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

read to 0xffff88809cb71e84 of 4 bytes by interrupt on cpu 0:
 __dev_queue_xmit+0xb68/0x1ba0 net/core/dev.c:4001
 dev_queue_xmit+0x21/0x30 net/core/dev.c:4046
 can_send+0x289/0x590 net/can/af_can.c:277
 j1939_send_one+0x197/0x200 net/can/j1939/main.c:340
 j1939_xtp_do_tx_ctl+0x120/0x140 net/can/j1939/transport.c:638
 j1939_xtp_tx_abort+0xb0/0xf0 net/can/j1939/transport.c:665
 __j1939_session_cancel+0xe6/0x130 net/can/j1939/transport.c:1061
 j1939_tp_rxtimer+0x1f5/0x234 net/can/j1939/transport.c:1189
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x274/0x5f0 kernel/time/hrtimer.c:1579
 hrtimer_run_softirq+0x10e/0x150 kernel/time/hrtimer.c:1596
 __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
 should_watch kernel/kcsan/core.c:206 [inline]
 check_access kernel/kcsan/core.c:458 [inline]
 __tsan_read8+0xb4/0x100 kernel/kcsan/core.c:589
 ext4_get_groups_count fs/ext4/ext4.h:2932 [inline]
 ext4_get_group_desc+0x37/0x180 fs/ext4/balloc.c:270
 recently_deleted fs/ext4/ialloc.c:673 [inline]
 find_inode_bit.isra.0+0x103/0x300 fs/ext4/ialloc.c:717
 __ext4_new_inode+0xd45/0x2f10 fs/ext4/ialloc.c:909
 ext4_create+0x24e/0x300 fs/ext4/namei.c:2598
 lookup_open fs/namei.c:3241 [inline]
 do_last fs/namei.c:3331 [inline]
 path_openat+0x2b10/0x3580 fs/namei.c:3537
 do_filp_open+0x11e/0x1b0 fs/namei.c:3567
 do_sys_open+0x3b3/0x4f0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x55/0x70 fs/open.c:1110
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88809cb71e84 of 4 bytes by interrupt on cpu 1:
 __netif_tx_lock include/linux/netdevice.h:3935 [inline]
 __dev_queue_xmit+0x1686/0x1ba0 net/core/dev.c:4009
 dev_queue_xmit+0x21/0x30 net/core/dev.c:4046
 can_send+0x289/0x590 net/can/af_can.c:277
 j1939_send_one+0x197/0x200 net/can/j1939/main.c:340
 j1939_tp_tx_dat net/can/j1939/transport.c:615 [inline]
 j1939_session_tx_dat net/can/j1939/transport.c:791 [inline]
 j1939_xtp_txnext_transmiter net/can/j1939/transport.c:847 [inline]
 j1939_tp_txtimer+0x499/0x1230 net/can/j1939/transport.c:1095
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x274/0x5f0 kernel/time/hrtimer.c:1579
 hrtimer_run_softirq+0x10e/0x150 kernel/time/hrtimer.c:1596
 __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
==================================================================