================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 handle_softirqs+0xb9/0x280 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x42/0xd0 kernel/softirq.c:735 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] _raw_spin_unlock_irqrestore+0x1a/0x30 kernel/locking/spinlock.c:198 __unix_dgram_recvmsg+0x3a7/0x870 net/unix/af_unix.c:2602 unix_dgram_recvmsg+0x7e/0x90 net/unix/af_unix.c:2676 sock_recvmsg_nosec+0xc2/0xf0 net/socket.c:1137 ____sys_recvmsg+0x26f/0x280 net/socket.c:2916 ___sys_recvmsg+0x11f/0x3b0 net/socket.c:2960 do_recvmmsg+0x1ef/0x560 net/socket.c:3055 __sys_recvmmsg net/socket.c:3129 [inline] __do_sys_recvmmsg net/socket.c:3152 [inline] __se_sys_recvmmsg net/socket.c:3145 [inline] __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3145 x64_sys_call+0x80f/0x3020 arch/x86/include/generated/asm/syscalls_64.h:300 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read-write to 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 handle_softirqs+0xb9/0x280 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x42/0xd0 kernel/softirq.c:735 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 finish_task_switch+0x132/0x320 kernel/sched/core.c:5244 context_switch kernel/sched/core.c:5390 [inline] __schedule+0x936/0xd20 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x5e/0xd0 kernel/sched/core.c:7282 schedule_timeout+0x53/0x180 kernel/time/sleep_timeout.c:75 unix_wait_for_peer+0x135/0x1a0 net/unix/af_unix.c:1622 unix_dgram_sendmsg+0x8de/0x1050 net/unix/af_unix.c:2251 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x563/0x5b0 net/socket.c:2698 ___sys_sendmsg+0x195/0x1e0 net/socket.c:2752 __sys_sendmmsg+0x185/0x320 net/socket.c:2841 __do_sys_sendmmsg net/socket.c:2868 [inline] __se_sys_sendmmsg net/socket.c:2865 [inline] __x64_sys_sendmmsg+0x57/0x70 net/socket.c:2865 x64_sys_call+0x27aa/0x3020 arch/x86/include/generated/asm/syscalls_64.h:308 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000abc3 -> 0x0000abc4 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 21046 Comm: syz.3.4911 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214 spin_unlock_bh include/linux/spinlock.h:396 [inline] __batadv_dat_purge net/batman-adv/distributed-arp-table.c:185 [inline] batadv_dat_purge+0x1e3/0x270 net/batman-adv/distributed-arp-table.c:204 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 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 __raw_write_unlock_bh include/linux/rwlock_api_smp.h:310 [inline] _raw_write_unlock_bh+0x1f/0x30 kernel/locking/spinlock.c:370 sock_orphan include/net/sock.h:2132 [inline] __tcp_close+0x79f/0x1130 net/ipv4/tcp.c:3233 tcp_close+0x28/0xd0 net/ipv4/tcp.c:3316 inet_release+0xcd/0xf0 net/ipv4/af_inet.c:442 __sock_release net/socket.c:722 [inline] sock_close+0x6b/0x150 net/socket.c:1514 __fput+0x29b/0x630 fs/file_table.c:510 fput_close_sync+0xad/0x190 fs/file_table.c:615 __do_sys_close fs/open.c:1507 [inline] __se_sys_close fs/open.c:1492 [inline] __x64_sys_close+0x55/0xf0 fs/open.c:1492 x64_sys_call+0x275d/0x3020 arch/x86/include/generated/asm/syscalls_64.h:4 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0003f232 -> 0x0003f233 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 11151 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:891 [inline] nsim_dev_trap_report_work+0x52b/0x630 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 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 value changed: 0x000835ce -> 0x000835cf Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ================================================================== ================================================================== BUG: KCSAN: data-race in can_can_gw_rcv / can_can_gw_rcv read-write to 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:891 [inline] nsim_dev_trap_report_work+0x52b/0x630 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 0xffff888100173800 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:6209 [inline] __netif_receive_skb net/core/dev.c:6322 [inline] process_backlog+0x363/0x670 net/core/dev.c:6673 __napi_poll+0x61/0x300 net/core/dev.c:7737 napi_poll net/core/dev.c:7800 [inline] net_rx_action+0x452/0x930 net/core/dev.c:7957 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 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:196 [inline] _raw_spin_unlock_bh+0x18/0x20 kernel/locking/spinlock.c:214 spin_unlock_bh include/linux/spinlock.h:396 [inline] release_sock+0x10c/0x180 net/core/sock.c:3825 tcp_recvmsg+0x134/0x460 net/ipv4/tcp.c:2949 inet_recvmsg+0x8d/0x210 net/ipv4/af_inet.c:896 sock_recvmsg_nosec net/socket.c:1137 [inline] sock_recvmsg+0xda/0x120 net/socket.c:1159 sock_read_iter+0x169/0x1b0 net/socket.c:1229 new_sync_read fs/read_write.c:493 [inline] vfs_read+0x6c0/0x7f0 fs/read_write.c:574 ksys_read+0xdc/0x1a0 fs/read_write.c:717 __do_sys_read fs/read_write.c:726 [inline] __se_sys_read fs/read_write.c:724 [inline] __x64_sys_read+0x40/0x50 fs/read_write.c:724 x64_sys_call+0x2886/0x3020 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000c96d5 -> 0x000c96d6 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3304 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 ==================================================================