================================================================== BUG: KCSAN: data-race in __dev_queue_xmit / __dev_queue_xmit read to 0xffff8880b4f10108 of 1 bytes by task 8950 on cpu 0: __dev_xmit_skb net/core/dev.c:3470 [inline] __dev_queue_xmit+0x9db/0x1b60 net/core/dev.c:3842 dev_queue_xmit+0x21/0x30 net/core/dev.c:3906 __bpf_tx_skb net/core/filter.c:2060 [inline] __bpf_redirect_common net/core/filter.c:2099 [inline] __bpf_redirect+0x4b4/0x710 net/core/filter.c:2106 ____bpf_clone_redirect net/core/filter.c:2139 [inline] bpf_clone_redirect+0x1a5/0x1f0 net/core/filter.c:2111 bpf_prog_3d1649e183dc2cc1+0xbd0/0x1000 bpf_test_run+0x1c3/0x490 net/bpf/test_run.c:44 bpf_prog_test_run_skb+0x4da/0x840 net/bpf/test_run.c:310 bpf_prog_test_run kernel/bpf/syscall.c:2108 [inline] __do_sys_bpf+0x1664/0x2b90 kernel/bpf/syscall.c:2884 __se_sys_bpf kernel/bpf/syscall.c:2825 [inline] __x64_sys_bpf+0x4c/0x60 kernel/bpf/syscall.c:2825 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880b4f10108 of 1 bytes by task 8949 on cpu 1: qdisc_run_begin include/net/sch_generic.h:160 [inline] __dev_xmit_skb net/core/dev.c:3471 [inline] __dev_queue_xmit+0x17e7/0x1b60 net/core/dev.c:3842 dev_queue_xmit+0x21/0x30 net/core/dev.c:3906 __bpf_tx_skb net/core/filter.c:2060 [inline] __bpf_redirect_common net/core/filter.c:2099 [inline] __bpf_redirect+0x4b4/0x710 net/core/filter.c:2106 ____bpf_clone_redirect net/core/filter.c:2139 [inline] bpf_clone_redirect+0x1a5/0x1f0 net/core/filter.c:2111 bpf_prog_3d1649e183dc2cc1+0xbd0/0x1000 bpf_test_run+0x1c3/0x490 net/bpf/test_run.c:44 bpf_prog_test_run_skb+0x4da/0x840 net/bpf/test_run.c:310 bpf_prog_test_run kernel/bpf/syscall.c:2108 [inline] __do_sys_bpf+0x1664/0x2b90 kernel/bpf/syscall.c:2884 __se_sys_bpf kernel/bpf/syscall.c:2825 [inline] __x64_sys_bpf+0x4c/0x60 kernel/bpf/syscall.c:2825 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8949 Comm: syz-executor.4 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================