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

read-write to 0xffff88814650b770 of 8 bytes by interrupt on cpu 0:
 can_send+0x570/0x5d0 net/can/af_can.c:290
 bcm_can_tx+0x314/0x420 net/can/bcm.c:314
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1773
 __do_softirq+0xc8/0x285 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:633 [inline]
 irq_exit_rcu+0x3c/0x90 kernel/softirq.c:645
 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
 percpu_down_read_trylock include/linux/percpu-rwsem.h:82 [inline]
 __sb_start_write_trylock include/linux/fs.h:1667 [inline]
 sb_start_write_trylock include/linux/fs.h:1803 [inline]
 touch_atime+0xac/0x350 fs/inode.c:1978
 file_accessed include/linux/fs.h:2457 [inline]
 iterate_dir+0x2e1/0x310 fs/readdir.c:113
 __do_sys_getdents64 fs/readdir.c:409 [inline]
 __se_sys_getdents64+0x88/0x1a0 fs/readdir.c:394
 __x64_sys_getdents64+0x43/0x50 fs/readdir.c:394
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read-write to 0xffff88814650b770 of 8 bytes by interrupt on cpu 1:
 can_send+0x570/0x5d0 net/can/af_can.c:290
 bcm_can_tx+0x314/0x420 net/can/bcm.c:314
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1773
 __do_softirq+0xc8/0x285 kernel/softirq.c:554
 run_ksoftirqd+0x17/0x30 kernel/softirq.c:924
 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

value changed: 0x00000000000037d6 -> 0x00000000000037d7

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22 Comm: ksoftirqd/1 Tainted: G        W          6.8.0-syzkaller-11136-g66a27abac311 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
==================================================================
==================================================================
BUG: KCSAN: data-race in can_send / can_send

read-write to 0xffff88814650b710 of 8 bytes by interrupt on cpu 0:
 can_send+0x55c/0x5d0 net/can/af_can.c:289
 bcm_can_tx+0x314/0x420 net/can/bcm.c:314
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1773
 __do_softirq+0xc8/0x285 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:633 [inline]
 irq_exit_rcu+0x3c/0x90 kernel/softirq.c:645
 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
 dup_fd+0x366/0x610 fs/file.c:382
 copy_files+0xc1/0x130 kernel/fork.c:1791
 copy_process+0xe45/0x1f80 kernel/fork.c:2377
 kernel_clone+0x16a/0x570 kernel/fork.c:2796
 __do_sys_clone kernel/fork.c:2939 [inline]
 __se_sys_clone kernel/fork.c:2923 [inline]
 __x64_sys_clone+0xe8/0x120 kernel/fork.c:2923
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read-write to 0xffff88814650b710 of 8 bytes by interrupt on cpu 1:
 can_send+0x55c/0x5d0 net/can/af_can.c:289
 bcm_can_tx+0x314/0x420 net/can/bcm.c:314
 bcm_tx_timeout_handler+0xdb/0x260
 __run_hrtimer kernel/time/hrtimer.c:1692 [inline]
 __hrtimer_run_queues+0x214/0x5e0 kernel/time/hrtimer.c:1756
 hrtimer_run_softirq+0xe4/0x2d0 kernel/time/hrtimer.c:1773
 __do_softirq+0xc8/0x285 kernel/softirq.c:554
 do_softirq+0x5e/0x90 kernel/softirq.c:455
 __local_bh_enable_ip+0x6e/0x70 kernel/softirq.c:382
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_nc_purge_paths+0x21d/0x270 net/batman-adv/network-coding.c:471
 batadv_nc_worker+0x402/0xac0 net/batman-adv/network-coding.c:722
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0x465/0x990 kernel/workqueue.c:3335
 worker_thread+0x526/0x730 kernel/workqueue.c:3416
 kthread+0x1d1/0x210 kernel/kthread.c:388
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

value changed: 0x000000000000c712 -> 0x000000000000c713

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 56 Comm: kworker/u8:4 Tainted: G        W          6.8.0-syzkaller-11136-g66a27abac311 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: bat_events batadv_nc_worker
==================================================================