================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 1: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 0: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0x0000000000000863 -> 0x0000000000000864 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 1: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] update_defense_level+0x589/0x5c0 net/netfilter/ipvs/ip_vs_ctl.c:209 defense_work_handler+0x1f/0x80 net/netfilter/ipvs/ip_vs_ctl.c:234 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 0: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] __alloc_skb+0x476/0x4b0 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1383 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:818 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:875 [inline] nsim_dev_trap_report_work+0x18a/0x630 drivers/net/netdevsim/dev.c:921 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0x000000000003e3c0 -> 0x000000000003e3c1 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound nsim_dev_trap_report_work ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff8881001537a0 of 4 bytes by interrupt on cpu 1: can_can_gw_rcv+0x807/0x820 net/can/gw.c:566 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff8881001537a0 of 4 bytes by interrupt on cpu 0: can_can_gw_rcv+0x807/0x820 net/can/gw.c:566 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __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] lock_sock_nested+0x112/0x140 net/core/sock.c:3787 lock_sock include/net/sock.h:1700 [inline] tcp_recvmsg+0x113/0x460 net/ipv4/tcp.c:2926 inet_recvmsg+0xb7/0x290 net/ipv4/af_inet.c:891 sock_recvmsg_nosec net/socket.c:1078 [inline] sock_recvmsg+0xf6/0x170 net/socket.c:1100 sock_read_iter+0x152/0x1a0 net/socket.c:1170 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x64c/0x770 fs/read_write.c:572 ksys_read+0xda/0x1a0 fs/read_write.c:715 __do_sys_read fs/read_write.c:724 [inline] __se_sys_read fs/read_write.c:722 [inline] __x64_sys_read+0x40/0x50 fs/read_write.c:722 x64_sys_call+0x2889/0x3000 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0007dc6c -> 0x0007dc6d Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3304 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff888117fa5108 of 8 bytes by interrupt on cpu 1: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0x242/0x4f0 net/can/af_can.c:609 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff888117fa5108 of 8 bytes by interrupt on cpu 0: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0x242/0x4f0 net/can/af_can.c:609 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0x000000000007ffc6 -> 0x000000000007ffc7 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 1: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __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_tt_global_purge net/batman-adv/translation-table.c:2250 [inline] batadv_tt_purge+0x2cd/0x610 net/batman-adv/translation-table.c:3510 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff88810b53c2e8 of 8 bytes by interrupt on cpu 0: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0xd9/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32b/0x530 kernel/smpboot.c:160 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0x00000000000b86f3 -> 0x00000000000b86f4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff8881001537a0 of 4 bytes by interrupt on cpu 1: can_can_gw_rcv+0x807/0x820 net/can/gw.c:566 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __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_tt_global_purge net/batman-adv/translation-table.c:2250 [inline] batadv_tt_purge+0x2cd/0x610 net/batman-adv/translation-table.c:3510 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 read-write to 0xffff8881001537a0 of 4 bytes by interrupt on cpu 0: can_can_gw_rcv+0x807/0x820 net/can/gw.c:566 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x163/0x1c0 net/can/af_can.c:666 can_rcv+0xed/0x190 net/can/af_can.c:690 __netif_receive_skb_one_core net/core/dev.c:6139 [inline] __netif_receive_skb+0x120/0x270 net/core/dev.c:6252 process_backlog+0x228/0x420 net/core/dev.c:6604 __napi_poll+0x5f/0x300 net/core/dev.c:7668 napi_poll net/core/dev.c:7731 [inline] net_rx_action+0x425/0x8c0 net/core/dev.c:7883 handle_softirqs+0xba/0x290 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __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] nsim_dev_trap_report drivers/net/netdevsim/dev.c:890 [inline] nsim_dev_trap_report_work+0x52b/0x630 drivers/net/netdevsim/dev.c:921 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3340 worker_thread+0x582/0x770 kernel/workqueue.c:3421 kthread+0x489/0x510 kernel/kthread.c:463 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 value changed: 0x000bca79 -> 0x000bca7a Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 8171 Comm: kworker/u8:64 Tainted: G W syzkaller #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: events_unbound nsim_dev_trap_report_work ==================================================================