./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3111340936 <...> Warning: Permanently added '10.128.1.37' (ED25519) to the list of known hosts. execve("./syz-executor3111340936", ["./syz-executor3111340936"], 0x7ffef19ec4c0 /* 10 vars */) = 0 brk(NULL) = 0x5555760f2000 brk(0x5555760f2d00) = 0x5555760f2d00 arch_prctl(ARCH_SET_FS, 0x5555760f2380) = 0 set_tid_address(0x5555760f2650) = 362 set_robust_list(0x5555760f2660, 24) = 0 rseq(0x5555760f2ca0, 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-executor3111340936", 4096) = 28 getrandom("\x72\x90\x1f\x25\x25\x98\x93\x6e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555760f2d00 brk(0x555576113d00) = 0x555576113d00 brk(0x555576114000) = 0x555576114000 mprotect(0x7f9d153fc000, 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=0x5555760f2650) = 363 ./strace-static-x86_64: Process 363 attached [pid 363] set_robust_list(0x5555760f2660, 24) = 0 [pid 363] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 363] setpgid(0, 0) = 0 [pid 363] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 363] write(3, "1000", 4) = 4 [pid 363] close(3) = 0 [pid 363] write(1, "executing program\n", 18executing program ) = 18 [pid 363] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 29.441825][ T23] audit: type=1400 audit(1743642434.430:66): avc: denied { execmem } for pid=362 comm="syz-executor311" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 29.454973][ T363] 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 363] ioctl(3, KVM_CREATE_VM, 0) = 4 [ 29.463222][ T23] audit: type=1400 audit(1743642434.440:67): avc: denied { read } for pid=363 comm="syz-executor311" name="kvm" dev="devtmpfs" ino=1131 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 29.501332][ T23] audit: type=1400 audit(1743642434.440:68): avc: denied { open } for pid=363 comm="syz-executor311" path="/dev/kvm" dev="devtmpfs" ino=1131 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 363] ioctl(4, KVM_CREATE_VCPU, 1) = 5 [pid 363] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x200000000000}) = 0 [ 29.525061][ T23] audit: type=1400 audit(1743642434.440:69): avc: denied { ioctl } for pid=363 comm="syz-executor311" path="/dev/kvm" dev="devtmpfs" ino=1131 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 29.565842][ T363] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 29.573544][ T363] #PF: supervisor instruction fetch in kernel mode [ 29.579875][ T363] #PF: error_code(0x0010) - not-present page [ 29.585692][ T363] PGD 0 P4D 0 [ 29.589002][ T363] Oops: 0010 [#1] PREEMPT SMP KASAN [ 29.594028][ T363] CPU: 1 PID: 363 Comm: syz-executor311 Not tainted 5.4.290-syzkaller-00002-g41adfeb3d639 #0 [ 29.604622][ T363] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 29.614534][ T363] RIP: 0010:0x86 [ 29.617986][ T363] Code: Bad RIP value. [ 29.621886][ T363] RSP: 0018:ffff8881f0e7f308 EFLAGS: 00010086 [ 29.627789][ T363] RAX: ffff8881f0e7f338 RBX: dffffc0000000000 RCX: ffff8881f5ff4ec0 [ 29.636032][ T363] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 29.643844][ T363] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 29.651655][ T363] R10: ffff8881f5ff4ec0 R11: 0000000000000002 R12: ffffffff84600228 [ 29.659470][ T363] R13: fffffe0000000278 R14: ffff8881ee470000 R15: fffffe000000027b [ 29.667280][ T363] FS: 00005555760f2380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 29.677761][ T363] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.687463][ T363] CR2: 000000000000005c CR3: 00000001dd581000 CR4: 00000000003426a0 [ 29.698553][ T363] Call Trace: [ 29.702607][ T363] ? __die+0xb4/0x100 [ 29.706720][ T363] ? no_context+0xac7/0xd20 [ 29.712261][ T363] ? is_prefetch+0x4b0/0x4b0 [ 29.719118][ T363] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 29.725300][ T363] ? __do_page_fault+0xa72/0xbb0 [ 29.730249][ T363] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 29.737261][ T363] ? __bad_area_nosemaphore+0xc0/0x470 [ 29.743448][ T363] ? page_fault+0x2f/0x40 [ 29.748675][ T363] ? irq_entries_start+0x38/0x660 [ 29.753883][ T363] ? vmx_handle_exit_irqoff+0x45/0x220 [ 29.759268][ T363] ? check_preemption_disabled+0x91/0x320 [ 29.765586][ T363] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 29.771972][ T363] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 29.778556][ T363] ? irq_entries_start+0x38/0x660 [ 29.783436][ T363] ? vcpu_enter_guest+0x2d06/0x9f70 [ 29.788442][ T363] ? check_preemption_disabled+0x9f/0x320 [ 29.796134][ T363] ? debug_smp_processor_id+0x20/0x20 [ 29.801450][ T363] ? __free_pages_ok+0x847/0x950 [ 29.806293][ T363] ? __kvm_set_memory_region+0xda6/0xf60 [ 29.811856][ T363] ? kvm_vm_ioctl_set_memory_region+0x67/0x90 [ 29.818391][ T363] ? do_vfs_ioctl+0x742/0x1720 [ 29.822958][ T363] ? __x64_sys_ioctl+0xd4/0x110 [ 29.827628][ T363] ? do_syscall_64+0xca/0x1c0 [ 29.832154][ T363] ? local_bh_enable+0x20/0x20 [ 29.836856][ T363] ? __free_one_page+0x7f3/0xa60 [ 29.841734][ T363] ? _raw_spin_unlock+0x49/0x60 [ 29.846412][ T363] ? check_preemption_disabled+0x9f/0x320 [ 29.851958][ T363] ? set_pageblock_migratetype+0x150/0x150 [ 29.857622][ T363] ? debug_smp_processor_id+0x20/0x20 [ 29.863381][ T363] ? kvm_mmu_slot_remove_write_access+0x4d8/0x530 [ 29.869606][ T363] ? llist_add_batch+0x91/0xb0 [ 29.874208][ T363] ? generic_exec_single+0x280/0x3e0 [ 29.879322][ T363] ? smp_call_function_single+0x4a0/0x4a0 [ 29.884982][ T363] ? update_load_avg+0x40f/0x1210 [ 29.889917][ T363] ? smp_call_function_single+0x388/0x4a0 [ 29.895553][ T363] ? loaded_vmcs_clear+0x80/0x80 [ 29.900331][ T363] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 29.907275][ T363] ? check_preemption_disabled+0x9f/0x320 [ 29.912995][ T363] ? loaded_vmcs_clear+0x80/0x80 [ 29.917864][ T363] ? debug_smp_processor_id+0x20/0x20 [ 29.923330][ T363] ? get_cpu_entry_area+0x8/0x30 [ 29.928101][ T363] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 29.933133][ T363] ? read_msr+0x40/0x40 [ 29.937972][ T363] ? check_preemption_disabled+0x9f/0x320 [ 29.944204][ T363] ? debug_smp_processor_id+0x20/0x20 [ 29.952556][ T363] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 29.959615][ T363] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 29.965307][ T363] ? create_vcpu_fd+0x120/0x120 [ 29.970825][ T363] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 29.976354][ T363] ? _raw_spin_lock_irqsave+0x210/0x210 [ 29.982166][ T363] ? cgroup_update_frozen+0x157/0xab0 [ 29.988638][ T363] ? cgroup_update_frozen+0x157/0xab0 [ 29.994462][ T363] ? cgroup_leave_frozen+0x13c/0x290 [ 30.000766][ T363] ? ptrace_stop+0x6ee/0xa30 [ 30.005167][ T363] ? create_vcpu_fd+0x120/0x120 [ 30.010214][ T363] ? do_vfs_ioctl+0x742/0x1720 [ 30.014903][ T363] ? ioctl_preallocate+0x250/0x250 [ 30.021405][ T363] ? check_preemption_disabled+0x153/0x320 [ 30.029623][ T363] ? syscall_trace_enter+0x650/0x940 [ 30.035744][ T363] ? do_syscall_64+0x1c0/0x1c0 [ 30.040486][ T363] ? switch_fpu_return+0x1d4/0x410 [ 30.046769][ T363] ? security_file_ioctl+0x7d/0xa0 [ 30.052867][ T363] ? __x64_sys_ioctl+0xd4/0x110 [ 30.057735][ T363] ? do_syscall_64+0xca/0x1c0 [ 30.064012][ T363] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 30.070069][ T363] Modules linked in: [ 30.073990][ T363] CR2: 0000000000000086 [ 30.078386][ T363] ---[ end trace 5531379998c07fcd ]--- [ 30.083754][ T363] RIP: 0010:0x86 [ 30.088625][ T363] Code: Bad RIP value. [ 30.094998][ T363] RSP: 0018:ffff8881f0e7f308 EFLAGS: 00010086 [ 30.101164][ T363] RAX: ffff8881f0e7f338 RBX: dffffc0000000000 RCX: ffff8881f5ff4ec0 [ 30.109742][ T363] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 30.120280][ T363] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 30.130606][ T363] R10: ffff8881f5ff4ec0 R11: 0000000000000002 R12: ffffffff84600228 [ 30.140351][ T363] R13: fffffe0000000278 R14: ffff8881ee470000 R15: fffffe000000027b [ 30.148648][ T363] FS: 00005555760f2380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 30.160315][ T363] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.167857][ T363] CR2: 000000000000005c CR3: 00000001dd581000 CR4: 00000000003426a0 [ 30.177299][ T363] Kernel panic - not syncing: Fatal exception [ 30.186420][ T363] Kernel Offset: disabled [ 30.193012][ T363] Rebooting in 86400 seconds..