================================================================== BUG: KCSAN: data-race in virtqueue_enable_cb_delayed / virtqueue_enable_cb_prepare read to 0xffff88821aaa7430 of 2 bytes by interrupt on cpu 0: virtqueue_enable_cb_delayed_split drivers/virtio/virtio_ring.c:794 [inline] virtqueue_enable_cb_delayed+0x1dc/0x4d0 drivers/virtio/virtio_ring.c:2006 start_xmit+0xb0f/0xbe0 drivers/net/virtio_net.c:1565 __netdev_start_xmit include/linux/netdevice.h:4447 [inline] netdev_start_xmit include/linux/netdevice.h:4461 [inline] xmit_one net/core/dev.c:3420 [inline] dev_hard_start_xmit+0xef/0x430 net/core/dev.c:3436 sch_direct_xmit+0x2b3/0x900 net/sched/sch_generic.c:313 __dev_xmit_skb net/core/dev.c:3621 [inline] __dev_queue_xmit+0x13e2/0x1ba0 net/core/dev.c:3982 dev_queue_xmit+0x21/0x30 net/core/dev.c:4046 neigh_hh_output include/net/neighbour.h:500 [inline] neigh_output include/net/neighbour.h:509 [inline] ip_finish_output2+0x89b/0xea0 net/ipv4/ip_output.c:228 __ip_finish_output net/ipv4/ip_output.c:308 [inline] __ip_finish_output+0x23a/0x490 net/ipv4/ip_output.c:290 ip_finish_output+0x41/0x160 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip_output+0xfe/0x230 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:436 [inline] ip_local_out+0x74/0x90 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x3a8/0xa40 net/ipv4/ip_output.c:532 ip_queue_xmit+0x45/0x60 include/net/ip.h:237 __tcp_transmit_skb+0xea3/0x1df0 net/ipv4/tcp_output.c:1170 __tcp_send_ack+0x246/0x300 net/ipv4/tcp_output.c:3697 tcp_send_ack+0x34/0x40 net/ipv4/tcp_output.c:3703 __tcp_ack_snd_check+0xd9/0x580 net/ipv4/tcp_input.c:5243 tcp_rcv_established+0xce9/0xf50 net/ipv4/tcp_input.c:5674 tcp_v4_do_rcv+0x3b5/0x520 net/ipv4/tcp_ipv4.c:1562 tcp_v4_rcv+0x1b2a/0x1d20 net/ipv4/tcp_ipv4.c:1943 ip_protocol_deliver_rcu+0x4d/0x420 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_sublist_rcv_finish+0xf8/0x140 net/ipv4/ip_input.c:549 ip_list_rcv_finish net/ipv4/ip_input.c:599 [inline] ip_sublist_rcv+0x418/0x550 net/ipv4/ip_input.c:607 ip_list_rcv+0x2f5/0x322 net/ipv4/ip_input.c:642 __netif_receive_skb_list_ptype net/core/dev.c:5193 [inline] __netif_receive_skb_list_ptype net/core/dev.c:5182 [inline] __netif_receive_skb_list_core+0x350/0x5c0 net/core/dev.c:5241 __netif_receive_skb_list net/core/dev.c:5293 [inline] netif_receive_skb_list_internal+0x5d8/0x830 net/core/dev.c:5388 gro_normal_list.part.0+0x3a/0xb0 net/core/dev.c:5810 gro_normal_list net/core/dev.c:6216 [inline] napi_complete_done+0x1e4/0x3c0 net/core/dev.c:6203 virtqueue_napi_complete+0x3a/0xa0 drivers/net/virtio_net.c:329 virtnet_poll+0x7a6/0x7d0 drivers/net/virtio_net.c:1432 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x3ae/0xa90 net/core/dev.c:6600 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x21 __read_once_size include/linux/compiler.h:232 [inline] arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline] atomic64_read include/asm-generic/atomic-instrumented.h:851 [inline] atomic_long_read include/asm-generic/atomic-long.h:29 [inline] find_watchpoint kernel/kcsan/core.c:96 [inline] check_access kernel/kcsan/core.c:446 [inline] __tsan_read2+0x34/0x100 kernel/kcsan/core.c:587 tomoyo_check_path_acl+0x2b/0xa0 security/tomoyo/file.c:258 tomoyo_check_acl+0xf6/0x270 security/tomoyo/domain.c:172 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0xe3/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1222 vfs_getattr+0x2e/0x70 fs/stat.c:115 vfs_statx+0x102/0x190 fs/stat.c:191 vfs_lstat include/linux/fs.h:3254 [inline] __do_sys_newlstat+0x51/0xb0 fs/stat.c:354 __se_sys_newlstat fs/stat.c:348 [inline] __x64_sys_newlstat+0x3a/0x50 fs/stat.c:348 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88821aaa7430 of 2 bytes by interrupt on cpu 1: virtqueue_enable_cb_prepare_split drivers/virtio/virtio_ring.c:762 [inline] virtqueue_enable_cb_prepare+0x1ce/0x2b0 drivers/virtio/virtio_ring.c:1946 virtqueue_napi_complete+0x2c/0xa0 drivers/net/virtio_net.c:328 virtnet_poll_tx+0x15f/0x1d0 drivers/net/virtio_net.c:1496 napi_poll net/core/dev.c:6532 [inline] net_rx_action+0x3ae/0xa90 net/core/dev.c:6600 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x21 arch_local_irq_enable arch/x86/include/asm/paravirt.h:762 [inline] preempt_schedule_irq+0x4d/0x90 kernel/sched/core.c:4337 restore_regs_and_return_to_kernel+0x0/0x25 ima_file_check+0x0/0xb0 security/integrity/ima/ima_main.c:232 do_filp_open+0x11e/0x1b0 fs/namei.c:3567 do_sys_open+0x3b3/0x4f0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x55/0x70 fs/open.c:1110 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15959 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================