./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2355200051 <...> Warning: Permanently added '10.128.1.79' (ED25519) to the list of known hosts. execve("./syz-executor2355200051", ["./syz-executor2355200051"], 0x7fffb4f776c0 /* 10 vars */) = 0 brk(NULL) = 0x5555708a7000 brk(0x5555708a7d00) = 0x5555708a7d00 arch_prctl(ARCH_SET_FS, 0x5555708a7380) = 0 set_tid_address(0x5555708a7650) = 5041 set_robust_list(0x5555708a7660, 24) = 0 rseq(0x5555708a7ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2355200051", 4096) = 28 getrandom("\x37\xaa\xf4\x2c\x8c\xb6\xe0\x81", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555708a7d00 brk(0x5555708c8d00) = 0x5555708c8d00 brk(0x5555708c9000) = 0x5555708c9000 mprotect(0x7f3f33fe7000, 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=0x5555708a7650) = 5042 ./strace-static-x86_64: Process 5042 attached [pid 5042] set_robust_list(0x5555708a7660, 24) = 0 [pid 5042] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5042] setpgid(0, 0) = 0 [pid 5042] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5042] write(3, "1000", 4) = 4 [pid 5042] close(3) = 0 executing program [pid 5042] write(1, "executing program\n", 18) = 18 [pid 5042] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_ARRAY, key_size=4, value_size=8, max_entries=1, map_flags=BPF_F_RDONLY_PROG, inner_map_fd=0, map_name="", map_ifindex=0, btf_fd=0, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 [pid 5042] bpf(BPF_MAP_UPDATE_ELEM, {map_fd=3, key=0x20000400, value=0x20000440, flags=BPF_ANY}, 32) = 0 [pid 5042] bpf(BPF_MAP_UPDATE_ELEM, {map_fd=3, key=0x20000000, value=0x20000040, flags=BPF_ANY}, 32) = 0 [pid 5042] bpf(BPF_MAP_FREEZE, {map_fd=3}, 4) = 0 [pid 5042] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SCHED_CLS, insn_cnt=16, insns=0x20000580, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 144) = 4 [ 189.407442][ T5042] ===================================================== [ 189.414845][ T5042] BUG: KMSAN: uninit-value in bstr_printf+0x19df/0x1b50 [ 189.422153][ T5042] bstr_printf+0x19df/0x1b50 [ 189.426986][ T5042] bpf_snprintf+0x1c8/0x360 [ 189.431913][ T5042] ___bpf_prog_run+0x13fe/0xe0f0 [ 189.437123][ T5042] __bpf_prog_run288+0xb5/0xe0 [ 189.442348][ T5042] bpf_test_run+0x499/0xc30 [ 189.447147][ T5042] bpf_prog_test_run_skb+0x14ea/0x1f20 [ 189.453138][ T5042] bpf_prog_test_run+0x6b7/0xad0 [ 189.458327][ T5042] __sys_bpf+0x6aa/0xd90 [ 189.462996][ T5042] __x64_sys_bpf+0xa0/0xe0 [ 189.467651][ T5042] x64_sys_call+0x96b/0x3b50 [ 189.472681][ T5042] do_syscall_64+0xcf/0x1e0 [ 189.477453][ T5042] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.484018][ T5042] [ 189.486470][ T5042] Uninit was stored to memory at: [ 189.491992][ T5042] bpf_bprintf_prepare+0x1393/0x23c0 [ 189.497566][ T5042] bpf_snprintf+0x141/0x360 [ 189.502672][ T5042] ___bpf_prog_run+0x13fe/0xe0f0 [ 189.507887][ T5042] __bpf_prog_run288+0xb5/0xe0 [ 189.513108][ T5042] bpf_test_run+0x499/0xc30 [ 189.517863][ T5042] bpf_prog_test_run_skb+0x14ea/0x1f20 [ 189.523660][ T5042] bpf_prog_test_run+0x6b7/0xad0 [ 189.529042][ T5042] __sys_bpf+0x6aa/0xd90 [ 189.533528][ T5042] __x64_sys_bpf+0xa0/0xe0 [ 189.538175][ T5042] x64_sys_call+0x96b/0x3b50 [ 189.543232][ T5042] do_syscall_64+0xcf/0x1e0 [ 189.548004][ T5042] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.554349][ T5042] [ 189.556814][ T5042] Local variable stack created at: [ 189.562311][ T5042] __bpf_prog_run288+0x45/0xe0 [ 189.567338][ T5042] bpf_test_run+0x499/0xc30 [ 189.572301][ T5042] [ 189.574772][ T5042] CPU: 1 PID: 5042 Comm: syz-executor235 Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 [ 189.585310][ T5042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 189.595710][ T5042] ===================================================== [ 189.602981][ T5042] Disabling lock debugging due to kernel taint [ 189.609430][ T5042] Kernel panic - not syncing: kmsan.panic set ... [ 189.615983][ T5042] CPU: 1 PID: 5042 Comm: syz-executor235 Tainted: G B 6.9.0-syzkaller-02707-g614da38e2f7a #0 [ 189.627717][ T5042] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 189.638121][ T5042] Call Trace: [ 189.641525][ T5042] [ 189.644598][ T5042] dump_stack_lvl+0x216/0x2d0 [ 189.649559][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.655600][ T5042] dump_stack+0x1e/0x30 [ 189.659958][ T5042] panic+0x4e2/0xcd0 [ 189.664127][ T5042] ? kmsan_get_metadata+0xf1/0x1d0 [ 189.669522][ T5042] kmsan_report+0x2d5/0x2e0 [ 189.674280][ T5042] ? __msan_chain_origin+0xc3/0x150 [ 189.679706][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.685162][ T5042] ? __msan_warning+0x95/0x120 [ 189.690137][ T5042] ? bstr_printf+0x19df/0x1b50 [ 189.695159][ T5042] ? bpf_snprintf+0x1c8/0x360 [ 189.700132][ T5042] ? ___bpf_prog_run+0x13fe/0xe0f0 [ 189.705473][ T5042] ? __bpf_prog_run288+0xb5/0xe0 [ 189.710598][ T5042] ? bpf_test_run+0x499/0xc30 [ 189.715446][ T5042] ? bpf_prog_test_run_skb+0x14ea/0x1f20 [ 189.721300][ T5042] ? bpf_prog_test_run+0x6b7/0xad0 [ 189.726646][ T5042] ? __sys_bpf+0x6aa/0xd90 [ 189.731242][ T5042] ? __x64_sys_bpf+0xa0/0xe0 [ 189.736048][ T5042] ? x64_sys_call+0x96b/0x3b50 [ 189.741087][ T5042] ? do_syscall_64+0xcf/0x1e0 [ 189.746006][ T5042] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.752319][ T5042] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 189.758380][ T5042] ? stack_depot_save_flags+0x66d/0x6e0 [ 189.764081][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.769469][ T5042] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 189.775997][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.781357][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.787430][ T5042] ? format_decode+0x1102/0x1580 [ 189.792610][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.798010][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.804016][ T5042] __msan_warning+0x95/0x120 [ 189.808923][ T5042] bstr_printf+0x19df/0x1b50 [ 189.813783][ T5042] bpf_snprintf+0x1c8/0x360 [ 189.818596][ T5042] ___bpf_prog_run+0x13fe/0xe0f0 [ 189.823795][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.829298][ T5042] __bpf_prog_run288+0xb5/0xe0 [ 189.834346][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.840380][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.845761][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.851163][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.857324][ T5042] ? ktime_get+0x4c7/0x530 [ 189.861957][ T5042] ? __pfx___bpf_prog_run288+0x10/0x10 [ 189.867685][ T5042] bpf_test_run+0x499/0xc30 [ 189.872380][ T5042] ? bpf_test_run+0x388/0xc30 [ 189.877251][ T5042] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 189.883253][ T5042] bpf_prog_test_run_skb+0x14ea/0x1f20 [ 189.889067][ T5042] ? kmsan_get_metadata+0x146/0x1d0 [ 189.894540][ T5042] ? __pfx_bpf_prog_test_run_skb+0x10/0x10 [ 189.900629][ T5042] bpf_prog_test_run+0x6b7/0xad0 [ 189.905861][ T5042] __sys_bpf+0x6aa/0xd90 [ 189.910362][ T5042] __x64_sys_bpf+0xa0/0xe0 [ 189.914936][ T5042] x64_sys_call+0x96b/0x3b50 [ 189.919746][ T5042] do_syscall_64+0xcf/0x1e0 [ 189.924675][ T5042] ? clear_bhb_loop+0x25/0x80 [ 189.929646][ T5042] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 189.935819][ T5042] RIP: 0033:0x7f3f33f73db9 [ 189.940369][ T5042] 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 [ 189.960171][ T5042] RSP: 002b:00007ffedd7bf608 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 189.968826][ T5042] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3f33f73db9 [ 189.977011][ T5042] RDX: 000000000000004c RSI: 0000000020000640 RDI: 000000000000000a [ 189.985185][ T5042] RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006 [ 189.993330][ T5042] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 190.001461][ T5042] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 [ 190.009645][ T5042] [ 190.013144][ T5042] Kernel Offset: disabled [ 190.017565][ T5042] Rebooting in 86400 seconds..