./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2675476077 <...> Warning: Permanently added '10.128.0.123' (ED25519) to the list of known hosts. execve("./syz-executor2675476077", ["./syz-executor2675476077"], 0x7ffc5e36d410 /* 10 vars */) = 0 brk(NULL) = 0x555572dfb000 brk(0x555572dfbd00) = 0x555572dfbd00 arch_prctl(ARCH_SET_FS, 0x555572dfb380) = 0 set_tid_address(0x555572dfb650) = 356 set_robust_list(0x555572dfb660, 24) = 0 rseq(0x555572dfbca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2675476077", 4096) = 28 getrandom("\xe9\x4c\xf3\x54\x61\xc9\xfd\x75", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555572dfbd00 brk(0x555572e1cd00) = 0x555572e1cd00 brk(0x555572e1d000) = 0x555572e1d000 mprotect(0x7fe2084a7000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555572dfb650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555572dfb660, 24) = 0 [pid 357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 357] setpgid(0, 0) = 0 [pid 357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 357] write(3, "1000", 4) = 4 [pid 357] close(3) = 0 [pid 357] write(1, "executing program\n", 18executing program ) = 18 [pid 357] openat(AT_FDCWD, "/dev/kvm", O_RDWR|O_CREAT|O_TRUNC|O_APPEND|O_SYNC|O_NOFOLLOW|O_NOATIME, 000) = 3 [ 23.690334][ T23] audit: type=1400 audit(1743832537.540:66): avc: denied { execmem } for pid=356 comm="syz-executor267" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.716007][ T23] audit: type=1400 audit(1743832537.570:67): avc: denied { read append } for pid=357 comm="syz-executor267" name="kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.722198][ T357] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. [ 23.739326][ T23] audit: type=1400 audit(1743832537.570:68): avc: denied { open } for pid=357 comm="syz-executor267" path="/dev/kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 357] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 357] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [pid 357] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=8192, userspace_addr=0x200000000000}) = 0 [pid 357] ioctl(5, KVM_SET_REGS, NULL) = -1 EFAULT (Bad address) [ 23.739350][ T23] audit: type=1400 audit(1743832537.570:69): avc: denied { ioctl } for pid=357 comm="syz-executor267" path="/dev/kvm" dev="devtmpfs" ino=116 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.820525][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.828258][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.834576][ T357] #PF: error_code(0x0010) - not-present page [ 23.840811][ T357] PGD 0 P4D 0 [ 23.844036][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.849062][ T357] CPU: 1 PID: 357 Comm: syz-executor267 Not tainted 5.4.290-syzkaller-00002-g41adfeb3d639 #0 [ 23.859146][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 23.869149][ T357] RIP: 0010:0x86 [ 23.872640][ T357] Code: Bad RIP value. [ 23.876532][ T357] RSP: 0018:ffff8881ee487308 EFLAGS: 00010086 [ 23.882436][ T357] RAX: ffff8881ee487338 RBX: dffffc0000000000 RCX: ffff8881f32d8000 [ 23.890363][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.898181][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 23.905980][ T357] R10: ffff8881f32d8000 R11: 0000000000000002 R12: ffffffff84600228 [ 23.913925][ T357] R13: fffffe0000000278 R14: ffff8881ee448000 R15: fffffe000000027b [ 23.921736][ T357] FS: 0000555572dfb380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.930497][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.936920][ T357] CR2: 000000000000005c CR3: 00000001e02eb000 CR4: 00000000003426a0 [ 23.944733][ T357] Call Trace: [ 23.947865][ T357] ? __die+0xb4/0x100 [ 23.951677][ T357] ? no_context+0xac7/0xd20 [ 23.956039][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.960441][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.965913][ T357] ? __do_page_fault+0xa72/0xbb0 [ 23.970692][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.976250][ T357] ? __bad_area_nosemaphore+0xc0/0x470 [ 23.981538][ T357] ? page_fault+0x2f/0x40 [ 23.985700][ T357] ? irq_entries_start+0x38/0x660 [ 23.990566][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.995862][ T357] ? check_preemption_disabled+0x91/0x320 [ 24.001417][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 24.007838][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 24.014116][ T357] ? irq_entries_start+0x38/0x660 [ 24.018978][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 24.023994][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.029908][ T357] ? unwind_get_return_address_ptr+0xa0/0xa0 [ 24.036061][ T357] ? local_bh_enable+0x20/0x20 [ 24.040649][ T357] ? __free_one_page+0x7f3/0xa60 [ 24.045434][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.051323][ T357] ? _raw_spin_unlock+0x49/0x60 [ 24.056084][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.061680][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.067391][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.072596][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.077799][ T357] ? stack_trace_save+0x1c0/0x1c0 [ 24.082798][ T357] ? llist_add_batch+0x91/0xb0 [ 24.087390][ T357] ? generic_exec_single+0x280/0x3e0 [ 24.092579][ T357] ? smp_call_function_single+0x4a0/0x4a0 [ 24.098198][ T357] ? update_load_avg+0x40f/0x1210 [ 24.102998][ T357] ? smp_call_function_single+0x388/0x4a0 [ 24.108635][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 24.113843][ T357] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 24.120797][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.126351][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 24.131126][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.136410][ T357] ? get_cpu_entry_area+0x8/0x30 [ 24.141357][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 24.146394][ T357] ? read_msr+0x40/0x40 [ 24.150562][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.156115][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.161500][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.167055][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.171831][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.176513][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.181461][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.186843][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.192233][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.197799][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 24.203191][ T357] ? ptrace_stop+0x6ee/0xa30 [ 24.207598][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.212280][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 24.216881][ T357] ? ioctl_preallocate+0x250/0x250 [ 24.222094][ T357] ? check_preemption_disabled+0x153/0x320 [ 24.227732][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.233035][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 24.237628][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.242595][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.247542][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.252227][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.256730][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.262639][ T357] Modules linked in: [ 24.266354][ T357] CR2: 0000000000000086 [ 24.270355][ T357] ---[ end trace 74320e8eebc6efbb ]--- [ 24.275652][ T357] RIP: 0010:0x86 [ 24.279032][ T357] Code: Bad RIP value. [ 24.282939][ T357] RSP: 0018:ffff8881ee487308 EFLAGS: 00010086 [ 24.288845][ T357] RAX: ffff8881ee487338 RBX: dffffc0000000000 RCX: ffff8881f32d8000 [ 24.296916][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.304824][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 24.313060][ T357] R10: ffff8881f32d8000 R11: 0000000000000002 R12: ffffffff84600228 [ 24.321052][ T357] R13: fffffe0000000278 R14: ffff8881ee448000 R15: fffffe000000027b [ 24.328850][ T357] FS: 0000555572dfb380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.337703][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.344135][ T357] CR2: 000000000000005c CR3: 00000001e02eb000 CR4: 00000000003426a0 [ 24.352046][ T357] Kernel panic - not syncing: Fatal exception [ 24.358166][ T357] Kernel Offset: disabled [ 24.362288][ T357] Rebooting in 86400 seconds..