================================================================== BUG: KCSAN: data-race in vti_tunnel_xmit / vti_tunnel_xmit write to 0xffff88809b664130 of 8 bytes by task 23765 on cpu 1: vti_xmit net/ipv4/ip_vti.c:275 [inline] vti_tunnel_xmit+0x852/0xab0 net/ipv4/ip_vti.c:309 __netdev_start_xmit include/linux/netdevice.h:4634 [inline] netdev_start_xmit include/linux/netdevice.h:4648 [inline] xmit_one+0xc0/0x310 net/core/dev.c:3561 dev_hard_start_xmit net/core/dev.c:3577 [inline] __dev_queue_xmit+0xf00/0x15a0 net/core/dev.c:4136 dev_queue_xmit+0x13/0x20 net/core/dev.c:4169 __bpf_tx_skb net/core/filter.c:2112 [inline] __bpf_redirect_no_mac net/core/filter.c:2137 [inline] __bpf_redirect+0x56a/0x7c0 net/core/filter.c:2160 ____bpf_clone_redirect net/core/filter.c:2191 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2163 bpf_prog_9dc28c0ba0f92efe+0x5c/0x3d8 bpf_dispatcher_nop_func include/linux/bpf.h:586 [inline] bpf_test_run+0x26d/0x4a0 net/bpf/test_run.c:49 bpf_prog_test_run_skb+0x6bd/0xe00 net/bpf/test_run.c:496 bpf_prog_test_run kernel/bpf/syscall.c:2996 [inline] __do_sys_bpf+0x39a0/0x9a60 kernel/bpf/syscall.c:4196 __se_sys_bpf kernel/bpf/syscall.c:4136 [inline] __x64_sys_bpf+0x3d/0x50 kernel/bpf/syscall.c:4136 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88809b664130 of 8 bytes by task 23730 on cpu 0: vti_xmit net/ipv4/ip_vti.c:275 [inline] vti_tunnel_xmit+0x83f/0xab0 net/ipv4/ip_vti.c:309 __netdev_start_xmit include/linux/netdevice.h:4634 [inline] netdev_start_xmit include/linux/netdevice.h:4648 [inline] xmit_one+0xc0/0x310 net/core/dev.c:3561 dev_hard_start_xmit net/core/dev.c:3577 [inline] __dev_queue_xmit+0xf00/0x15a0 net/core/dev.c:4136 dev_queue_xmit+0x13/0x20 net/core/dev.c:4169 __bpf_tx_skb net/core/filter.c:2112 [inline] __bpf_redirect_no_mac net/core/filter.c:2137 [inline] __bpf_redirect+0x56a/0x7c0 net/core/filter.c:2160 ____bpf_clone_redirect net/core/filter.c:2191 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2163 bpf_prog_9dc28c0ba0f92efe+0x5c/0xb94 bpf_dispatcher_nop_func include/linux/bpf.h:586 [inline] bpf_test_run+0x26d/0x4a0 net/bpf/test_run.c:49 bpf_prog_test_run_skb+0x6bd/0xe00 net/bpf/test_run.c:496 bpf_prog_test_run kernel/bpf/syscall.c:2996 [inline] __do_sys_bpf+0x39a0/0x9a60 kernel/bpf/syscall.c:4196 __se_sys_bpf kernel/bpf/syscall.c:4136 [inline] __x64_sys_bpf+0x3d/0x50 kernel/bpf/syscall.c:4136 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 23730 Comm: syz-executor.5 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================