================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 kernel/softirq.c:622 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1076 smpboot_thread_fn+0x32a/0x510 kernel/smpboot.c:160 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 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] napi_threaded_poll_loop+0x4bd/0x660 net/core/dev.c:7868 napi_threaded_poll+0x193/0x240 net/core/dev.c:7905 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x0000a953 -> 0x0000a954 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 25569 Comm: napi/wg1-0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 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/0x640 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385 worker_thread+0x58a/0x780 kernel/workqueue.c:3466 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 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:210 defense_work_handler+0x1f/0x80 net/netfilter/ipvs/ip_vs_ctl.c:235 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385 worker_thread+0x58a/0x780 kernel/workqueue.c:3466 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x0005945d -> 0x0005945e Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 12500 Comm: kworker/1:7 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events_long defense_work_handler ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 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/0x640 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385 worker_thread+0x58a/0x780 kernel/workqueue.c:3466 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 read-write to 0xffff8881681d3f80 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+0xc3/0x480 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:6202 [inline] __netif_receive_skb net/core/dev.c:6315 [inline] process_backlog+0x363/0x670 net/core/dev.c:6666 __napi_poll+0x61/0x300 net/core/dev.c:7730 napi_poll net/core/dev.c:7793 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7950 handle_softirqs+0xb9/0x280 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] fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline] kernel_fpu_end+0x6c/0x80 arch/x86/kernel/fpu/core.c:506 blake2s_compress+0x67/0x1740 lib/crypto/x86/blake2s.h:42 blake2s_update+0xa3/0x160 lib/crypto/blake2s.c:119 hmac+0x20c/0x400 drivers/net/wireguard/noise.c:324 kdf+0xa9/0x1e0 drivers/net/wireguard/noise.c:367 mix_precomputed_dh drivers/net/wireguard/noise.c:426 [inline] wg_noise_handshake_create_initiation+0x372/0x610 drivers/net/wireguard/noise.c:560 wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline] wg_packet_handshake_send_worker+0xb2/0x160 drivers/net/wireguard/send.c:51 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0x4f0/0x9c0 kernel/workqueue.c:3385 worker_thread+0x58a/0x780 kernel/workqueue.c:3466 kthread+0x22a/0x280 kernel/kthread.c:436 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 value changed: 0x000f0fa3 -> 0x000f0fa4 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 26690 Comm: kworker/u8:12 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker ==================================================================