimer_start include/linux/hrtimer.h:421 [inline]
 j1939_tp_schedule_txtimer+0x87/0xc0 net/can/j1939/transport.c:671
 j1939_sk_send_loop net/can/j1939/socket.c:1043 [inline]
 j1939_sk_sendmsg+0x8b0/0xba0 net/can/j1939/socket.c:1156
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:659
 ____sys_sendmsg+0x49d/0x4d0 net/socket.c:2330
 ___sys_sendmsg+0xb5/0x100 net/socket.c:2384
 __sys_sendmsg+0xa0/0x160 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg net/socket.c:2424 [inline]
 __x64_sys_sendmsg+0x51/0x70 net/socket.c:2424
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff8880ba39f018 of 8 bytes by interrupt on cpu 1:
 can_receive+0x1d2/0x230 net/can/af_can.c:668
 can_rcv+0xbd/0x120 net/can/af_can.c:686
 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:5150
 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5264
 process_backlog+0x207/0x4b0 net/core/dev.c:6095
 napi_poll net/core/dev.c:6532 [inline]
 net_rx_action+0x3ae/0xa90 net/core/dev.c:6600
 __do_softirq+0x115/0x33f kernel/softirq.c:292
 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603
 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================