================================================================== BUG: KCSAN: data-race in ipip_tunnel_xmit / ipip_tunnel_xmit read to 0xffff88813177f158 of 8 bytes by task 10063 on cpu 1: ipip_tunnel_xmit+0x1a4/0x2d0 net/ipv4/ipip.c:313 __netdev_start_xmit include/linux/netdevice.h:4683 [inline] netdev_start_xmit include/linux/netdevice.h:4697 [inline] xmit_one+0x105/0x2f0 net/core/dev.c:3473 dev_hard_start_xmit net/core/dev.c:3489 [inline] __dev_queue_xmit+0x86d/0xfa0 net/core/dev.c:4116 dev_queue_xmit+0x13/0x20 net/core/dev.c:4149 __bpf_tx_skb net/core/filter.c:2113 [inline] __bpf_redirect_no_mac net/core/filter.c:2138 [inline] __bpf_redirect+0x5a9/0x850 net/core/filter.c:2161 ____bpf_clone_redirect net/core/filter.c:2428 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2400 ___bpf_prog_run+0xc87/0x30c0 kernel/bpf/core.c:1558 __bpf_prog_run512+0x70/0xa0 kernel/bpf/core.c:1787 bpf_dispatcher_nop_func include/linux/bpf.h:784 [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:3353 [inline] __sys_bpf+0x3caa/0xa3c0 kernel/bpf/syscall.c:4655 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739 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 0xffff88813177f158 of 8 bytes by task 10064 on cpu 0: ipip_tunnel_xmit+0x1b6/0x2d0 net/ipv4/ipip.c:313 __netdev_start_xmit include/linux/netdevice.h:4683 [inline] netdev_start_xmit include/linux/netdevice.h:4697 [inline] xmit_one+0x105/0x2f0 net/core/dev.c:3473 dev_hard_start_xmit net/core/dev.c:3489 [inline] __dev_queue_xmit+0x86d/0xfa0 net/core/dev.c:4116 dev_queue_xmit+0x13/0x20 net/core/dev.c:4149 __bpf_tx_skb net/core/filter.c:2113 [inline] __bpf_redirect_no_mac net/core/filter.c:2138 [inline] __bpf_redirect+0x5a9/0x850 net/core/filter.c:2161 ____bpf_clone_redirect net/core/filter.c:2428 [inline] bpf_clone_redirect+0x168/0x1c0 net/core/filter.c:2400 ___bpf_prog_run+0xc87/0x30c0 kernel/bpf/core.c:1558 __bpf_prog_run512+0x70/0xa0 kernel/bpf/core.c:1787 bpf_dispatcher_nop_func include/linux/bpf.h:784 [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:3353 [inline] __sys_bpf+0x3caa/0xa3c0 kernel/bpf/syscall.c:4655 __do_sys_bpf kernel/bpf/syscall.c:4741 [inline] __se_sys_bpf kernel/bpf/syscall.c:4739 [inline] __x64_sys_bpf+0x3f/0x50 kernel/bpf/syscall.c:4739 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: 0x0000000000001b4d -> 0x0000000000001b53 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10064 Comm: syz-executor.5 Not tainted 5.17.0-rc7-syzkaller-00064-g330f4c53d3c2-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================