./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor13412205 <...> Warning: Permanently added '10.128.0.150' (ED25519) to the list of known hosts. execve("./syz-executor13412205", ["./syz-executor13412205"], 0x7fff65507a30 /* 10 vars */) = 0 brk(NULL) = 0x555570652000 brk(0x555570652e00) = 0x555570652e00 arch_prctl(ARCH_SET_FS, 0x555570652480) = 0 set_tid_address(0x555570652750) = 358 set_robust_list(0x555570652760, 24) = 0 rseq(0x555570652da0, 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-executor13412205", 4096) = 26 getrandom("\xd9\xaa\xc4\xcf\xc4\xc7\x9b\xe3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555570652e00 brk(0x555570673e00) = 0x555570673e00 brk(0x555570674000) = 0x555570674000 mprotect(0x7fefe56e6000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fefe5643a40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fefe564ac00}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fefe5643a40, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fefe564ac00}, NULL, 8) = 0 write(1, "executing program\n", 18executing program ) = 18 openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 24.784083][ T23] audit: type=1400 audit(1740683647.690:66): avc: denied { execmem } for pid=358 comm="syz-executor134" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.803301][ 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. ioctl(3, KVM_CREATE_VM, 0) = 4 ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_LOG_DIRTY_PAGES, guest_phys_addr=0, memory_size=8192, userspace_addr=0x4000000aa000}) = 0 ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 24.804047][ T23] audit: type=1400 audit(1740683647.710:67): avc: denied { read } for pid=358 comm="syz-executor134" name="kvm" dev="devtmpfs" ino=107 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.842728][ T23] audit: type=1400 audit(1740683647.710:68): avc: denied { open } for pid=358 comm="syz-executor134" path="/dev/kvm" dev="devtmpfs" ino=107 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.870860][ T23] audit: type=1400 audit(1740683647.710:69): avc: denied { ioctl } for pid=358 comm="syz-executor134" path="/dev/kvm" dev="devtmpfs" ino=107 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.874525][ T358] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.903061][ T358] #PF: supervisor instruction fetch in kernel mode [ 24.909399][ T358] #PF: error_code(0x0010) - not-present page [ 24.915202][ T358] PGD 0 P4D 0 [ 24.918415][ T358] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.923454][ T358] CPU: 0 PID: 358 Comm: syz-executor134 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0 [ 24.933542][ T358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 24.943441][ T358] RIP: 0010:0x86 [ 24.946826][ T358] Code: Bad RIP value. [ 24.950731][ T358] RSP: 0018:ffff8881d90af308 EFLAGS: 00010086 [ 24.956631][ T358] RAX: ffff8881d90af338 RBX: dffffc0000000000 RCX: ffff8881f30e2f40 [ 24.964459][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.972356][ T358] RBP: 0000000000000260 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 24.980153][ T358] R10: ffff8881f30e2f40 R11: 0000000000000002 R12: ffffffff84600220 [ 24.987984][ T358] R13: fffffe0000000268 R14: ffff8881ee408000 R15: fffffe000000026b [ 24.995867][ T358] FS: 0000555570652480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.004631][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.011055][ T358] CR2: 000000000000005c CR3: 00000001ef0ee000 CR4: 00000000003426b0 [ 25.018902][ T358] Call Trace: [ 25.022009][ T358] ? __die+0xb4/0x100 [ 25.025817][ T358] ? no_context+0xac7/0xd20 [ 25.030168][ T358] ? is_prefetch+0x4b0/0x4b0 [ 25.034593][ T358] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 25.039967][ T358] ? __do_page_fault+0xa72/0xbb0 [ 25.044736][ T358] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 25.050301][ T358] ? __bad_area_nosemaphore+0xc0/0x470 [ 25.055600][ T358] ? page_fault+0x2f/0x40 [ 25.059761][ T358] ? irq_entries_start+0x30/0x660 [ 25.064614][ T358] ? vmx_handle_exit_irqoff+0x45/0x220 [ 25.069907][ T358] ? check_preemption_disabled+0x91/0x320 [ 25.075634][ T358] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 25.082246][ T358] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 25.088560][ T358] ? irq_entries_start+0x30/0x660 [ 25.093415][ T358] ? vcpu_enter_guest+0x2d06/0x9f70 [ 25.098450][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.104005][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.109299][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.114855][ T358] ? _raw_spin_lock+0x1b0/0x1b0 [ 25.119537][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.124750][ T358] ? local_bh_enable+0x20/0x20 [ 25.129350][ T358] ? internal_add_timer+0x34b/0x430 [ 25.134386][ T358] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 25.140025][ T358] ? __mod_timer+0x72b/0x13e0 [ 25.144540][ T358] ? mod_timer_pending+0x20/0x20 [ 25.149312][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 25.154613][ T358] ? read_msr+0x40/0x40 [ 25.158598][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.164157][ T358] ? __fd_install+0x119/0x230 [ 25.168669][ T358] ? update_load_avg+0x40f/0x1210 [ 25.173531][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.179086][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.184294][ T358] ? resched_curr+0x9b/0x200 [ 25.188717][ T358] ? check_preempt_wakeup+0x4f6/0x9f0 [ 25.193927][ T358] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 25.199089][ T358] ? try_to_wake_up+0x7c5/0x14f0 [ 25.203844][ T358] ? read_msr+0x40/0x40 [ 25.207828][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.213381][ T358] ? check_preemption_disabled+0x9f/0x320 [ 25.218945][ T358] ? debug_smp_processor_id+0x20/0x20 [ 25.224144][ T358] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 25.229789][ T358] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 25.234469][ T358] ? create_vcpu_fd+0x120/0x120 [ 25.239161][ T358] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 25.244106][ T358] ? _raw_spin_lock_irqsave+0x210/0x210 [ 25.249487][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 25.254699][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 25.259948][ T358] ? cgroup_leave_frozen+0x13c/0x290 [ 25.265031][ T358] ? ptrace_stop+0x6ee/0xa30 [ 25.269454][ T358] ? create_vcpu_fd+0x120/0x120 [ 25.274142][ T358] ? do_vfs_ioctl+0x742/0x1720 [ 25.278760][ T358] ? ioctl_preallocate+0x250/0x250 [ 25.283700][ T358] ? check_preemption_disabled+0x153/0x320 [ 25.289330][ T358] ? syscall_trace_enter+0x650/0x940 [ 25.294453][ T358] ? do_syscall_64+0x1c0/0x1c0 [ 25.299055][ T358] ? switch_fpu_return+0x1d4/0x410 [ 25.304003][ T358] ? security_file_ioctl+0x7d/0xa0 [ 25.308961][ T358] ? __x64_sys_ioctl+0xd4/0x110 [ 25.313634][ T358] ? do_syscall_64+0xca/0x1c0 [ 25.318329][ T358] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 25.324191][ T358] Modules linked in: [ 25.327981][ T358] CR2: 0000000000000086 [ 25.331973][ T358] ---[ end trace 1dc1207ffc82fac1 ]--- [ 25.337281][ T358] RIP: 0010:0x86 [ 25.340652][ T358] Code: Bad RIP value. [ 25.344556][ T358] RSP: 0018:ffff8881d90af308 EFLAGS: 00010086 [ 25.350457][ T358] RAX: ffff8881d90af338 RBX: dffffc0000000000 RCX: ffff8881f30e2f40 [ 25.358267][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.366095][ T358] RBP: 0000000000000260 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 25.373894][ T358] R10: ffff8881f30e2f40 R11: 0000000000000002 R12: ffffffff84600220 [ 25.381706][ T358] R13: fffffe0000000268 R14: ffff8881ee408000 R15: fffffe000000026b [ 25.389624][ T358] FS: 0000555570652480(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.398394][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.404825][ T358] CR2: 000000000000005c CR3: 00000001ef0ee000 CR4: 00000000003426b0 [ 25.412719][ T358] Kernel panic - not syncing: Fatal exception [ 25.418854][ T358] Kernel Offset: disabled [ 25.422980][ T358] Rebooting in 86400 seconds..