./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1908024316 <...> Warning: Permanently added '10.128.0.134' (ED25519) to the list of known hosts. execve("./syz-executor1908024316", ["./syz-executor1908024316"], 0x7ffd91a53f10 /* 10 vars */) = 0 brk(NULL) = 0x555568c19000 brk(0x555568c19d00) = 0x555568c19d00 arch_prctl(ARCH_SET_FS, 0x555568c19380) = 0 set_tid_address(0x555568c19650) = 358 set_robust_list(0x555568c19660, 24) = 0 rseq(0x555568c19ca0, 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-executor1908024316", 4096) = 28 getrandom("\x3b\x3e\x7d\x54\x49\x06\x36\xf9", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555568c19d00 brk(0x555568c3ad00) = 0x555568c3ad00 brk(0x555568c3b000) = 0x555568c3b000 mprotect(0x7f830d0a5000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555568c19650) = 359 ./strace-static-x86_64: Process 359 attached [pid 359] set_robust_list(0x555568c19660, 24) = 0 [pid 359] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 359] setpgid(0, 0) = 0 [pid 359] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 359] write(3, "1000", 4) = 4 [pid 359] close(3) = 0 [pid 359] write(1, "executing program\n", 18executing program ) = 18 [pid 359] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 25.153675][ T23] audit: type=1400 audit(1740202866.490:66): avc: denied { execmem } for pid=358 comm="syz-executor190" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.188545][ T23] audit: type=1400 audit(1740202866.530:67): avc: denied { read } for pid=359 comm="syz-executor190" name="kvm" dev="devtmpfs" ino=101 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.196341][ T359] 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. [ 25.211439][ T23] audit: type=1400 audit(1740202866.530:68): avc: denied { open } for pid=359 comm="syz-executor190" path="/dev/kvm" dev="devtmpfs" ino=101 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 359] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 359] dup(4) = 5 [pid 359] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 359] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x400000000000}) = 0 [ 25.250465][ T23] audit: type=1400 audit(1740202866.530:69): avc: denied { ioctl } for pid=359 comm="syz-executor190" path="/dev/kvm" dev="devtmpfs" ino=101 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.292218][ T359] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 25.299819][ T359] #PF: supervisor instruction fetch in kernel mode [ 25.306153][ T359] #PF: error_code(0x0010) - not-present page [ 25.311971][ T359] PGD 0 P4D 0 [ 25.315185][ T359] Oops: 0010 [#1] PREEMPT SMP KASAN [ 25.320219][ T359] CPU: 0 PID: 359 Comm: syz-executor190 Not tainted 5.4.289-syzkaller-00011-g39762b7a60e9 #0 [ 25.330196][ T359] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 25.340111][ T359] RIP: 0010:0x86 [ 25.343476][ T359] Code: Bad RIP value. [ 25.347381][ T359] RSP: 0018:ffff8881dd87f308 EFLAGS: 00010086 [ 25.353285][ T359] RAX: ffff8881dd87f338 RBX: dffffc0000000000 RCX: ffff8881df89cec0 [ 25.361100][ T359] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.368912][ T359] RBP: 0000000000000ec0 R08: ffffffff8231cac1 R09: ffffffff811c8f95 [ 25.376718][ T359] R10: ffff8881df89cec0 R11: 0000000000000002 R12: ffffffff84601550 [ 25.384533][ T359] R13: fffffe0000000ec8 R14: ffff8881ee638000 R15: fffffe0000000ecb [ 25.392343][ T359] FS: 0000555568c19380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.401107][ T359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.407532][ T359] CR2: 000000000000005c CR3: 00000001e02de000 CR4: 00000000003426b0 [ 25.415342][ T359] Call Trace: [ 25.418480][ T359] ? __die+0xb4/0x100 [ 25.422293][ T359] ? no_context+0xac7/0xd20 [ 25.426635][ T359] ? is_prefetch+0x4b0/0x4b0 [ 25.431052][ T359] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 25.436431][ T359] ? __do_page_fault+0xa72/0xbb0 [ 25.441211][ T359] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 25.446765][ T359] ? __bad_area_nosemaphore+0xc0/0x470 [ 25.452058][ T359] ? page_fault+0x2f/0x40 [ 25.456224][ T359] ? __entry_text_end+0x4/0x4 [ 25.460735][ T359] ? vmx_handle_exit_irqoff+0x45/0x220 [ 25.466028][ T359] ? check_preemption_disabled+0x91/0x320 [ 25.471589][ T359] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 25.477834][ T359] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 25.484080][ T359] ? __entry_text_end+0x4/0x4 [ 25.488596][ T359] ? vcpu_enter_guest+0x2d06/0x9f70 [ 25.493633][ T359] ? update_rq_clock+0x67/0x350 [ 25.498319][ T359] ? __free_pages_ok+0x847/0x950 [ 25.503089][ T359] ? local_bh_enable+0x20/0x20 [ 25.507691][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.513246][ T359] ? debug_smp_processor_id+0x20/0x20 [ 25.518454][ T359] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 25.523486][ T359] ? read_msr+0x40/0x40 [ 25.527476][ T359] ? rcu_softirq_qs+0x90/0x90 [ 25.531993][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.537545][ T359] ? vmx_vcpu_load+0x3ab/0x450 [ 25.542147][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.547703][ T359] ? debug_smp_processor_id+0x20/0x20 [ 25.552908][ T359] ? kvm_arch_vcpu_load+0x4fe/0x660 [ 25.557954][ T359] ? finish_task_switch+0x51d/0x590 [ 25.562981][ T359] ? __schedule+0xb0d/0x1320 [ 25.567408][ T359] ? is_mmconf_reserved+0x430/0x430 [ 25.572437][ T359] ? read_msr+0x40/0x40 [ 25.576437][ T359] ? update_rq_clock+0x67/0x350 [ 25.581115][ T359] ? preempt_schedule+0xd9/0xe0 [ 25.585801][ T359] ? check_preemption_disabled+0x9f/0x320 [ 25.591377][ T359] ? preempt_schedule+0xd9/0xe0 [ 25.596044][ T359] ? debug_smp_processor_id+0x20/0x20 [ 25.601253][ T359] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 25.606810][ T359] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 25.611497][ T359] ? create_vcpu_fd+0x120/0x120 [ 25.616182][ T359] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 25.621129][ T359] ? _raw_spin_lock_irqsave+0x210/0x210 [ 25.626871][ T359] ? cgroup_update_frozen+0x157/0xab0 [ 25.632063][ T359] ? cgroup_update_frozen+0x157/0xab0 [ 25.637270][ T359] ? cgroup_leave_frozen+0x13c/0x290 [ 25.642393][ T359] ? ptrace_stop+0x6ee/0xa30 [ 25.646819][ T359] ? create_vcpu_fd+0x120/0x120 [ 25.651513][ T359] ? do_vfs_ioctl+0x742/0x1720 [ 25.656103][ T359] ? ioctl_preallocate+0x250/0x250 [ 25.661055][ T359] ? check_preemption_disabled+0x153/0x320 [ 25.666693][ T359] ? syscall_trace_enter+0x650/0x940 [ 25.671817][ T359] ? do_syscall_64+0x1c0/0x1c0 [ 25.676414][ T359] ? switch_fpu_return+0x1d4/0x410 [ 25.681381][ T359] ? security_file_ioctl+0x7d/0xa0 [ 25.686308][ T359] ? __x64_sys_ioctl+0xd4/0x110 [ 25.690993][ T359] ? do_syscall_64+0xca/0x1c0 [ 25.695508][ T359] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 25.701407][ T359] Modules linked in: [ 25.705146][ T359] CR2: 0000000000000086 [ 25.709138][ T359] ---[ end trace ccbb75c30f6c4203 ]--- [ 25.714428][ T359] RIP: 0010:0x86 [ 25.717812][ T359] Code: Bad RIP value. [ 25.721716][ T359] RSP: 0018:ffff8881dd87f308 EFLAGS: 00010086 [ 25.727622][ T359] RAX: ffff8881dd87f338 RBX: dffffc0000000000 RCX: ffff8881df89cec0 [ 25.735432][ T359] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.743242][ T359] RBP: 0000000000000ec0 R08: ffffffff8231cac1 R09: ffffffff811c8f95 [ 25.751052][ T359] R10: ffff8881df89cec0 R11: 0000000000000002 R12: ffffffff84601550 [ 25.758866][ T359] R13: fffffe0000000ec8 R14: ffff8881ee638000 R15: fffffe0000000ecb [ 25.766675][ T359] FS: 0000555568c19380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.775439][ T359] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.781863][ T359] CR2: 000000000000005c CR3: 00000001e02de000 CR4: 00000000003426b0 [ 25.789679][ T359] Kernel panic - not syncing: Fatal exception [ 25.795835][ T359] Kernel Offset: disabled [ 25.799952][ T359] Rebooting in 86400 seconds..