./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1189297939 <...> Warning: Permanently added '10.128.1.18' (ED25519) to the list of known hosts. execve("./syz-executor1189297939", ["./syz-executor1189297939"], 0x7ffc55ac3720 /* 10 vars */) = 0 brk(NULL) = 0x555573d6d000 brk(0x555573d6dd00) = 0x555573d6dd00 arch_prctl(ARCH_SET_FS, 0x555573d6d380) = 0 set_tid_address(0x555573d6d650) = 5000 set_robust_list(0x555573d6d660, 24) = 0 rseq(0x555573d6dca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1189297939", 4096) = 28 getrandom("\x8d\x12\x07\x9b\x03\x0d\x80\x1d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573d6dd00 brk(0x555573d8ed00) = 0x555573d8ed00 brk(0x555573d8f000) = 0x555573d8f000 mprotect(0x7fcb9c6c4000, 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=0x555573d6d650) = 5001 ./strace-static-x86_64: Process 5001 attached [pid 5001] set_robust_list(0x555573d6d660, 24) = 0 [pid 5001] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5001] setpgid(0, 0) = 0 [pid 5001] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5001] write(3, "1000", 4) = 4 [pid 5001] close(3) = 0 [pid 5001] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_PERCPU_ARRAY, key_size=4, value_size=3, max_entries=5, map_flags=0, inner_map_fd=-1, 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 5001] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_RAW_TRACEPOINT, insn_cnt=12, insns=0x20000440, 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 [pid 5001] bpf(BPF_RAW_TRACEPOINT_OPEN, {raw_tracepoint={name="ext4_es_insert_delayed_block", prog_fd=4}}, 16) = 5 [pid 5001] openat(AT_FDCWD, "memory.events", O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_APPEND|FASYNC|0x20, 000) = 6 [pid 5001] openat(AT_FDCWD, "memory.events", O_RDWR|__O_SYNC) = 7 [ 150.399688][ T5001] ===================================================== [ 150.407345][ T5001] BUG: KMSAN: uninit-value in percpu_array_map_lookup_elem+0x142/0x160 [ 150.415975][ T5001] percpu_array_map_lookup_elem+0x142/0x160 [ 150.422291][ T5001] bpf_map_lookup_elem+0x5c/0x80 [ 150.427457][ T5001] ___bpf_prog_run+0x13fe/0xe0f0 [ 150.432778][ T5001] __bpf_prog_run64+0xb5/0xe0 [ 150.437648][ T5001] bpf_trace_run3+0x132/0x320 [ 150.442697][ T5001] __bpf_trace_ext4_es_insert_delayed_block+0x34/0x50 [ 150.449685][ T5001] ext4_es_insert_delayed_block+0x11e1/0x1290 [ 150.456199][ T5001] ext4_da_get_block_prep+0x1714/0x1d30 [ 150.461973][ T5001] ext4_block_write_begin+0x749/0x1df0 [ 150.467899][ T5001] ext4_da_write_begin+0x889/0xec0 [ 150.473359][ T5001] generic_perform_write+0x400/0xc60 [ 150.478843][ T5001] ext4_buffered_write_iter+0x564/0xaa0 [ 150.484744][ T5001] ext4_file_write_iter+0x208/0x3450 [ 150.490229][ T5001] vfs_write+0xb63/0x1520 [ 150.494858][ T5001] ksys_write+0x20f/0x4c0 [ 150.499383][ T5001] __x64_sys_write+0x93/0xe0 [ 150.504328][ T5001] do_syscall_64+0xd5/0x1f0 [ 150.509075][ T5001] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 150.515375][ T5001] [ 150.517824][ T5001] Local variable stack created at: [ 150.523263][ T5001] __bpf_prog_run64+0x45/0xe0 [ 150.528114][ T5001] bpf_trace_run3+0x132/0x320 [ 150.533037][ T5001] [ 150.535460][ T5001] CPU: 1 PID: 5001 Comm: syz-executor118 Not tainted 6.8.0-syzkaller-09791-ge5eb28f6d1af #0 [ 150.545861][ T5001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 150.556167][ T5001] ===================================================== [ 150.563606][ T5001] Disabling lock debugging due to kernel taint [ 150.569858][ T5001] Kernel panic - not syncing: kmsan.panic set ... [ 150.576351][ T5001] CPU: 1 PID: 5001 Comm: syz-executor118 Tainted: G B 6.8.0-syzkaller-09791-ge5eb28f6d1af #0 [ 150.588005][ T5001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 150.598168][ T5001] Call Trace: [ 150.601539][ T5001] [ 150.604555][ T5001] dump_stack_lvl+0x216/0x2d0 [ 150.609468][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.615541][ T5001] dump_stack+0x1e/0x30 [ 150.619918][ T5001] panic+0x4e2/0xcd0 [ 150.624011][ T5001] ? kmsan_get_metadata+0xc1/0x1d0 [ 150.629306][ T5001] kmsan_report+0x2d5/0x2e0 [ 150.634033][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.640058][ T5001] ? __msan_warning+0x95/0x120 [ 150.644970][ T5001] ? percpu_array_map_lookup_elem+0x142/0x160 [ 150.651249][ T5001] ? bpf_map_lookup_elem+0x5c/0x80 [ 150.656559][ T5001] ? ___bpf_prog_run+0x13fe/0xe0f0 [ 150.661874][ T5001] ? __bpf_prog_run64+0xb5/0xe0 [ 150.666844][ T5001] ? bpf_trace_run3+0x132/0x320 [ 150.671820][ T5001] ? __bpf_trace_ext4_es_insert_delayed_block+0x34/0x50 [ 150.678987][ T5001] ? ext4_es_insert_delayed_block+0x11e1/0x1290 [ 150.685485][ T5001] ? ext4_da_get_block_prep+0x1714/0x1d30 [ 150.691573][ T5001] ? ext4_block_write_begin+0x749/0x1df0 [ 150.697372][ T5001] ? ext4_da_write_begin+0x889/0xec0 [ 150.702879][ T5001] ? generic_perform_write+0x400/0xc60 [ 150.708492][ T5001] ? ext4_buffered_write_iter+0x564/0xaa0 [ 150.714439][ T5001] ? ext4_file_write_iter+0x208/0x3450 [ 150.720227][ T5001] ? vfs_write+0xb63/0x1520 [ 150.724931][ T5001] ? ksys_write+0x20f/0x4c0 [ 150.729637][ T5001] ? __x64_sys_write+0x93/0xe0 [ 150.734543][ T5001] ? do_syscall_64+0xd5/0x1f0 [ 150.739404][ T5001] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 150.745657][ T5001] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 150.752074][ T5001] ? kmsan_internal_poison_memory+0x7d/0x90 [ 150.758179][ T5001] ? kmsan_internal_poison_memory+0x49/0x90 [ 150.764513][ T5001] ? kmsan_slab_free+0xd6/0x140 [ 150.769605][ T5001] ? kfree+0x20c/0xa30 [ 150.773995][ T5001] ? ext4_ext_map_blocks+0x6f5f/0xa000 [ 150.779694][ T5001] ? ext4_da_get_block_prep+0x8cc/0x1d30 [ 150.785484][ T5001] ? ext4_block_write_begin+0x749/0x1df0 [ 150.791362][ T5001] ? ext4_da_write_begin+0x889/0xec0 [ 150.796816][ T5001] ? generic_perform_write+0x400/0xc60 [ 150.802482][ T5001] ? ext4_buffered_write_iter+0x564/0xaa0 [ 150.808706][ T5001] ? ext4_file_write_iter+0x208/0x3450 [ 150.814311][ T5001] ? vfs_write+0xb63/0x1520 [ 150.819011][ T5001] ? ksys_write+0x20f/0x4c0 [ 150.823714][ T5001] ? __x64_sys_write+0x93/0xe0 [ 150.828780][ T5001] ? do_syscall_64+0xd5/0x1f0 [ 150.833605][ T5001] ? entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 150.839836][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 150.845209][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.851193][ T5001] ? kfree+0x18c/0xa30 [ 150.855405][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 150.860799][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.866775][ T5001] __msan_warning+0x95/0x120 [ 150.871494][ T5001] percpu_array_map_lookup_elem+0x142/0x160 [ 150.877577][ T5001] ? __pfx_percpu_array_map_lookup_elem+0x10/0x10 [ 150.884251][ T5001] bpf_map_lookup_elem+0x5c/0x80 [ 150.889395][ T5001] ___bpf_prog_run+0x13fe/0xe0f0 [ 150.894446][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 150.899885][ T5001] __bpf_prog_run64+0xb5/0xe0 [ 150.904763][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.910813][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.916837][ T5001] ? __pfx___bpf_prog_run64+0x10/0x10 [ 150.922352][ T5001] ? __pfx___bpf_prog_run64+0x10/0x10 [ 150.928544][ T5001] bpf_trace_run3+0x132/0x320 [ 150.933352][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 150.938796][ T5001] __bpf_trace_ext4_es_insert_delayed_block+0x34/0x50 [ 150.945785][ T5001] ext4_es_insert_delayed_block+0x11e1/0x1290 [ 150.952036][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 150.957558][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 150.963542][ T5001] ? _raw_spin_unlock+0x30/0x50 [ 150.968558][ T5001] ? ext4_da_reserve_space+0x2e9/0x4c0 [ 150.974197][ T5001] ext4_da_get_block_prep+0x1714/0x1d30 [ 150.979962][ T5001] ext4_block_write_begin+0x749/0x1df0 [ 150.985630][ T5001] ? __pfx_ext4_da_get_block_prep+0x10/0x10 [ 150.991710][ T5001] ? folio_wait_stable+0xa1/0xe0 [ 150.996823][ T5001] ext4_da_write_begin+0x889/0xec0 [ 151.002196][ T5001] ? __pfx_ext4_da_write_begin+0x10/0x10 [ 151.008070][ T5001] generic_perform_write+0x400/0xc60 [ 151.013632][ T5001] ext4_buffered_write_iter+0x564/0xaa0 [ 151.019358][ T5001] ? __schedule+0x22df/0x6b70 [ 151.024236][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 151.029737][ T5001] ext4_file_write_iter+0x208/0x3450 [ 151.035272][ T5001] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 151.041302][ T5001] ? vfs_write+0x553/0x1520 [ 151.045935][ T5001] ? filter_irq_stacks+0x60/0x1a0 [ 151.051129][ T5001] ? stack_depot_save_flags+0x2c/0x6e0 [ 151.056802][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 151.062260][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 151.068109][ T5001] ? kmsan_get_metadata+0x146/0x1d0 [ 151.073490][ T5001] ? __pfx_ext4_file_write_iter+0x10/0x10 [ 151.079505][ T5001] vfs_write+0xb63/0x1520 [ 151.084195][ T5001] ksys_write+0x20f/0x4c0 [ 151.088662][ T5001] __x64_sys_write+0x93/0xe0 [ 151.093496][ T5001] do_syscall_64+0xd5/0x1f0 [ 151.098264][ T5001] entry_SYSCALL_64_after_hwframe+0x6d/0x75 [ 151.104676][ T5001] RIP: 0033:0x7fcb9c650cb9 [ 151.109283][ T5001] 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 [ 151.129138][ T5001] RSP: 002b:00007fff05e68868 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 151.137717][ T5001] RAX: ffffffffffffffda RBX: 0073746e6576652e RCX: 00007fcb9c650cb9 [ 151.145957][ T5001] RDX: 0000000000002000 RSI: 0000000020000180 RDI: 0000000000000007 [ 151.154106][ T5001] RBP: 652e79726f6d656d R08: 0000000000000006 R09: 0000000000000006 [ 151.162310][ T5001] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000 [ 151.170384][ T5001] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 [ 151.179106][ T5001] [ 151.182386][ T5001] Kernel Offset: disabled [ 151.186812][ T5001] Rebooting in 86400 seconds..