./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor938134034 <...> Warning: Permanently added '10.128.10.12' (ED25519) to the list of known hosts. execve("./syz-executor938134034", ["./syz-executor938134034"], 0x7ffc17b62bb0 /* 10 vars */) = 0 brk(NULL) = 0x5555573da000 brk(0x5555573dad00) = 0x5555573dad00 arch_prctl(ARCH_SET_FS, 0x5555573da380) = 0 set_tid_address(0x5555573da650) = 5018 set_robust_list(0x5555573da660, 24) = 0 rseq(0x5555573daca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor938134034", 4096) = 27 getrandom("\xcb\x6d\x09\xed\x20\xda\x8a\x7d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555573dad00 brk(0x5555573fbd00) = 0x5555573fbd00 brk(0x5555573fc000) = 0x5555573fc000 mprotect(0x7f687c82d000, 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=0x5555573da650) = 5019 ./strace-static-x86_64: Process 5019 attached [pid 5019] set_robust_list(0x5555573da660, 24) = 0 [pid 5019] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5019] setpgid(0, 0) = 0 [pid 5019] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5019] write(3, "1000", 4) = 4 [pid 5019] close(3) = 0 [pid 5019] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SOCKET_FILTER, insn_cnt=8, insns=0x20000180, 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}, 72) = 3 [ 156.486524][ T5019] ===================================================== [ 156.493840][ T5019] BUG: KMSAN: uninit-value in strnchr+0x90/0xd0 [ 156.500368][ T5019] strnchr+0x90/0xd0 [ 156.504470][ T5019] bpf_bprintf_prepare+0x1c2/0x23b0 [ 156.510123][ T5019] bpf_trace_printk+0xec/0x3e0 [ 156.515094][ T5019] ___bpf_prog_run+0x2180/0xdb80 [ 156.520317][ T5019] __bpf_prog_run32+0xb2/0xe0 [ 156.525194][ T5019] bpf_test_run+0x482/0xaf0 [ 156.530082][ T5019] bpf_prog_test_run_skb+0x14e5/0x1f20 [ 156.535742][ T5019] bpf_prog_test_run+0x6af/0xac0 [ 156.540905][ T5019] __sys_bpf+0x649/0xd60 [ 156.545359][ T5019] __x64_sys_bpf+0xa0/0xe0 [ 156.550150][ T5019] do_syscall_64+0xcf/0x1e0 [ 156.554843][ T5019] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.561107][ T5019] [ 156.563542][ T5019] Local variable stack created at: [ 156.568724][ T5019] __bpf_prog_run32+0x43/0xe0 [ 156.573624][ T5019] bpf_test_run+0x482/0xaf0 [ 156.578331][ T5019] [ 156.580904][ T5019] CPU: 0 PID: 5019 Comm: syz-executor938 Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0 [ 156.591543][ T5019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 156.601852][ T5019] ===================================================== [ 156.608867][ T5019] Disabling lock debugging due to kernel taint [ 156.615245][ T5019] Kernel panic - not syncing: kmsan.panic set ... [ 156.621756][ T5019] CPU: 0 PID: 5019 Comm: syz-executor938 Tainted: G B 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0 [ 156.633780][ T5019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 156.643960][ T5019] Call Trace: [ 156.647360][ T5019] [ 156.650378][ T5019] dump_stack_lvl+0x1bf/0x240 [ 156.655174][ T5019] dump_stack+0x1e/0x20 [ 156.659450][ T5019] panic+0x4de/0xc90 [ 156.663570][ T5019] kmsan_report+0x2d0/0x2d0 [ 156.668273][ T5019] ? __msan_warning+0x96/0x120 [ 156.673223][ T5019] ? strnchr+0x90/0xd0 [ 156.677518][ T5019] ? bpf_bprintf_prepare+0x1c2/0x23b0 [ 156.683101][ T5019] ? bpf_trace_printk+0xec/0x3e0 [ 156.688146][ T5019] ? ___bpf_prog_run+0x2180/0xdb80 [ 156.693357][ T5019] ? __bpf_prog_run32+0xb2/0xe0 [ 156.698326][ T5019] ? bpf_test_run+0x482/0xaf0 [ 156.703132][ T5019] ? bpf_prog_test_run_skb+0x14e5/0x1f20 [ 156.708922][ T5019] ? bpf_prog_test_run+0x6af/0xac0 [ 156.714280][ T5019] ? __sys_bpf+0x649/0xd60 [ 156.718869][ T5019] ? __x64_sys_bpf+0xa0/0xe0 [ 156.723664][ T5019] ? do_syscall_64+0xcf/0x1e0 [ 156.728547][ T5019] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.734861][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.740261][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.745657][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.750976][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.756286][ T5019] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 156.762758][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.768066][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 156.774023][ T5019] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 156.780098][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.785412][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.790800][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 156.796853][ T5019] __msan_warning+0x96/0x120 [ 156.801595][ T5019] strnchr+0x90/0xd0 [ 156.805696][ T5019] bpf_bprintf_prepare+0x1c2/0x23b0 [ 156.811168][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.816533][ T5019] ? kmsan_internal_memmove_metadata+0x91/0x230 [ 156.822975][ T5019] ? __msan_memcpy+0x108/0x1c0 [ 156.828010][ T5019] bpf_trace_printk+0xec/0x3e0 [ 156.832999][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 156.839007][ T5019] ___bpf_prog_run+0x2180/0xdb80 [ 156.844087][ T5019] ? stack_depot_save_flags+0x665/0x6e0 [ 156.849887][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.855283][ T5019] __bpf_prog_run32+0xb2/0xe0 [ 156.860095][ T5019] ? ktime_get+0x37d/0x460 [ 156.864674][ T5019] ? ___bpf_prog_run+0xdb80/0xdb80 [ 156.869986][ T5019] bpf_test_run+0x482/0xaf0 [ 156.874687][ T5019] ? bpf_test_run+0x381/0xaf0 [ 156.879594][ T5019] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 156.885551][ T5019] bpf_prog_test_run_skb+0x14e5/0x1f20 [ 156.891201][ T5019] ? kmsan_get_metadata+0x146/0x1c0 [ 156.896541][ T5019] ? __bpf_prog_test_run_raw_tp+0x2c0/0x2c0 [ 156.902638][ T5019] bpf_prog_test_run+0x6af/0xac0 [ 156.907731][ T5019] __sys_bpf+0x649/0xd60 [ 156.912194][ T5019] __x64_sys_bpf+0xa0/0xe0 [ 156.916731][ T5019] do_syscall_64+0xcf/0x1e0 [ 156.921377][ T5019] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 156.927469][ T5019] RIP: 0033:0x7f687c7babb9 [ 156.932025][ T5019] 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 [ 156.951833][ T5019] RSP: 002b:00007fffc8562988 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 156.960396][ T5019] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f687c7babb9 [ 156.968503][ T5019] RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a [ 156.976583][ T5019] RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006 [ 156.984719][ T5019] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 156.992821][ T5019] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 [ 157.000925][ T5019] [ 157.004350][ T5019] Kernel Offset: disabled [ 157.008742][ T5019] Rebooting in 86400 seconds..