================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb read to 0xffff888102106e78 of 2 bytes by interrupt on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:873 [inline] virtqueue_disable_cb+0x58/0x150 drivers/virtio/virtio_ring.c:2570 skb_xmit_done+0x65/0x140 drivers/net/virtio_net.c:784 vring_interrupt+0x155/0x180 drivers/virtio/virtio_ring.c:2719 __handle_irq_event_percpu+0x90/0x440 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x64/0xf0 kernel/irq/handle.c:210 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:266 [inline] __common_interrupt+0x63/0x100 arch/x86/kernel/irq.c:292 common_interrupt+0x7e/0x90 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 syscall_enter_from_user_mode_work include/linux/entry-common.h:92 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:125 [inline] do_syscall_64+0x9c/0x200 arch/x86/entry/syscall_64.c:90 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff888102106e78 of 2 bytes by interrupt on cpu 0: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:874 [inline] virtqueue_disable_cb+0x7a/0x150 drivers/virtio/virtio_ring.c:2570 start_xmit+0x103/0x17a0 drivers/net/virtio_net.c:3362 __netdev_start_xmit include/linux/netdevice.h:5219 [inline] netdev_start_xmit include/linux/netdevice.h:5228 [inline] xmit_one net/core/dev.c:3827 [inline] dev_hard_start_xmit+0x122/0x3e0 net/core/dev.c:3843 sch_direct_xmit+0x192/0x550 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0xe9a/0x2000 net/core/dev.c:4679 dev_queue_xmit include/linux/netdevice.h:3358 [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:235 __ip_finish_output net/ipv4/ip_output.c:-1 [inline] ip_finish_output+0x114/0x2a0 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip_output+0xad/0x170 net/ipv4/ip_output.c:433 dst_output include/net/dst.h:461 [inline] ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0xb4b/0xb80 net/ipv4/ip_output.c:527 ip_queue_xmit+0x39/0x50 net/ipv4/ip_output.c:541 __tcp_transmit_skb+0x1641/0x1a60 net/ipv4/tcp_output.c:1479 tcp_transmit_skb net/ipv4/tcp_output.c:1497 [inline] tcp_write_xmit+0x1210/0x2fd0 net/ipv4/tcp_output.c:2833 __tcp_push_pending_frames+0x6d/0x1b0 net/ipv4/tcp_output.c:3016 tcp_push_pending_frames include/net/tcp.h:2173 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5666 [inline] tcp_rcv_established+0xa7f/0xf50 net/ipv4/tcp_input.c:6218 tcp_v4_do_rcv+0x672/0x740 net/ipv4/tcp_ipv4.c:1926 tcp_v4_rcv+0x1bd5/0x1f70 net/ipv4/tcp_ipv4.c:2368 ip_protocol_deliver_rcu+0x397/0x780 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x1fc/0x2f0 net/ipv4/ip_input.c:239 NF_HOOK include/linux/netfilter.h:318 [inline] ip_local_deliver+0xe8/0x1c0 net/ipv4/ip_input.c:260 dst_input include/net/dst.h:471 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:585 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:634 [inline] ip_sublist_rcv+0x58e/0x670 net/ipv4/ip_input.c:642 ip_list_rcv+0x261/0x290 net/ipv4/ip_input.c:676 __netif_receive_skb_list_ptype net/core/dev.c:6022 [inline] __netif_receive_skb_list_core+0x4dc/0x500 net/core/dev.c:6069 __netif_receive_skb_list net/core/dev.c:6121 [inline] netif_receive_skb_list_internal+0x487/0x600 net/core/dev.c:6212 gro_normal_list include/net/gro.h:532 [inline] gro_flush_normal include/net/gro.h:540 [inline] napi_complete_done+0x1a3/0x410 net/core/dev.c:6581 virtqueue_napi_complete drivers/net/virtio_net.c:766 [inline] virtnet_poll+0x1843/0x1cb0 drivers/net/virtio_net.c:3118 __napi_poll+0x63/0x310 net/core/dev.c:7497 napi_poll net/core/dev.c:7560 [inline] net_rx_action+0x391/0x830 net/core/dev.c:7687 handle_softirqs+0xb7/0x290 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x3a/0xc0 kernel/softirq.c:680 common_interrupt+0x83/0x90 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 kcsan_setup_watchpoint+0x415/0x430 kernel/kcsan/core.c:705 legitimize_path fs/namei.c:787 [inline] try_to_unlazy+0x82/0x3a0 fs/namei.c:848 complete_walk+0xc2/0x200 fs/namei.c:958 path_parentat fs/namei.c:2703 [inline] __filename_parentat+0x17e/0x3f0 fs/namei.c:2725 filename_parentat fs/namei.c:2743 [inline] do_unlinkat+0x99/0x480 fs/namei.c:4625 __do_sys_unlink fs/namei.c:4696 [inline] __se_sys_unlink fs/namei.c:4694 [inline] __x64_sys_unlink+0x2e/0x40 fs/namei.c:4694 x64_sys_call+0x2dc0/0x2ff0 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 value changed: 0x0000 -> 0x0001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3302 Comm: syz-executor Not tainted 6.16.0-syzkaller-11895-gcca7a0aae895 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 ==================================================================