================================================================== BUG: KCSAN: data-race in virtqueue_disable_cb / vring_interrupt write to 0xffff888103365e5a of 1 bytes by interrupt on cpu 0: vring_interrupt+0x124/0x170 drivers/virtio/virtio_ring.c:2466 __handle_irq_event_percpu+0x92/0x400 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x60/0xf0 kernel/irq/handle.c:210 handle_edge_irq+0x17e/0x5a0 kernel/irq/chip.c:819 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq arch/x86/kernel/irq.c:231 [inline] __common_interrupt+0x60/0x100 arch/x86/kernel/irq.c:250 common_interrupt+0x9a/0xc0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:640 crng_make_state+0x1ad/0x3b0 _get_random_bytes+0x95/0x1b0 drivers/char/random.c:385 get_random_bytes+0x19/0x20 drivers/char/random.c:417 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:779 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x41f/0x5b0 drivers/net/netdevsim/dev.c:853 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 read to 0xffff888103365e5a of 1 bytes by task 3124 on cpu 1: virtqueue_disable_cb+0x17/0x160 drivers/virtio/virtio_ring.c:2315 start_xmit+0xd1/0xb70 drivers/net/virtio_net.c:1837 __netdev_start_xmit include/linux/netdevice.h:4865 [inline] netdev_start_xmit include/linux/netdevice.h:4879 [inline] xmit_one+0xc0/0x2a0 net/core/dev.c:3583 dev_hard_start_xmit+0x72/0x120 net/core/dev.c:3599 sch_direct_xmit+0x1ac/0x580 net/sched/sch_generic.c:342 __dev_xmit_skb+0x806/0xdb0 net/core/dev.c:3810 __dev_queue_xmit+0x676/0x11c0 net/core/dev.c:4215 dev_queue_xmit include/linux/netdevice.h:3035 [inline] neigh_hh_output include/net/neighbour.h:530 [inline] neigh_output include/net/neighbour.h:544 [inline] ip_finish_output2+0x70b/0x850 net/ipv4/ip_output.c:228 ip_finish_output+0xf3/0x250 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip_output+0xf3/0x1a0 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xa2e/0xa50 net/ipv4/ip_output.c:532 ip_queue_xmit+0x34/0x40 net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x1242/0x1730 net/ipv4/tcp_output.c:1399 __tcp_send_ack+0x1dc/0x2e0 net/ipv4/tcp_output.c:3983 tcp_send_ack+0x23/0x30 net/ipv4/tcp_output.c:3989 __tcp_cleanup_rbuf+0x14e/0x260 net/ipv4/tcp.c:1617 tcp_cleanup_rbuf net/ipv4/tcp.c:1628 [inline] tcp_recvmsg_locked+0x10c4/0x1580 net/ipv4/tcp.c:2649 tcp_recvmsg+0x148/0x4c0 net/ipv4/tcp.c:2679 inet_recvmsg+0x9e/0x210 net/ipv4/af_inet.c:861 sock_recvmsg_nosec net/socket.c:995 [inline] sock_recvmsg net/socket.c:1013 [inline] sock_read_iter+0x1b1/0x1f0 net/socket.c:1086 call_read_iter include/linux/fs.h:2180 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x3a5/0x560 fs/read_write.c:470 ksys_read+0xe8/0x1a0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3124 Comm: syz-fuzzer Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 ==================================================================