================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb read to 0xffff88810270c578 of 2 bytes by interrupt on cpu 0: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:873 [inline] virtqueue_disable_cb+0x58/0x150 drivers/virtio/virtio_ring.c:2566 skb_xmit_done+0x65/0x140 drivers/net/virtio_net.c:755 vring_interrupt+0x155/0x180 drivers/virtio/virtio_ring.c:2715 __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+0x188/0x4f0 kernel/irq/chip.c:789 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+0x60/0x100 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 security_file_permission+0x3e/0x80 security/security.c:2844 rw_verify_area fs/read_write.c:473 [inline] vfs_write+0x135/0x8e0 fs/read_write.c:677 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+0x2cdd/0x2fb0 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 write to 0xffff88810270c578 of 2 bytes by interrupt on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:874 [inline] virtqueue_disable_cb+0x7a/0x150 drivers/virtio/virtio_ring.c:2566 start_xmit+0x102/0x12c0 drivers/net/virtio_net.c:3298 __netdev_start_xmit include/linux/netdevice.h:5215 [inline] netdev_start_xmit include/linux/netdevice.h:5224 [inline] xmit_one net/core/dev.c:3830 [inline] dev_hard_start_xmit+0x122/0x3e0 net/core/dev.c:3846 sch_direct_xmit+0x192/0x550 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0xe4f/0x1fb0 net/core/dev.c:4679 dev_queue_xmit include/linux/netdevice.h:3355 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [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+0x112/0x290 net/ipv4/ip_output.c:323 NF_HOOK_COND include/linux/netfilter.h:306 [inline] ip_output+0xad/0x170 net/ipv4/ip_output.c:433 dst_output include/net/dst.h:459 [inline] ip_local_out net/ipv4/ip_output.c:129 [inline] __ip_queue_xmit+0xb25/0xb40 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:2838 __tcp_push_pending_frames+0x6d/0x1b0 net/ipv4/tcp_output.c:3021 tcp_push_pending_frames include/net/tcp.h:2180 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5780 [inline] tcp_rcv_established+0x9af/0xef0 net/ipv4/tcp_input.c:6231 tcp_v4_do_rcv+0x672/0x740 net/ipv4/tcp_ipv4.c:1925 tcp_v4_rcv+0x1bd7/0x1f60 net/ipv4/tcp_ipv4.c:2363 ip_protocol_deliver_rcu+0x397/0x780 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x184/0x220 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:317 [inline] ip_local_deliver+0xe8/0x1c0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:469 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:578 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:627 [inline] ip_sublist_rcv+0x56b/0x650 net/ipv4/ip_input.c:635 ip_list_rcv+0x261/0x290 net/ipv4/ip_input.c:669 __netif_receive_skb_list_ptype net/core/dev.c:6020 [inline] __netif_receive_skb_list_core+0x4dc/0x500 net/core/dev.c:6067 __netif_receive_skb_list net/core/dev.c:6119 [inline] netif_receive_skb_list_internal+0x487/0x600 net/core/dev.c:6210 gro_normal_list include/net/gro.h:532 [inline] napi_complete_done+0x1a3/0x410 net/core/dev.c:6580 virtqueue_napi_complete drivers/net/virtio_net.c:737 [inline] virtnet_poll+0x189f/0x1d10 drivers/net/virtio_net.c:3053 __napi_poll+0x66/0x3a0 net/core/dev.c:7414 napi_poll net/core/dev.c:7478 [inline] net_rx_action+0x391/0x830 net/core/dev.c:7605 handle_softirqs+0xba/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 __unix_dgram_recvmsg+0x473/0x840 net/unix/af_unix.c:2542 unix_dgram_recvmsg+0x81/0x90 net/unix/af_unix.c:2605 sock_recvmsg_nosec+0x104/0x130 net/socket.c:1017 ____sys_recvmsg+0x26f/0x280 net/socket.c:2784 ___sys_recvmsg+0x11f/0x370 net/socket.c:2828 do_recvmmsg+0x1ef/0x540 net/socket.c:2923 __sys_recvmmsg net/socket.c:2997 [inline] __do_sys_recvmmsg net/socket.c:3020 [inline] __se_sys_recvmmsg net/socket.c:3013 [inline] __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3013 x64_sys_call+0x1c6a/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:300 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: 2384 Comm: syz.6.7620 Tainted: G W 6.16.0-rc2-syzkaller-00278-g3f75bfff44be #0 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================