================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb read to 0xffff888102b37778 of 2 bytes by interrupt on cpu 0: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:877 [inline] virtqueue_disable_cb+0x58/0x150 drivers/virtio/virtio_ring.c:2569 skb_xmit_done+0x65/0x140 drivers/net/virtio_net.c:784 vring_interrupt+0x155/0x180 drivers/virtio/virtio_ring.c:2718 __handle_irq_event_percpu+0x9d/0x540 kernel/irq/handle.c:203 handle_irq_event_percpu kernel/irq/handle.c:240 [inline] handle_irq_event+0x64/0xf0 kernel/irq/handle.c:257 handle_edge_irq+0x154/0x470 kernel/irq/chip.c:855 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:254 [inline] call_irq_handler arch/x86/kernel/irq.c:-1 [inline] __common_interrupt+0x60/0xb0 arch/x86/kernel/irq.c:325 common_interrupt+0x3e/0x90 arch/x86/kernel/irq.c:318 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688 __preempt_count_dec_and_test arch/x86/include/asm/preempt.h:95 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x3c/0x60 kernel/locking/spinlock.c:194 class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:557 [inline] try_to_wake_up+0x3e7/0x630 kernel/sched/core.c:4181 process_timeout+0x1f/0x30 kernel/time/sleep_timeout.c:27 call_timer_fn+0x3b/0x2c0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x415/0x610 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0x31/0x70 kernel/time/timer.c:2403 handle_softirqs+0xba/0x290 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x3a/0xc0 kernel/softirq.c:723 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x74/0x80 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705 terminate_walk+0xce/0x2a0 fs/namei.c:750 path_parentat fs/namei.c:2731 [inline] __filename_parentat+0x34f/0x3f0 fs/namei.c:2747 filename_parentat fs/namei.c:2765 [inline] do_unlinkat+0x99/0x480 fs/namei.c:4712 __do_sys_unlink fs/namei.c:4783 [inline] __se_sys_unlink fs/namei.c:4781 [inline] __x64_sys_unlink+0x2e/0x40 fs/namei.c:4781 x64_sys_call+0x2dcf/0x3000 arch/x86/include/generated/asm/syscalls_64.h:88 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff888102b37778 of 2 bytes by task 3304 on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:878 [inline] virtqueue_disable_cb+0x7a/0x150 drivers/virtio/virtio_ring.c:2569 start_xmit+0x10e/0x17a0 drivers/net/virtio_net.c:3361 __netdev_start_xmit include/linux/netdevice.h:5248 [inline] netdev_start_xmit include/linux/netdevice.h:5257 [inline] xmit_one net/core/dev.c:3845 [inline] dev_hard_start_xmit+0x125/0x3e0 net/core/dev.c:3861 sch_direct_xmit+0x192/0x550 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4152 [inline] __dev_queue_xmit+0xe9a/0x2000 net/core/dev.c:4729 dev_queue_xmit include/linux/netdevice.h:3365 [inline] neigh_hh_output include/net/neighbour.h:531 [inline] neigh_output include/net/neighbour.h:545 [inline] ip_finish_output2+0x77f/0x8b0 net/ipv4/ip_output.c:237 __ip_finish_output net/ipv4/ip_output.c:-1 [inline] ip_finish_output+0x114/0x2a0 net/ipv4/ip_output.c:325 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0xbd/0x190 net/ipv4/ip_output.c:438 dst_output include/net/dst.h:464 [inline] ip_local_out net/ipv4/ip_output.c:131 [inline] __ip_queue_xmit+0xbbf/0xc00 net/ipv4/ip_output.c:534 ip_queue_xmit+0x39/0x50 net/ipv4/ip_output.c:548 __tcp_transmit_skb+0x17fd/0x1c10 net/ipv4/tcp_output.c:1628 tcp_transmit_skb net/ipv4/tcp_output.c:1646 [inline] tcp_write_xmit+0x129c/0x30f0 net/ipv4/tcp_output.c:2999 __tcp_push_pending_frames+0x6d/0x1b0 net/ipv4/tcp_output.c:3182 tcp_push+0x311/0x330 net/ipv4/tcp.c:777 tcp_sendmsg_locked+0x2458/0x2c00 net/ipv4/tcp.c:1376 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1413 inet_sendmsg+0x76/0xd0 net/ipv4/af_inet.c:853 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x102/0x180 net/socket.c:742 sock_write_iter+0x1a7/0x1f0 net/socket.c:1195 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x52a/0x960 fs/read_write.c:686 ksys_write+0xda/0x1a0 fs/read_write.c:738 __do_sys_write fs/read_write.c:749 [inline] __se_sys_write fs/read_write.c:746 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:746 x64_sys_call+0x2802/0x3000 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000 -> 0x0001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 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 10/02/2025 ==================================================================