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BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb

read to 0xffff8881032dd278 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: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
 __tsan_read4+0x12/0x190 kernel/kcsan/core.c:1024
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:405 [inline]
 batadv_nc_worker+0x386/0xae0 net/batman-adv/network-coding.c:719
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0x4cb/0x9d0 kernel/workqueue.c:3321
 worker_thread+0x582/0x770 kernel/workqueue.c:3402
 kthread+0x489/0x510 kernel/kthread.c:464
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

write to 0xffff8881032dd278 of 2 bytes by task 3303 on cpu 0:
 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_send_ack+0x227/0x350 net/ipv4/tcp_output.c:4279
 tcp_send_ack+0x29/0x30 net/ipv4/tcp_output.c:4285
 __tcp_cleanup_rbuf+0xd3/0x2c0 net/ipv4/tcp.c:1544
 tcp_cleanup_rbuf net/ipv4/tcp.c:1555 [inline]
 tcp_recvmsg_locked+0x1aec/0x1fd0 net/ipv4/tcp.c:2878
 tcp_recvmsg+0x12e/0x490 net/ipv4/tcp.c:2908
 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: 0 UID: 0 PID: 3303 Comm: syz-executor Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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