./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3174154879 <...> Warning: Permanently added '10.128.0.22' (ED25519) to the list of known hosts. execve("./syz-executor3174154879", ["./syz-executor3174154879"], 0x7ffcf915d720 /* 10 vars */) = 0 brk(NULL) = 0x55555571b000 brk(0x55555571bd00) = 0x55555571bd00 arch_prctl(ARCH_SET_FS, 0x55555571b380) = 0 set_tid_address(0x55555571b650) = 356 set_robust_list(0x55555571b660, 24) = 0 rseq(0x55555571bca0, 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-executor3174154879", 4096) = 28 getrandom("\x7d\x04\x8b\x65\xfd\x32\x26\x9f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555571bd00 brk(0x55555573cd00) = 0x55555573cd00 brk(0x55555573d000) = 0x55555573d000 mprotect(0x7f50bde67000, 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=0x55555571b650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x55555571b660, 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] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 22.519839][ T23] audit: type=1400 audit(1713213131.310:66): avc: denied { execmem } for pid=356 comm="syz-executor317" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.543961][ T23] audit: type=1400 audit(1713213131.330:67): avc: denied { read } for pid=357 comm="syz-executor317" name="kvm" dev="devtmpfs" ino=112 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.558296][ 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. [ 22.566910][ T23] audit: type=1400 audit(1713213131.330:68): avc: denied { open } for pid=357 comm="syz-executor317" path="/dev/kvm" dev="devtmpfs" ino=112 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_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [pid 357] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 22.605627][ T23] audit: type=1400 audit(1713213131.350:69): avc: denied { ioctl } for pid=357 comm="syz-executor317" path="/dev/kvm" dev="devtmpfs" ino=112 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.648709][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 22.656394][ T357] #PF: supervisor instruction fetch in kernel mode [ 22.662733][ T357] #PF: error_code(0x0010) - not-present page [ 22.668542][ T357] PGD 1dbf6a067 P4D 1dbf6a067 PUD 1dbf6b067 PMD 0 [ 22.674879][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 22.679921][ T357] CPU: 0 PID: 357 Comm: syz-executor317 Not tainted 5.4.268-syzkaller-00001-g002e7f61a061 #0 [ 22.689894][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 22.699807][ T357] RIP: 0010:0x86 [ 22.703177][ T357] Code: Bad RIP value. [ 22.707078][ T357] RSP: 0018:ffff8881dbf67308 EFLAGS: 00010086 [ 22.713008][ T357] RAX: ffff8881dbf67338 RBX: dffffc0000000000 RCX: ffff8881e26c0fc0 [ 22.720797][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.728607][ T357] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.736417][ T357] R10: ffff8881e26c0fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 22.744320][ T357] R13: fffffe0000000fd8 R14: ffff8881db878000 R15: fffffe0000000fdb [ 22.752130][ T357] FS: 000055555571b380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 22.760895][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.767314][ T357] CR2: 000000000000005c CR3: 00000001dbd02000 CR4: 00000000003426b0 [ 22.775128][ T357] Call Trace: [ 22.778265][ T357] ? __die+0xb4/0x100 [ 22.782075][ T357] ? no_context+0xbda/0xe50 [ 22.786412][ T357] ? is_prefetch+0x4b0/0x4b0 [ 22.790838][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 22.796221][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 22.800997][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 22.806551][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 22.811846][ T357] ? page_fault+0x2f/0x40 [ 22.816013][ T357] ? call_function_interrupt+0x20/0x20 [ 22.821314][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 22.826599][ T357] ? check_preemption_disabled+0x91/0x320 [ 22.832163][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 22.838406][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 22.844659][ T357] ? call_function_interrupt+0x20/0x20 [ 22.849948][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 22.854985][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.860536][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 22.865830][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.871388][ T357] ? _raw_spin_lock+0x1b0/0x1b0 [ 22.876073][ T357] ? debug_smp_processor_id+0x20/0x20 [ 22.881280][ T357] ? local_bh_enable+0x20/0x20 [ 22.885882][ T357] ? internal_add_timer+0x34b/0x430 [ 22.890917][ T357] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 22.896558][ T357] ? __mod_timer+0x72b/0x13e0 [ 22.901245][ T357] ? mod_timer_pending+0x20/0x20 [ 22.906016][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 22.911322][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.916867][ T357] ? __fd_install+0x119/0x230 [ 22.921381][ T357] ? update_load_avg+0x40f/0x1210 [ 22.926238][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.931799][ T357] ? debug_smp_processor_id+0x20/0x20 [ 22.937005][ T357] ? resched_curr+0x9b/0x200 [ 22.941430][ T357] ? check_preempt_wakeup+0x4f6/0x9f0 [ 22.946640][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 22.951670][ T357] ? try_to_wake_up+0x7c5/0x14f0 [ 22.956443][ T357] ? read_msr+0x40/0x40 [ 22.960532][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.966085][ T357] ? check_preemption_disabled+0x9f/0x320 [ 22.971729][ T357] ? debug_smp_processor_id+0x20/0x20 [ 22.976936][ T357] ? kvm_check_async_pf_completion+0x335/0x350 [ 22.982925][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 22.988481][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 22.993165][ T357] ? create_vcpu_fd+0x120/0x120 [ 22.997850][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.002803][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.008181][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.013389][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.018598][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 23.023979][ T357] ? ptrace_stop+0x6ee/0xa30 [ 23.028413][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.033089][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 23.037691][ T357] ? ioctl_preallocate+0x250/0x250 [ 23.042637][ T357] ? check_preemption_disabled+0x153/0x320 [ 23.048280][ T357] ? syscall_trace_enter+0x650/0x940 [ 23.053400][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 23.058002][ T357] ? switch_fpu_return+0x1d4/0x410 [ 23.062947][ T357] ? security_file_ioctl+0x7d/0xa0 [ 23.067893][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 23.072585][ T357] ? do_syscall_64+0xca/0x1c0 [ 23.077095][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.082994][ T357] Modules linked in: [ 23.086737][ T357] CR2: 0000000000000086 [ 23.090740][ T357] ---[ end trace 0b94a010913a5e2d ]--- [ 23.096026][ T357] RIP: 0010:0x86 [ 23.099406][ T357] Code: Bad RIP value. [ 23.103304][ T357] RSP: 0018:ffff8881dbf67308 EFLAGS: 00010086 [ 23.109211][ T357] RAX: ffff8881dbf67338 RBX: dffffc0000000000 RCX: ffff8881e26c0fc0 [ 23.117026][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.124833][ T357] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.132650][ T357] R10: ffff8881e26c0fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 23.140453][ T357] R13: fffffe0000000fd8 R14: ffff8881db878000 R15: fffffe0000000fdb [ 23.148267][ T357] FS: 000055555571b380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.157030][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.163452][ T357] CR2: 000000000000005c CR3: 00000001dbd02000 CR4: 00000000003426b0 [ 23.171269][ T357] Kernel panic - not syncing: Fatal exception [ 23.177349][ T357] Kernel Offset: disabled [ 23.181466][ T357] Rebooting in 86400 seconds..