syzbot

vcan0: j1939_xtp_rx_dat_one: 0x00000000385e127b: last 00
vcan0: j1939_xtp_rx_dat_one: 0x00000000483d9028: last 00
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BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter

write to 0xffff88810235e108 of 8 bytes by interrupt on cpu 0:
 deliver net/can/af_can.c:575 [inline]
 can_rcv_filter+0x26f/0x520 net/can/af_can.c:608
 can_receive+0x1a2/0x220 net/can/af_can.c:665
 can_rcv+0x9e/0x170 net/can/af_can.c:696
 __netif_receive_skb_one_core net/core/dev.c:5365 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5479
 process_backlog+0x23f/0x3e0 net/core/dev.c:6346
 __napi_poll+0x77/0x510 net/core/dev.c:6892
 napi_poll net/core/dev.c:6959 [inline]
 net_rx_action+0x29f/0x680 net/core/dev.c:7036
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:345
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:652
 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88810235e108 of 8 bytes by interrupt on cpu 1:
 deliver net/can/af_can.c:575 [inline]
 can_rcv_filter+0x260/0x520 net/can/af_can.c:608
 can_receive+0x1a2/0x220 net/can/af_can.c:665
 can_rcv+0x9e/0x170 net/can/af_can.c:696
 __netif_receive_skb_one_core net/core/dev.c:5365 [inline]
 __netif_receive_skb+0x8b/0x1b0 net/core/dev.c:5479
 process_backlog+0x23f/0x3e0 net/core/dev.c:6346
 __napi_poll+0x77/0x510 net/core/dev.c:6892
 napi_poll net/core/dev.c:6959 [inline]
 net_rx_action+0x29f/0x680 net/core/dev.c:7036
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:345
 run_ksoftirqd+0x13/0x20 kernel/softirq.c:652
 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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