./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1960650885 <...> Warning: Permanently added '10.128.0.21' (ED25519) to the list of known hosts. execve("./syz-executor1960650885", ["./syz-executor1960650885"], 0x7ffd97df9820 /* 10 vars */) = 0 brk(NULL) = 0x555556fc1000 brk(0x555556fc1d00) = 0x555556fc1d00 arch_prctl(ARCH_SET_FS, 0x555556fc1380) = 0 set_tid_address(0x555556fc1650) = 357 set_robust_list(0x555556fc1660, 24) = 0 rseq(0x555556fc1ca0, 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-executor1960650885", 4096) = 28 getrandom("\xb1\xf0\xdc\xe4\xfe\xdd\x2f\xa4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556fc1d00 brk(0x555556fe2d00) = 0x555556fe2d00 brk(0x555556fe3000) = 0x555556fe3000 mprotect(0x7f9c72a33000, 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=0x555556fc1650) = 358 ./strace-static-x86_64: Process 358 attached [pid 358] set_robust_list(0x555556fc1660, 24) = 0 [pid 358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 358] setpgid(0, 0) = 0 [pid 358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 358] write(3, "1000", 4) = 4 [pid 358] close(3) = 0 [pid 358] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 23.366485][ T23] audit: type=1400 audit(1714445812.139:66): avc: denied { execmem } for pid=357 comm="syz-executor196" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.382261][ T358] 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. [pid 358] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 358] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [pid 358] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 23.386337][ T23] audit: type=1400 audit(1714445812.159:67): avc: denied { read } for pid=358 comm="syz-executor196" 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 [ 23.424447][ T23] audit: type=1400 audit(1714445812.159:68): avc: denied { open } for pid=358 comm="syz-executor196" 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 [ 23.449877][ T23] audit: type=1400 audit(1714445812.159:69): avc: denied { ioctl } for pid=358 comm="syz-executor196" 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 [ 23.456624][ T358] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.482044][ T358] #PF: supervisor instruction fetch in kernel mode [ 23.488375][ T358] #PF: error_code(0x0010) - not-present page [ 23.494189][ T358] PGD 1dd9d8067 P4D 1dd9d8067 PUD 1e2744067 PMD 0 [ 23.500527][ T358] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.505563][ T358] CPU: 0 PID: 358 Comm: syz-executor196 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 23.515540][ T358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.525616][ T358] RIP: 0010:0x86 [ 23.528982][ T358] Code: Bad RIP value. [ 23.532885][ T358] RSP: 0018:ffff8881dc057308 EFLAGS: 00010086 [ 23.538787][ T358] RAX: ffff8881dc057338 RBX: dffffc0000000000 RCX: ffff8881e0c50000 [ 23.546600][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.554411][ T358] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.562222][ T358] R10: ffff8881e0c50000 R11: 0000000000000002 R12: ffffffff84600238 [ 23.570035][ T358] R13: fffffe0000000298 R14: ffff8881dc060000 R15: fffffe000000029b [ 23.577847][ T358] FS: 0000555556fc1380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.586608][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.593034][ T358] CR2: 000000000000005c CR3: 00000001dd0bf000 CR4: 00000000003426b0 [ 23.600847][ T358] Call Trace: [ 23.603976][ T358] ? __die+0xb4/0x100 [ 23.607790][ T358] ? no_context+0xbda/0xe50 [ 23.612127][ T358] ? is_prefetch+0x4b0/0x4b0 [ 23.616551][ T358] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.621936][ T358] ? __do_page_fault+0xa7d/0xbb0 [ 23.626710][ T358] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.632264][ T358] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.637562][ T358] ? page_fault+0x2f/0x40 [ 23.641724][ T358] ? irq_entries_start+0x48/0x660 [ 23.646584][ T358] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.651878][ T358] ? check_preemption_disabled+0x91/0x320 [ 23.657434][ T358] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.663685][ T358] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.669932][ T358] ? irq_entries_start+0x48/0x660 [ 23.674790][ T358] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.679827][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.685381][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.690787][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.696330][ T358] ? _raw_spin_lock+0x1b0/0x1b0 [ 23.701026][ T358] ? debug_smp_processor_id+0x20/0x20 [ 23.706223][ T358] ? local_bh_enable+0x20/0x20 [ 23.710826][ T358] ? internal_add_timer+0x34b/0x430 [ 23.715857][ T358] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 23.721498][ T358] ? __mod_timer+0x72b/0x13e0 [ 23.726010][ T358] ? mod_timer_pending+0x20/0x20 [ 23.730785][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.736080][ T358] ? read_msr+0x40/0x40 [ 23.740075][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.745629][ T358] ? __fd_install+0x119/0x230 [ 23.750143][ T358] ? update_load_avg+0x40f/0x1210 [ 23.754999][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.760555][ T358] ? debug_smp_processor_id+0x20/0x20 [ 23.765763][ T358] ? resched_curr+0x9b/0x200 [ 23.770199][ T358] ? check_preempt_wakeup+0x4f6/0x9f0 [ 23.775397][ T358] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.780431][ T358] ? try_to_wake_up+0x7c5/0x14f0 [ 23.785202][ T358] ? read_msr+0x40/0x40 [ 23.789198][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.794749][ T358] ? check_preemption_disabled+0x9f/0x320 [ 23.800305][ T358] ? debug_smp_processor_id+0x20/0x20 [ 23.805513][ T358] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.811070][ T358] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.815753][ T358] ? create_vcpu_fd+0x120/0x120 [ 23.820445][ T358] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.825385][ T358] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.830770][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 23.835975][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 23.841187][ T358] ? cgroup_leave_frozen+0x13c/0x290 [ 23.846306][ T358] ? ptrace_stop+0x6ee/0xa30 [ 23.850731][ T358] ? create_vcpu_fd+0x120/0x120 [ 23.855421][ T358] ? do_vfs_ioctl+0x742/0x1720 [ 23.860021][ T358] ? ioctl_preallocate+0x250/0x250 [ 23.864966][ T358] ? check_preemption_disabled+0x153/0x320 [ 23.870606][ T358] ? syscall_trace_enter+0x650/0x940 [ 23.875726][ T358] ? do_syscall_64+0x1c0/0x1c0 [ 23.880326][ T358] ? switch_fpu_return+0x1d4/0x410 [ 23.885273][ T358] ? security_file_ioctl+0x7d/0xa0 [ 23.890223][ T358] ? __x64_sys_ioctl+0xd4/0x110 [ 23.894906][ T358] ? do_syscall_64+0xca/0x1c0 [ 23.899419][ T358] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.905319][ T358] Modules linked in: [ 23.909064][ T358] CR2: 0000000000000086 [ 23.913053][ T358] ---[ end trace ef1f87e245d9ae7c ]--- [ 23.918346][ T358] RIP: 0010:0x86 [ 23.921727][ T358] Code: Bad RIP value. [ 23.925628][ T358] RSP: 0018:ffff8881dc057308 EFLAGS: 00010086 [ 23.931530][ T358] RAX: ffff8881dc057338 RBX: dffffc0000000000 RCX: ffff8881e0c50000 [ 23.939341][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.947153][ T358] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.954966][ T358] R10: ffff8881e0c50000 R11: 0000000000000002 R12: ffffffff84600238 [ 23.962776][ T358] R13: fffffe0000000298 R14: ffff8881dc060000 R15: fffffe000000029b [ 23.970588][ T358] FS: 0000555556fc1380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.979353][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.985775][ T358] CR2: 000000000000005c CR3: 00000001dd0bf000 CR4: 00000000003426b0 [ 23.993695][ T358] Kernel panic - not syncing: Fatal exception [ 23.999787][ T358] Kernel Offset: disabled [ 24.003909][ T358] Rebooting in 86400 seconds..