./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor787159097 <...> Warning: Permanently added '10.128.1.137' (ED25519) to the list of known hosts. execve("./syz-executor787159097", ["./syz-executor787159097"], 0x7ffd76267140 /* 10 vars */) = 0 brk(NULL) = 0x555555617000 brk(0x555555617d00) = 0x555555617d00 arch_prctl(ARCH_SET_FS, 0x555555617380) = 0 set_tid_address(0x555555617650) = 356 set_robust_list(0x555555617660, 24) = 0 rseq(0x555555617ca0, 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-executor787159097", 4096) = 27 getrandom("\xbc\xe8\xea\xc7\x04\xff\xde\xfe", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555617d00 brk(0x555555638d00) = 0x555555638d00 brk(0x555555639000) = 0x555555639000 mprotect(0x7ff6c0df7000, 16384, PROT_READ) = 0 mmap(0x3ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3ffffffff000 mmap(0x400000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400000000000 mmap(0x400001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x400001000000 write(1, "executing program\n", 18executing program ) = 18 openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 23.024529][ T23] audit: type=1400 audit(1739767512.910:66): avc: denied { execmem } for pid=356 comm="syz-executor787" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.033580][ T356] 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. [ 23.043788][ T23] audit: type=1400 audit(1739767512.920:67): avc: denied { read } for pid=356 comm="syz-executor787" name="kvm" dev="devtmpfs" ino=1121 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.043805][ T23] audit: type=1400 audit(1739767512.920:68): avc: denied { open } for pid=356 comm="syz-executor787" path="/dev/kvm" dev="devtmpfs" ino=1121 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 ioctl(3, KVM_CREATE_VM, 0) = 4 ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x400000000000}) = 0 ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 23.043822][ T23] audit: type=1400 audit(1739767512.920:69): avc: denied { ioctl } for pid=356 comm="syz-executor787" path="/dev/kvm" dev="devtmpfs" ino=1121 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.145240][ T356] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.152862][ T356] #PF: supervisor instruction fetch in kernel mode [ 23.159196][ T356] #PF: error_code(0x0010) - not-present page [ 23.165023][ T356] PGD 0 P4D 0 [ 23.168226][ T356] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.173264][ T356] CPU: 1 PID: 356 Comm: syz-executor787 Not tainted 5.4.289-syzkaller-00011-g39762b7a60e9 #0 [ 23.183242][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 23.193419][ T356] RIP: 0010:0x86 [ 23.196788][ T356] Code: Bad RIP value. [ 23.200689][ T356] RSP: 0018:ffff8881ef7cf308 EFLAGS: 00010086 [ 23.206594][ T356] RAX: ffff8881ef7cf338 RBX: dffffc0000000000 RCX: ffff8881ef6e0fc0 [ 23.214413][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.222216][ T356] RBP: 0000000000000ec0 R08: ffffffff8231cac1 R09: ffffffff811c8f95 [ 23.230140][ T356] R10: ffff8881ef6e0fc0 R11: 0000000000000002 R12: ffffffff84601550 [ 23.237951][ T356] R13: fffffe0000000ec8 R14: ffff8881d9078000 R15: fffffe0000000ecb [ 23.245850][ T356] FS: 0000555555617380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.254703][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.261127][ T356] CR2: 000000000000005c CR3: 00000001efb6a000 CR4: 00000000003426a0 [ 23.268939][ T356] Call Trace: [ 23.272073][ T356] ? __die+0xb4/0x100 [ 23.275889][ T356] ? no_context+0xac7/0xd20 [ 23.280319][ T356] ? is_prefetch+0x4b0/0x4b0 [ 23.284739][ T356] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.290118][ T356] ? __do_page_fault+0xa72/0xbb0 [ 23.294902][ T356] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.300451][ T356] ? __bad_area_nosemaphore+0xc0/0x470 [ 23.305748][ T356] ? page_fault+0x2f/0x40 [ 23.309925][ T356] ? __entry_text_end+0x4/0x4 [ 23.314425][ T356] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.319807][ T356] ? check_preemption_disabled+0x91/0x320 [ 23.325398][ T356] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.331611][ T356] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.337858][ T356] ? __entry_text_end+0x4/0x4 [ 23.342373][ T356] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.347422][ T356] ? update_rq_clock+0x67/0x350 [ 23.352104][ T356] ? local_bh_enable+0x20/0x20 [ 23.356720][ T356] ? update_blocked_averages+0xd50/0xd50 [ 23.362265][ T356] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.367394][ T356] ? read_msr+0x40/0x40 [ 23.371365][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.377166][ T356] ? kvm_sched_clock_read+0x14/0x40 [ 23.382201][ T356] ? check_preemption_disabled+0x9f/0x320 [ 23.387755][ T356] ? debug_smp_processor_id+0x20/0x20 [ 23.392967][ T356] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.398522][ T356] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.403206][ T356] ? create_vcpu_fd+0x120/0x120 [ 23.407894][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.412840][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.418320][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 23.423527][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 23.428839][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 23.433944][ T356] ? ptrace_stop+0x6ee/0xa30 [ 23.438362][ T356] ? create_vcpu_fd+0x120/0x120 [ 23.443056][ T356] ? do_vfs_ioctl+0x742/0x1720 [ 23.447647][ T356] ? ioctl_preallocate+0x250/0x250 [ 23.452603][ T356] ? check_preemption_disabled+0x153/0x320 [ 23.458243][ T356] ? syscall_trace_enter+0x650/0x940 [ 23.463366][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 23.467963][ T356] ? switch_fpu_return+0x1d4/0x410 [ 23.472910][ T356] ? security_file_ioctl+0x7d/0xa0 [ 23.477857][ T356] ? __x64_sys_ioctl+0xd4/0x110 [ 23.482546][ T356] ? do_syscall_64+0xca/0x1c0 [ 23.487061][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.492954][ T356] Modules linked in: [ 23.496687][ T356] CR2: 0000000000000086 [ 23.500681][ T356] ---[ end trace 2fa21f15f7e7a836 ]--- [ 23.505976][ T356] RIP: 0010:0x86 [ 23.509366][ T356] Code: Bad RIP value. [ 23.513268][ T356] RSP: 0018:ffff8881ef7cf308 EFLAGS: 00010086 [ 23.519172][ T356] RAX: ffff8881ef7cf338 RBX: dffffc0000000000 RCX: ffff8881ef6e0fc0 [ 23.526983][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.534793][ T356] RBP: 0000000000000ec0 R08: ffffffff8231cac1 R09: ffffffff811c8f95 [ 23.542605][ T356] R10: ffff8881ef6e0fc0 R11: 0000000000000002 R12: ffffffff84601550 [ 23.550423][ T356] R13: fffffe0000000ec8 R14: ffff8881d9078000 R15: fffffe0000000ecb [ 23.558231][ T356] FS: 0000555555617380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.567030][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.573681][ T356] CR2: 000000000000005c CR3: 00000001efb6a000 CR4: 00000000003426a0 [ 23.581622][ T356] Kernel panic - not syncing: Fatal exception [ 23.587754][ T356] Kernel Offset: disabled [ 23.591877][ T356] Rebooting in 86400 seconds..