./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3693914980 <...> Warning: Permanently added '10.128.1.94' (ED25519) to the list of known hosts. execve("./syz-executor3693914980", ["./syz-executor3693914980"], 0x7fff9c09a540 /* 10 vars */) = 0 brk(NULL) = 0x555556559000 brk(0x555556559d00) = 0x555556559d00 arch_prctl(ARCH_SET_FS, 0x555556559380) = 0 set_tid_address(0x555556559650) = 5008 set_robust_list(0x555556559660, 24) = 0 rseq(0x555556559ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3693914980", 4096) = 28 getrandom("\x94\x7b\xd5\xd8\x63\x5a\x31\x31", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556559d00 brk(0x55555657ad00) = 0x55555657ad00 brk(0x55555657b000) = 0x55555657b000 mprotect(0x7f8bdffae000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556559650) = 5009 ./strace-static-x86_64: Process 5009 attached [pid 5009] set_robust_list(0x555556559660, 24) = 0 [pid 5009] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5009] setpgid(0, 0) = 0 [pid 5009] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5009] write(3, "1000", 4) = 4 [pid 5009] close(3) = 0 [pid 5009] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_XDP, insn_cnt=3, insns=0x20000300, license="syzkaller", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0x60 /* BPF_F_??? */, prog_name="", prog_ifindex=0, expected_attach_type=BPF_XDP, prog_btf_fd=-1, func_info_rec_size=8, func_info=NULL, func_info_cnt=0, line_info_rec_size=16, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL, ...}, 144) = 3 [ 146.447458][ T5009] ===================================================== [ 146.454859][ T5009] BUG: KMSAN: uninit-value in bpf_prog_test_run_xdp+0x1758/0x1a30 [ 146.463566][ T5009] bpf_prog_test_run_xdp+0x1758/0x1a30 [ 146.469269][ T5009] bpf_prog_test_run+0x6af/0xac0 [ 146.474574][ T5009] __sys_bpf+0x649/0xd60 [ 146.479007][ T5009] __x64_sys_bpf+0xa0/0xe0 [ 146.483811][ T5009] do_syscall_64+0xcf/0x1e0 [ 146.488498][ T5009] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.494742][ T5009] [ 146.497180][ T5009] Uninit was stored to memory at: [ 146.502603][ T5009] bpf_test_run+0x515/0xaf0 [ 146.507292][ T5009] bpf_prog_test_run_xdp+0xea5/0x1a30 [ 146.512990][ T5009] bpf_prog_test_run+0x6af/0xac0 [ 146.518136][ T5009] __sys_bpf+0x649/0xd60 [ 146.522797][ T5009] __x64_sys_bpf+0xa0/0xe0 [ 146.527378][ T5009] do_syscall_64+0xcf/0x1e0 [ 146.532211][ T5009] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.538331][ T5009] [ 146.540916][ T5009] Uninit was stored to memory at: [ 146.546156][ T5009] ___bpf_prog_run+0x76dd/0xdb80 [ 146.551435][ T5009] __bpf_prog_run512+0xb5/0xe0 [ 146.556381][ T5009] bpf_test_run+0x42d/0xaf0 [ 146.561450][ T5009] bpf_prog_test_run_xdp+0xea5/0x1a30 [ 146.567037][ T5009] bpf_prog_test_run+0x6af/0xac0 [ 146.572336][ T5009] __sys_bpf+0x649/0xd60 [ 146.576760][ T5009] __x64_sys_bpf+0xa0/0xe0 [ 146.581553][ T5009] do_syscall_64+0xcf/0x1e0 [ 146.586238][ T5009] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.592597][ T5009] [ 146.594992][ T5009] Uninit was stored to memory at: [ 146.600410][ T5009] ___bpf_prog_run+0x8567/0xdb80 [ 146.605494][ T5009] __bpf_prog_run512+0xb5/0xe0 [ 146.610571][ T5009] bpf_test_run+0x42d/0xaf0 [ 146.615281][ T5009] bpf_prog_test_run_xdp+0xea5/0x1a30 [ 146.621110][ T5009] bpf_prog_test_run+0x6af/0xac0 [ 146.626241][ T5009] __sys_bpf+0x649/0xd60 [ 146.630764][ T5009] __x64_sys_bpf+0xa0/0xe0 [ 146.635366][ T5009] do_syscall_64+0xcf/0x1e0 [ 146.640252][ T5009] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.646360][ T5009] [ 146.648774][ T5009] Local variable stack created at: [ 146.654083][ T5009] __bpf_prog_run512+0x45/0xe0 [ 146.659032][ T5009] bpf_test_run+0x42d/0xaf0 [ 146.663953][ T5009] [ 146.666369][ T5009] CPU: 0 PID: 5009 Comm: syz-executor369 Not tainted 6.8.0-rc7-syzkaller-00142-g3aaa8ce7a335 #0 [ 146.677183][ T5009] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 146.687576][ T5009] ===================================================== [ 146.694769][ T5009] Disabling lock debugging due to kernel taint [ 146.701141][ T5009] Kernel panic - not syncing: kmsan.panic set ... [ 146.707684][ T5009] CPU: 0 PID: 5009 Comm: syz-executor369 Tainted: G B 6.8.0-rc7-syzkaller-00142-g3aaa8ce7a335 #0 [ 146.719770][ T5009] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 146.729946][ T5009] Call Trace: [ 146.733319][ T5009] [ 146.736331][ T5009] dump_stack_lvl+0x1bf/0x240 [ 146.741116][ T5009] dump_stack+0x1e/0x20 [ 146.745380][ T5009] panic+0x4de/0xc90 [ 146.749398][ T5009] kmsan_report+0x2d0/0x2d0 [ 146.754035][ T5009] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 146.759999][ T5009] ? __msan_warning+0x96/0x120 [ 146.764921][ T5009] ? bpf_prog_test_run_xdp+0x1758/0x1a30 [ 146.770747][ T5009] ? bpf_prog_test_run+0x6af/0xac0 [ 146.775994][ T5009] ? __sys_bpf+0x649/0xd60 [ 146.780600][ T5009] ? __x64_sys_bpf+0xa0/0xe0 [ 146.785374][ T5009] ? do_syscall_64+0xcf/0x1e0 [ 146.790225][ T5009] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.796448][ T5009] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 146.802940][ T5009] ? kmsan_get_metadata+0x146/0x1c0 [ 146.808293][ T5009] ? kmsan_get_metadata+0x146/0x1c0 [ 146.813609][ T5009] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 146.819579][ T5009] ? kmsan_get_metadata+0x146/0x1c0 [ 146.824897][ T5009] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 146.830867][ T5009] ? bpf_test_run+0xa61/0xaf0 [ 146.835660][ T5009] ? bpf_test_run+0x381/0xaf0 [ 146.840540][ T5009] ? kmsan_get_metadata+0x146/0x1c0 [ 146.845893][ T5009] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 146.851827][ T5009] __msan_warning+0x96/0x120 [ 146.856579][ T5009] bpf_prog_test_run_xdp+0x1758/0x1a30 [ 146.862249][ T5009] ? kmsan_get_metadata+0x146/0x1c0 [ 146.867593][ T5009] ? dev_put+0xb0/0xb0 [ 146.871861][ T5009] bpf_prog_test_run+0x6af/0xac0 [ 146.877019][ T5009] __sys_bpf+0x649/0xd60 [ 146.881504][ T5009] __x64_sys_bpf+0xa0/0xe0 [ 146.886115][ T5009] do_syscall_64+0xcf/0x1e0 [ 146.890755][ T5009] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.896794][ T5009] RIP: 0033:0x7f8bdff3bbf9 [ 146.901344][ T5009] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 146.921163][ T5009] RSP: 002b:00007ffea14665e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 146.929736][ T5009] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8bdff3bbf9 [ 146.937814][ T5009] RDX: 0000000000000050 RSI: 0000000020000580 RDI: 000000000000000a [ 146.945925][ T5009] RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006 [ 146.954012][ T5009] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 146.962084][ T5009] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 [ 146.970211][ T5009] [ 146.973588][ T5009] Kernel Offset: disabled [ 146.977968][ T5009] Rebooting in 86400 seconds..