================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb read to 0xffff88810276b578 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 __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 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1526 [inline] folios_put_refs+0x232/0x2d0 mm/swap.c:984 free_pages_and_swap_cache+0x278/0x400 mm/swap_state.c:266 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:397 [inline] tlb_flush_mmu+0x2dc/0x450 mm/mmu_gather.c:404 zap_pte_range mm/memory.c:1770 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x2452/0x29a0 mm/memory.c:1894 unmap_single_vma+0x138/0x1d0 mm/memory.c:1940 unmap_vmas+0x18a/0x2b0 mm/memory.c:1984 exit_mmap+0x1b0/0x6c0 mm/mmap.c:1284 __mmput+0x28/0x1c0 kernel/fork.c:1381 mmput+0x40/0x50 kernel/fork.c:1404 exit_mm+0xe4/0x190 kernel/exit.c:595 do_exit+0x569/0x16f0 kernel/exit.c:947 do_group_exit+0xff/0x140 kernel/exit.c:1108 get_signal+0xe59/0xf70 kernel/signal.c:3034 arch_do_signal_or_restart+0x96/0x480 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x7a/0x100 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f write to 0xffff88810276b578 of 2 bytes by task 3305 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:5204 [inline] netdev_start_xmit include/linux/netdevice.h:5213 [inline] xmit_one net/core/dev.c:3776 [inline] dev_hard_start_xmit+0x12f/0x3d0 net/core/dev.c:3792 sch_direct_xmit+0x192/0x550 net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:4018 [inline] __dev_queue_xmit+0xe4f/0x1fb0 net/core/dev.c:4595 dev_queue_xmit include/linux/netdevice.h:3350 [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:303 [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_send_ack+0x227/0x350 net/ipv4/tcp_output.c:4280 tcp_send_ack+0x29/0x30 net/ipv4/tcp_output.c:4286 __tcp_cleanup_rbuf+0xd3/0x2c0 net/ipv4/tcp.c:1514 tcp_cleanup_rbuf net/ipv4/tcp.c:1525 [inline] tcp_recvmsg_locked+0x1aec/0x1fd0 net/ipv4/tcp.c:2848 tcp_recvmsg+0x12e/0x490 net/ipv4/tcp.c:2878 inet_recvmsg+0xb7/0x290 net/ipv4/af_inet.c:883 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0xf6/0x170 net/socket.c:1039 sock_read_iter+0x152/0x1a0 net/socket.c:1109 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x5ca/0x6f0 fs/read_write.c:572 ksys_read+0xda/0x1a0 fs/read_write.c:715 __do_sys_read fs/read_write.c:724 [inline] __se_sys_read fs/read_write.c:722 [inline] __x64_sys_read+0x40/0x50 fs/read_write.c:722 x64_sys_call+0x2d77/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:1 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: 3305 Comm: syz-executor Not tainted 6.15.0-syzkaller-03589-gfeacb1774bd5 #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 ==================================================================