================================================================== BUG: KCSAN: data-race in can_send / can_send read-write to 0xffff8881041c0b90 of 8 bytes by interrupt on cpu 1: can_send+0x5a2/0x6d0 net/can/af_can.c:290 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read-write to 0xffff8881041c0b90 of 8 bytes by interrupt on cpu 0: can_send+0x5a2/0x6d0 net/can/af_can.c:290 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x3a/0xc0 kernel/softirq.c:662 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 get_ctx kernel/kcsan/core.c:206 [inline] check_access kernel/kcsan/core.c:750 [inline] __tsan_read8+0xe2/0x180 kernel/kcsan/core.c:1025 hrtimer_start_range_ns+0x2b/0x720 kernel/time/hrtimer.c:1329 hrtimer_start_expires include/linux/hrtimer.h:274 [inline] hrtimer_sleeper_start_expires kernel/time/hrtimer.c:2063 [inline] do_nanosleep+0x86/0x300 kernel/time/hrtimer.c:2138 hrtimer_nanosleep+0xde/0x2a0 kernel/time/hrtimer.c:2188 common_nsleep+0x68/0x90 kernel/time/posix-timers.c:1356 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1402 [inline] __se_sys_clock_nanosleep+0x20a/0x240 kernel/time/posix-timers.c:1379 __x64_sys_clock_nanosleep+0x55/0x70 kernel/time/posix-timers.c:1379 x64_sys_call+0x25b8/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:231 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000000000000ec3 -> 0x0000000000000ec4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3479 Comm: syz.2.13 Not tainted 6.14.0-rc4-syzkaller-00090-gdd83757f6e68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== ================================================================== BUG: KCSAN: data-race in can_send / can_send read-write to 0xffff8881041c0bf0 of 8 bytes by interrupt on cpu 1: can_send+0x5b6/0x6d0 net/can/af_can.c:291 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:950 smpboot_thread_fn+0x31c/0x4c0 kernel/smpboot.c:164 kthread+0x4ae/0x520 kernel/kthread.c:464 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read-write to 0xffff8881041c0bf0 of 8 bytes by interrupt on cpu 0: can_send+0x5b6/0x6d0 net/can/af_can.c:291 bcm_can_tx+0x314/0x420 net/can/bcm.c:314 bcm_tx_timeout_handler+0xea/0x280 __run_hrtimer kernel/time/hrtimer.c:1801 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1865 hrtimer_run_softirq+0xe4/0x2c0 kernel/time/hrtimer.c:1882 handle_softirqs+0xbf/0x280 kernel/softirq.c:561 do_softirq+0x5e/0x90 kernel/softirq.c:462 __local_bh_enable_ip+0x6e/0x70 kernel/softirq.c:389 __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] addrconf_ifdown+0x3b7/0xed0 net/ipv6/addrconf.c:3903 addrconf_notify+0x2ff/0x950 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x6f/0x1d0 kernel/notifier.c:453 call_netdevice_notifiers_info+0xae/0x100 net/core/dev.c:2212 call_netdevice_notifiers_extack net/core/dev.c:2250 [inline] call_netdevice_notifiers net/core/dev.c:2264 [inline] dev_close_many+0x174/0x240 net/core/dev.c:1748 dev_close+0xce/0x140 net/core/dev.c:1770 team_port_del+0x2c1/0x6d0 drivers/net/team/team_core.c:1372 team_uninit+0x6b/0xf0 drivers/net/team/team_core.c:1686 unregister_netdevice_many_notify+0xd7f/0x1280 net/core/dev.c:11912 rtnl_delete_link net/core/rtnetlink.c:3486 [inline] rtnl_dellink+0x38b/0x590 net/core/rtnetlink.c:3528 rtnetlink_rcv_msg+0x651/0x710 net/core/rtnetlink.c:6912 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x1c/0x30 net/core/rtnetlink.c:6939 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:733 ____sys_sendmsg+0x326/0x4b0 net/socket.c:2573 ___sys_sendmsg net/socket.c:2627 [inline] __sys_sendmsg+0x19d/0x230 net/socket.c:2659 __do_sys_sendmsg net/socket.c:2664 [inline] __se_sys_sendmsg net/socket.c:2662 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2662 x64_sys_call+0x2734/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000000038a0 -> 0x00000000000038a1 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3540 Comm: syz.0.35 Not tainted 6.14.0-rc4-syzkaller-00090-gdd83757f6e68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ==================================================================