================================================================== BUG: KCSAN: data-race in can_send / can_stat_update read-write to 0xffff88811b338190 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 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:928 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff88811b338190 of 8 bytes by interrupt on cpu 0: can_stat_update+0x36e/0x6b0 net/can/proc.c:147 call_timer_fn+0x3a/0x300 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x417/0x640 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0x31/0x70 kernel/time/timer.c:2447 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 kcsan_setup_watchpoint+0x404/0x410 kernel/kcsan/core.c:705 crc32_body lib/crc32.c:112 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0x154/0x520 lib/crc32.c:201 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88 crypto_shash_update+0x4a/0x60 crypto/shash.c:52 jbd2_chksum include/linux/jbd2.h:1799 [inline] jbd2_block_tag_csum_set fs/jbd2/commit.c:334 [inline] jbd2_journal_commit_transaction+0x123b/0x33e0 fs/jbd2/commit.c:683 kjournald2+0x243/0x430 fs/jbd2/journal.c:201 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00000000000215e7 -> 0x00000000000215e8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2746 Comm: jbd2/sda1-8 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ==================================================================