================================================================== BUG: KCSAN: data-race in vti_tunnel_xmit / vti_tunnel_xmit read to 0xffff8881d42cf150 of 8 bytes by task 24005 on cpu 0: vti_tunnel_xmit+0x29b/0xb70 net/ipv4/ip_vti.c:307 __netdev_start_xmit include/linux/netdevice.h:4987 [inline] netdev_start_xmit include/linux/netdevice.h:5001 [inline] xmit_one+0x105/0x2f0 net/core/dev.c:3590 dev_hard_start_xmit net/core/dev.c:3606 [inline] __dev_queue_xmit+0x869/0xf70 net/core/dev.c:4226 dev_queue_xmit+0x13/0x20 net/core/dev.c:4259 __bpf_tx_skb net/core/filter.c:2114 [inline] __bpf_redirect_no_mac net/core/filter.c:2139 [inline] __bpf_redirect+0x5a2/0x840 net/core/filter.c:2162 ____bpf_clone_redirect net/core/filter.c:2429 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2401 ___bpf_prog_run+0xc87/0x30c0 kernel/bpf/core.c:1558 __bpf_prog_run512+0x70/0xa0 kernel/bpf/core.c:1786 bpf_dispatcher_nop_func include/linux/bpf.h:727 [inline] __bpf_prog_run include/linux/filter.h:626 [inline] bpf_prog_run include/linux/filter.h:633 [inline] bpf_test_run+0x18b/0x400 net/bpf/test_run.c:120 bpf_prog_test_run_skb+0x73d/0xed0 net/bpf/test_run.c:666 bpf_prog_test_run kernel/bpf/syscall.c:3335 [inline] __sys_bpf+0x3c5f/0xa360 kernel/bpf/syscall.c:4636 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline] __se_sys_bpf kernel/bpf/syscall.c:4720 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4720 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae write to 0xffff8881d42cf150 of 8 bytes by task 23790 on cpu 1: vti_tunnel_xmit+0x2ad/0xb70 net/ipv4/ip_vti.c:307 __netdev_start_xmit include/linux/netdevice.h:4987 [inline] netdev_start_xmit include/linux/netdevice.h:5001 [inline] xmit_one+0x105/0x2f0 net/core/dev.c:3590 dev_hard_start_xmit net/core/dev.c:3606 [inline] __dev_queue_xmit+0x869/0xf70 net/core/dev.c:4226 dev_queue_xmit+0x13/0x20 net/core/dev.c:4259 __bpf_tx_skb net/core/filter.c:2114 [inline] __bpf_redirect_no_mac net/core/filter.c:2139 [inline] __bpf_redirect+0x5a2/0x840 net/core/filter.c:2162 ____bpf_clone_redirect net/core/filter.c:2429 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2401 ___bpf_prog_run+0xc87/0x30c0 kernel/bpf/core.c:1558 __bpf_prog_run512+0x70/0xa0 kernel/bpf/core.c:1786 bpf_dispatcher_nop_func include/linux/bpf.h:727 [inline] __bpf_prog_run include/linux/filter.h:626 [inline] bpf_prog_run include/linux/filter.h:633 [inline] bpf_test_run+0x18b/0x400 net/bpf/test_run.c:120 bpf_prog_test_run_skb+0x73d/0xed0 net/bpf/test_run.c:666 bpf_prog_test_run kernel/bpf/syscall.c:3335 [inline] __sys_bpf+0x3c5f/0xa360 kernel/bpf/syscall.c:4636 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline] __se_sys_bpf kernel/bpf/syscall.c:4720 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4720 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0000000000018b1e -> 0x0000000000018b21 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23790 Comm: syz-executor.2 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================