syzbot

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

read-write to 0xffff8881009506a8 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
 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

read-write to 0xffff8881009506a8 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
 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: 0x0000000000000a4d -> 0x0000000000000a4e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 17649 Comm: kworker/u8:22 Not tainted syzkaller #0 PREEMPT(voluntary) 
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 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]
 ptr_ring_consume_bh include/linux/ptr_ring.h:377 [inline]
 wg_packet_encrypt_worker+0x169/0xe10 drivers/net/wireguard/send.c:293
 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 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]
 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: 0x0000243d -> 0x0000243e

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 17649 Comm: kworker/u8:22 Not tainted syzkaller #0 PREEMPT(voluntary) 
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_rcv_filter / can_rcv_filter

read-write to 0xffff8881009506a8 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

read-write to 0xffff8881009506a8 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
 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]
 sockopt_lock_sock+0x42/0x50 net/core/sock.c:1152
 do_ipv6_setsockopt+0x699/0x2160 net/ipv6/ipv6_sockglue.c:549
 ipv6_setsockopt+0x59/0x130 net/ipv6/ipv6_sockglue.c:973
 tcp_setsockopt+0x98/0xb0 net/ipv4/tcp.c:4164
 sock_common_setsockopt+0x69/0x80 net/core/sock.c:3973
 do_sock_setsockopt net/socket.c:2322 [inline]
 __sys_setsockopt+0x184/0x200 net/socket.c:2347
 __do_sys_setsockopt net/socket.c:2353 [inline]
 __se_sys_setsockopt net/socket.c:2350 [inline]
 __x64_sys_setsockopt+0x64/0x80 net/socket.c:2350
 x64_sys_call+0x21d5/0x3000 arch/x86/include/generated/asm/syscalls_64.h:55
 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: 0x00000000000871b0 -> 0x00000000000871b2

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 20622 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(voluntary) 
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 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

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
 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: 0x0008c36e -> 0x0008c36f

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound nsim_dev_trap_report_work
==================================================================