================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb write to 0xffff88810328a588 of 2 bytes by interrupt on cpu 1: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:1090 [inline] virtqueue_disable_cb+0x75/0x2c0 drivers/virtio/virtio_ring.c:3181 skb_xmit_done+0x67/0x1a0 drivers/net/virtio_net.c:774 vring_interrupt+0x2d7/0x310 drivers/virtio/virtio_ring.c:3335 __handle_irq_event_percpu+0x8b/0x480 kernel/irq/handle.c:209 handle_irq_event_percpu kernel/irq/handle.c:246 [inline] handle_irq_event+0x64/0xf0 kernel/irq/handle.c:263 handle_edge_irq+0x155/0x440 kernel/irq/chip.c:859 generic_handle_irq_desc include/linux/irqdesc.h:188 [inline] handle_irq arch/x86/kernel/irq.c:209 [inline] call_irq_handler arch/x86/kernel/irq.c:-1 [inline] __common_interrupt+0x60/0xb0 arch/x86/kernel/irq.c:280 common_interrupt+0x7e/0x90 arch/x86/kernel/irq.c:273 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:665 kcsan_setup_watchpoint+0x42b/0x4a0 kernel/kcsan/core.c:713 path_has_perm security/selinux/hooks.c:1740 [inline] selinux_inode_getattr+0x18f/0x310 security/selinux/hooks.c:3351 security_inode_getattr+0x7b/0xb0 security/security.c:1895 vfs_getattr fs/stat.c:259 [inline] vfs_fstat fs/stat.c:281 [inline] __do_sys_newfstat fs/stat.c:551 [inline] __se_sys_newfstat+0x6c/0x460 fs/stat.c:546 __x64_sys_newfstat+0x31/0x40 fs/stat.c:546 x64_sys_call+0x1b5f/0x2550 arch/x86/include/generated/asm/syscalls_64.h:6 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88810328a588 of 2 bytes by interrupt on cpu 0: virtqueue_disable_cb_split drivers/virtio/virtio_ring.c:1089 [inline] virtqueue_disable_cb+0x4c/0x2c0 drivers/virtio/virtio_ring.c:3181 start_xmit+0x104/0x1be0 drivers/net/virtio_net.c:3352 __netdev_start_xmit include/linux/netdevice.h:5432 [inline] netdev_start_xmit include/linux/netdevice.h:5441 [inline] xmit_one net/core/dev.c:3953 [inline] dev_hard_start_xmit+0x10c/0x380 net/core/dev.c:3969 sch_direct_xmit+0x199/0x580 net/sched/sch_generic.c:372 __dev_xmit_skb net/core/dev.c:4277 [inline] __dev_queue_xmit+0xda5/0x1ec0 net/core/dev.c:4916 dev_queue_xmit include/linux/netdevice.h:3464 [inline] neigh_hh_output include/net/neighbour.h:544 [inline] neigh_output include/net/neighbour.h:558 [inline] ip_finish_output2+0x752/0x8a0 net/ipv4/ip_output.c:236 __ip_finish_output net/ipv4/ip_output.c:-1 [inline] ip_finish_output+0x112/0x290 net/ipv4/ip_output.c:324 NF_HOOK_COND include/linux/netfilter.h:314 [inline] ip_output+0xbd/0x1c0 net/ipv4/ip_output.c:437 dst_output include/net/dst.h:472 [inline] ip_local_out net/ipv4/ip_output.c:131 [inline] __ip_queue_xmit+0xb4c/0xb80 net/ipv4/ip_output.c:533 ip_queue_xmit+0x39/0x50 net/ipv4/ip_output.c:547 __tcp_transmit_skb+0x1c4f/0x20f0 net/ipv4/tcp_output.c:1717 tcp_transmit_skb net/ipv4/tcp_output.c:1734 [inline] tcp_write_xmit+0x17f7/0x3630 net/ipv4/tcp_output.c:3062 __tcp_push_pending_frames+0x6d/0x1b0 net/ipv4/tcp_output.c:3245 tcp_push_pending_frames include/net/tcp.h:2341 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:6114 [inline] tcp_rcv_established+0xca9/0x1360 net/ipv4/tcp_input.c:6698 tcp_v4_do_rcv+0x3b1/0xa20 net/ipv4/tcp_ipv4.c:1854 tcp_v4_rcv+0x190e/0x1c50 net/ipv4/tcp_ipv4.c:2248 ip_protocol_deliver_rcu+0x38c/0x7a0 net/ipv4/ip_input.c:207 ip_local_deliver_finish+0x1f0/0x2e0 net/ipv4/ip_input.c:241 NF_HOOK include/linux/netfilter.h:325 [inline] ip_local_deliver+0xe8/0x1e0 net/ipv4/ip_input.c:262 dst_input include/net/dst.h:482 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:623 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:675 [inline] ip_sublist_rcv+0x587/0x680 net/ipv4/ip_input.c:683 ip_list_rcv+0x261/0x290 net/ipv4/ip_input.c:717 __netif_receive_skb_list_ptype net/core/dev.c:6341 [inline] __netif_receive_skb_list_core+0x4ef/0x520 net/core/dev.c:6387 __netif_receive_skb_list net/core/dev.c:6439 [inline] netif_receive_skb_list_internal+0x471/0x5e0 net/core/dev.c:6530 gro_normal_list include/net/gro.h:523 [inline] gro_flush_normal include/net/gro.h:531 [inline] napi_complete_done+0x19c/0x3f0 net/core/dev.c:6898 virtqueue_napi_complete drivers/net/virtio_net.c:740 [inline] virtnet_poll+0x1b16/0x1fb0 drivers/net/virtio_net.c:3029 __napi_poll+0x61/0x300 net/core/dev.c:7830 napi_poll net/core/dev.c:7893 [inline] net_rx_action+0x456/0x930 net/core/dev.c:8050 handle_softirqs+0xcc/0x2a0 kernel/softirq.c:645 __do_softirq kernel/softirq.c:679 [inline] invoke_softirq kernel/softirq.c:519 [inline] __irq_exit_rcu+0x44/0xe0 kernel/softirq.c:758 common_interrupt+0x83/0x90 arch/x86/kernel/irq.c:273 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:665 memset_orig+0x4a/0xb0 arch/x86/lib/memset_64.S:74 ____sys_recvmsg+0x59/0x280 net/socket.c:2915 ___sys_recvmsg+0x11f/0x3a0 net/socket.c:2975 do_recvmmsg+0x1e5/0x560 net/socket.c:3070 __sys_recvmmsg net/socket.c:3144 [inline] __do_sys_recvmmsg net/socket.c:3167 [inline] __se_sys_recvmmsg net/socket.c:3160 [inline] __x64_sys_recvmmsg+0xe5/0x170 net/socket.c:3160 x64_sys_call+0x77f/0x2550 arch/x86/include/generated/asm/syscalls_64.h:300 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x0000 -> 0x0001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 27226 Comm: syz.0.5654 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 ==================================================================