./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3774971707 <...> Warning: Permanently added '10.128.1.135' (ED25519) to the list of known hosts. execve("./syz-executor3774971707", ["./syz-executor3774971707"], 0x7fff593a1710 /* 10 vars */) = 0 brk(NULL) = 0x555557406000 brk(0x555557406d00) = 0x555557406d00 arch_prctl(ARCH_SET_FS, 0x555557406380) = 0 set_tid_address(0x555557406650) = 5017 set_robust_list(0x555557406660, 24) = 0 rseq(0x555557406ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3774971707", 4096) = 28 getrandom("\x77\x83\x6a\xb9\x3a\x3f\x49\x30", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557406d00 brk(0x555557427d00) = 0x555557427d00 brk(0x555557428000) = 0x555557428000 mprotect(0x7f65bbe66000, 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=0x555557406650) = 5018 ./strace-static-x86_64: Process 5018 attached [pid 5018] set_robust_list(0x555557406660, 24) = 0 [pid 5018] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5018] setpgid(0, 0) = 0 [pid 5018] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5018] write(3, "1000", 4) = 4 [pid 5018] close(3) = 0 [pid 5018] 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=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 [pid 5018] bpf(BPF_MAP_UPDATE_ELEM, {map_fd=3, key=0x20000100, value=0x20000140, flags=BPF_ANY}, 32) = 0 [pid 5018] bpf(BPF_MAP_FREEZE, {map_fd=3}, 4) = 0 [pid 5018] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_FLOW_DISSECTOR, insn_cnt=16, insns=0x20000040, 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=0, 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 [ 147.580292][ T5018] ===================================================== [ 147.588154][ T5018] BUG: KMSAN: uninit-value in bpf_bprintf_prepare+0x1ec4/0x23b0 [ 147.596410][ T5018] bpf_bprintf_prepare+0x1ec4/0x23b0 [ 147.601997][ T5018] bpf_snprintf+0x141/0x360 [ 147.606706][ T5018] ___bpf_prog_run+0x2180/0xdb80 [ 147.611897][ T5018] __bpf_prog_run288+0xb5/0xe0 [ 147.616815][ T5018] bpf_flow_dissect+0x127/0x470 [ 147.621938][ T5018] bpf_prog_test_run_flow_dissector+0x6f4/0xa20 [ 147.628419][ T5018] bpf_prog_test_run+0x6af/0xac0 [ 147.633634][ T5018] __sys_bpf+0x649/0xd60 [ 147.638056][ T5018] __x64_sys_bpf+0xa0/0xe0 [ 147.642783][ T5018] do_syscall_64+0xcf/0x1e0 [ 147.647451][ T5018] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 147.653746][ T5018] [ 147.656162][ T5018] Local variable stack created at: [ 147.661357][ T5018] __bpf_prog_run288+0x45/0xe0 [ 147.666318][ T5018] bpf_flow_dissect+0x127/0x470 [ 147.671349][ T5018] [ 147.673853][ T5018] CPU: 0 PID: 5018 Comm: syz-executor377 Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0 [ 147.684536][ T5018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 147.694817][ T5018] ===================================================== [ 147.701961][ T5018] Disabling lock debugging due to kernel taint [ 147.708228][ T5018] Kernel panic - not syncing: kmsan.panic set ... [ 147.714769][ T5018] CPU: 0 PID: 5018 Comm: syz-executor377 Tainted: G B 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0 [ 147.726837][ T5018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 147.737009][ T5018] Call Trace: [ 147.740372][ T5018] [ 147.743360][ T5018] dump_stack_lvl+0x1bf/0x240 [ 147.748178][ T5018] dump_stack+0x1e/0x20 [ 147.752521][ T5018] panic+0x4de/0xc90 [ 147.756621][ T5018] kmsan_report+0x2d0/0x2d0 [ 147.761246][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.767211][ T5018] ? __msan_warning+0x96/0x120 [ 147.772161][ T5018] ? bpf_bprintf_prepare+0x1ec4/0x23b0 [ 147.777835][ T5018] ? bpf_snprintf+0x141/0x360 [ 147.782647][ T5018] ? ___bpf_prog_run+0x2180/0xdb80 [ 147.787906][ T5018] ? __bpf_prog_run288+0xb5/0xe0 [ 147.793041][ T5018] ? bpf_flow_dissect+0x127/0x470 [ 147.798225][ T5018] ? bpf_prog_test_run_flow_dissector+0x6f4/0xa20 [ 147.804782][ T5018] ? bpf_prog_test_run+0x6af/0xac0 [ 147.810041][ T5018] ? __sys_bpf+0x649/0xd60 [ 147.814651][ T5018] ? __x64_sys_bpf+0xa0/0xe0 [ 147.819433][ T5018] ? do_syscall_64+0xcf/0x1e0 [ 147.824292][ T5018] ? entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 147.830601][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.836020][ T5018] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 147.842523][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.847894][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.853850][ T5018] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 147.859915][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.865391][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.870743][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.876681][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.882049][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.888008][ T5018] __msan_warning+0x96/0x120 [ 147.893182][ T5018] bpf_bprintf_prepare+0x1ec4/0x23b0 [ 147.898717][ T5018] ? __msan_memcpy+0x108/0x1c0 [ 147.903730][ T5018] bpf_snprintf+0x141/0x360 [ 147.908467][ T5018] ___bpf_prog_run+0x2180/0xdb80 [ 147.913563][ T5018] ? stack_depot_save_flags+0x665/0x6e0 [ 147.919273][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.924678][ T5018] __bpf_prog_run288+0xb5/0xe0 [ 147.929555][ T5018] ? zlib_tr_flush_block+0x26af/0x3cb0 [ 147.935183][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.941203][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.946585][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.952575][ T5018] ? kmsan_get_metadata+0x146/0x1c0 [ 147.957975][ T5018] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 147.963978][ T5018] ? zlib_tr_flush_block+0x26af/0x3cb0 [ 147.969607][ T5018] ? __bpf_prog_run256+0xe0/0xe0 [ 147.974711][ T5018] ? __bpf_prog_run256+0xe0/0xe0 [ 147.979757][ T5018] bpf_flow_dissect+0x127/0x470 [ 147.984781][ T5018] bpf_prog_test_run_flow_dissector+0x6f4/0xa20 [ 147.991317][ T5018] ? xdp_convert_buff_to_md+0x2a0/0x2a0 [ 147.997076][ T5018] bpf_prog_test_run+0x6af/0xac0 [ 148.002155][ T5018] __sys_bpf+0x649/0xd60 [ 148.006534][ T5018] __x64_sys_bpf+0xa0/0xe0 [ 148.011063][ T5018] do_syscall_64+0xcf/0x1e0 [ 148.015679][ T5018] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 148.021732][ T5018] RIP: 0033:0x7f65bbdf2d39 [ 148.026296][ T5018] 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 [ 148.046074][ T5018] RSP: 002b:00007ffced8ac6a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 148.054682][ T5018] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65bbdf2d39 [ 148.062788][ T5018] RDX: 0000000000000050 RSI: 0000000020000640 RDI: 000000000000000a [ 148.070868][ T5018] RBP: 0000000000000000 R08: 0000000000000006 R09: 0000000000000006 [ 148.079000][ T5018] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 148.087094][ T5018] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 [ 148.095195][ T5018] [ 148.098601][ T5018] Kernel Offset: disabled [ 148.102983][ T5018] Rebooting in 86400 seconds..