================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32a/0x510 kernel/smpboot.c:160 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __raw_read_unlock_bh include/linux/rwlock_api_smp.h:281 [inline] _raw_read_unlock_bh+0x1b/0x30 kernel/locking/spinlock.c:284 wg_socket_send_skb_to_peer+0x111/0x130 drivers/net/wireguard/socket.c:184 wg_packet_create_data_done drivers/net/wireguard/send.c:251 [inline] wg_packet_tx_worker+0x12d/0x330 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x0000000000159918 -> 0x0000000000159919 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3527 Comm: kworker/1:6 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: wg-crypt-wg0 wg_packet_tx_worker ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff8881003ab0b8 of 8 bytes by interrupt on cpu 0: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0x3d6/0x4f0 net/can/af_can.c:636 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 do_softirq+0x45/0x60 kernel/softirq.c:523 __local_bh_enable_ip+0x70/0x80 kernel/softirq.c:450 __raw_read_unlock_bh include/linux/rwlock_api_smp.h:281 [inline] _raw_read_unlock_bh+0x1b/0x30 kernel/locking/spinlock.c:284 ipv6_get_lladdr+0x11c/0x160 net/ipv6/addrconf.c:1942 mld_newpack+0x1e9/0x510 net/ipv6/mcast.c:1789 add_grhead+0x41/0x170 net/ipv6/mcast.c:1886 add_grec+0xa0b/0xab0 net/ipv6/mcast.c:2025 mld_send_cr net/ipv6/mcast.c:2148 [inline] mld_ifc_work+0x508/0x840 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff8881003ab0b8 of 8 bytes by interrupt on cpu 1: deliver net/can/af_can.c:576 [inline] can_rcv_filter+0x3d6/0x4f0 net/can/af_can.c:636 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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+0x2b6/0x690 net/core/skbuff.c:697 alloc_skb include/linux/skbuff.h:1383 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x18a/0x630 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x0000000000004c38 -> 0x0000000000004c39 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 36 Comm: kworker/u8:2 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events_unbound nsim_dev_trap_report_work ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1063 smpboot_thread_fn+0x32a/0x510 kernel/smpboot.c:160 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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] get_next_corpse net/netfilter/nf_conntrack_core.c:2350 [inline] nf_ct_iterate_cleanup+0x201/0x3d0 net/netfilter/nf_conntrack_core.c:2371 nf_ct_iterate_cleanup_net+0x8c/0xb0 net/netfilter/nf_conntrack_core.c:2392 iterate_cleanup_work+0x7b/0x170 net/netfilter/nf_nat_masquerade.c:87 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00000000001a03ae -> 0x00000000001a03af Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 4703 Comm: kworker/1:9 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events iterate_cleanup_work ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff88810016dec0 of 4 bytes by interrupt on cpu 0: can_can_gw_rcv+0x863/0x870 net/can/gw.c:572 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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+0x658/0x690 net/core/skbuff.c:697 alloc_skb include/linux/skbuff.h:1383 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:819 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x18a/0x630 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff88810016dec0 of 4 bytes by interrupt on cpu 1: can_can_gw_rcv+0x863/0x870 net/can/gw.c:572 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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+0x59d/0x5d0 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:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x001a2ff6 -> 0x001a2ff7 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3527 Comm: kworker/1:6 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events_long defense_work_handler ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] batadv_tt_local_purge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x2b/0x610 net/batman-adv/translation-table.c:3509 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] wg_packet_decrypt_worker+0x166/0x6e0 drivers/net/wireguard/receive.c:499 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x00000000001f20fd -> 0x00000000001f20fe Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3409 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: wg-crypt-wg1 wg_packet_decrypt_worker ================================================================== ================================================================== BUG: KCSAN: data-race in can_rcv_filter / can_rcv_filter read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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+0x658/0x690 net/core/skbuff.c:697 alloc_skb include/linux/skbuff.h:1383 [inline] alloc_skb_with_frags+0x7d/0x470 net/core/skbuff.c:6750 sock_alloc_send_pskb+0x44d/0x500 net/core/sock.c:2995 unix_dgram_sendmsg+0x391/0x1060 net/unix/af_unix.c:2125 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x470/0x4d0 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto+0x76/0x90 net/socket.c:2209 x64_sys_call+0x2d35/0x3020 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read-write to 0xffff888101c08298 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+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] batadv_tt_local_purge+0x1a8/0x1f0 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x2b/0x610 net/batman-adv/translation-table.c:3509 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x0000000000242a76 -> 0x0000000000242a78 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 30 Comm: kworker/u8:1 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: bat_events batadv_tt_purge ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff88810016dec0 of 4 bytes by interrupt on cpu 0: can_can_gw_rcv+0x863/0x870 net/can/gw.c:572 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline] wg_packet_encrypt_worker+0xd9c/0xde0 drivers/net/wireguard/send.c:293 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0x4de/0x9e0 kernel/workqueue.c:3358 worker_thread+0x581/0x770 kernel/workqueue.c:3439 kthread+0x22a/0x280 kernel/kthread.c:467 ret_from_fork+0x150/0x360 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff88810016dec0 of 4 bytes by interrupt on cpu 1: can_can_gw_rcv+0x863/0x870 net/can/gw.c:572 deliver net/can/af_can.c:575 [inline] can_rcv_filter+0xc7/0x4f0 net/can/af_can.c:602 can_receive+0x13e/0x190 net/can/af_can.c:674 can_rcv+0x17d/0x1f0 net/can/af_can.c:699 __netif_receive_skb_one_core net/core/dev.c:6156 [inline] __netif_receive_skb net/core/dev.c:6269 [inline] process_backlog+0x363/0x670 net/core/dev.c:6621 __napi_poll+0x61/0x330 net/core/dev.c:7685 napi_poll net/core/dev.c:7748 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7900 handle_softirqs+0xb9/0x2a0 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:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:395 [inline] addrconf_ifdown+0x3bb/0xf90 net/ipv6/addrconf.c:3912 addrconf_notify+0x222/0x8f0 net/ipv6/addrconf.c:-1 notifier_call_chain kernel/notifier.c:85 [inline] raw_notifier_call_chain+0x83/0x1c0 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:2249 [inline] call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] netif_close_many+0x1df/0x2d0 net/core/dev.c:1804 unregister_netdevice_many_notify+0x521/0x1710 net/core/dev.c:12373 unregister_netdevice_many net/core/dev.c:12466 [inline] unregister_netdevice_queue+0x1cd/0x200 net/core/dev.c:12280 unregister_netdevice include/linux/netdevice.h:3408 [inline] __tun_detach+0x82c/0xb30 drivers/net/tun.c:621 tun_detach drivers/net/tun.c:637 [inline] tun_chr_close+0x5a/0x100 drivers/net/tun.c:3436 __fput+0x29b/0x650 fs/file_table.c:469 ____fput+0x1c/0x30 fs/file_table.c:497 task_work_run+0x130/0x1a0 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x466/0x15a0 kernel/exit.c:971 do_group_exit+0xfe/0x140 kernel/exit.c:1112 get_signal+0xe54/0xf60 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x450 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x6a/0x6f0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x249/0x370 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00244e9f -> 0x00244ea0 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3652 Comm: syz.4.41 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 ==================================================================