syzbot

==================================================================
BUG: KCSAN: data-race in virtqueue_disable_cb / virtqueue_disable_cb

write to 0xffff888101fc5d78 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
 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:-1 [inline]
 __common_interrupt+0x60/0xb0 arch/x86/kernel/irq.c:325
 common_interrupt+0x7e/0x90 arch/x86/kernel/irq.c:318
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
 __sanitizer_cov_trace_const_cmp1+0x8/0x90 kernel/kcov.c:301
 delete_node+0x30/0x5e0 lib/radix-tree.c:551
 __radix_tree_delete+0x514/0x560 lib/radix-tree.c:1379
 radix_tree_delete_item+0x176/0x270 lib/radix-tree.c:1430
 idr_remove+0x2f/0x40 lib/idr.c:154
 kernfs_put+0x12d/0x250 fs/kernfs/dir.c:588
 kernfs_remove_by_name_ns+0xa3/0x100 fs/kernfs/dir.c:1718
 kernfs_remove_by_name include/linux/kernfs.h:633 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xa5/0x170 fs/sysfs/group.c:322
 sysfs_remove_groups+0x3a/0x80 fs/sysfs/group.c:346
 destroy_gid_attrs drivers/infiniband/core/sysfs.c:1182 [inline]
 ib_free_port_attrs+0x8e/0x260 drivers/infiniband/core/sysfs.c:1407
 remove_one_compat_dev drivers/infiniband/core/device.c:1038 [inline]
 rdma_dev_exit_net+0x1aa/0x290 drivers/infiniband/core/device.c:1176
 ops_exit_list net/core/net_namespace.c:198 [inline]
 ops_undo_list+0x278/0x410 net/core/net_namespace.c:251
 cleanup_net+0x2de/0x4d0 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0x4ce/0x9d0 kernel/workqueue.c:3319
 worker_thread+0x582/0x770 kernel/workqueue.c:3400
 kthread+0x486/0x510 kernel/kthread.c:463
 ret_from_fork+0xda/0x150 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888101fc5d78 of 2 bytes by task 3290 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
 start_xmit+0x103/0x17a0 drivers/net/virtio_net.c:3362
 __netdev_start_xmit include/linux/netdevice.h:5222 [inline]
 netdev_start_xmit include/linux/netdevice.h:5231 [inline]
 xmit_one net/core/dev.c:3839 [inline]
 dev_hard_start_xmit+0x122/0x3e0 net/core/dev.c:3855
 sch_direct_xmit+0x192/0x550 net/sched/sch_generic.c:344
 __dev_xmit_skb net/core/dev.c:4114 [inline]
 __dev_queue_xmit+0xe9a/0x2000 net/core/dev.c:4691
 dev_queue_xmit include/linux/netdevice.h:3361 [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+0xbd/0x190 net/ipv4/ip_output.c:436
 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:532
 ip_queue_xmit+0x39/0x50 net/ipv4/ip_output.c:546
 __tcp_transmit_skb+0x1641/0x1a60 net/ipv4/tcp_output.c:1479
 __tcp_send_ack+0x227/0x350 net/ipv4/tcp_output.c:4285
 tcp_send_ack+0x29/0x30 net/ipv4/tcp_output.c:4291
 __tcp_cleanup_rbuf+0xd3/0x2c0 net/ipv4/tcp.c:1541
 tcp_cleanup_rbuf net/ipv4/tcp.c:1552 [inline]
 tcp_recvmsg_locked+0x1ade/0x1fd0 net/ipv4/tcp.c:2875
 tcp_recvmsg+0x12e/0x490 net/ipv4/tcp.c:2905
 inet_recvmsg+0xb7/0x290 net/ipv4/af_inet.c:883
 sock_recvmsg_nosec net/socket.c:1065 [inline]
 sock_recvmsg+0xf6/0x170 net/socket.c:1087
 sock_read_iter+0x152/0x1a0 net/socket.c:1157
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x649/0x770 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+0x27bc/0x2ff0 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: 3290 Comm: syz-executor Tainted: G        W           syzkaller #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
==================================================================