./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor932819171 <...> Warning: Permanently added '10.128.1.162' (ED25519) to the list of known hosts. execve("./syz-executor932819171", ["./syz-executor932819171"], 0x7ffec7fea270 /* 10 vars */) = 0 brk(NULL) = 0x5555893b1000 brk(0x5555893b1d00) = 0x5555893b1d00 arch_prctl(ARCH_SET_FS, 0x5555893b1380) = 0 set_tid_address(0x5555893b1650) = 357 set_robust_list(0x5555893b1660, 24) = 0 rseq(0x5555893b1ca0, 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-executor932819171", 4096) = 27 getrandom("\x61\x78\xf8\xc7\x1b\xdb\x49\x1a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555893b1d00 brk(0x5555893d2d00) = 0x5555893d2d00 brk(0x5555893d3000) = 0x5555893d3000 mprotect(0x7fc4cdaa9000, 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 write(1, "executing program\n", 18executing program ) = 18 openat(AT_FDCWD, "/dev/kvm", O_RDONLY|O_EXCL|O_SYNC) = 3 [ 24.101505][ T23] audit: type=1400 audit(1741095788.010:66): avc: denied { execmem } for pid=357 comm="syz-executor932" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.120949][ T23] audit: type=1400 audit(1741095788.030:67): avc: denied { read } for pid=357 comm="syz-executor932" 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 ioctl(3, KVM_CREATE_VM, 0) = 4 [ 24.121850][ 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. [ 24.144645][ T23] audit: type=1400 audit(1741095788.030:68): avc: denied { open } for pid=357 comm="syz-executor932" 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 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 [ 24.183567][ T23] audit: type=1400 audit(1741095788.030:69): avc: denied { ioctl } for pid=357 comm="syz-executor932" 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 [ 24.215073][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.222709][ T357] #PF: supervisor instruction fetch in kernel mode [ 24.229020][ T357] #PF: error_code(0x0010) - not-present page [ 24.234835][ T357] PGD 0 P4D 0 [ 24.238045][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.243087][ T357] CPU: 1 PID: 357 Comm: syz-executor932 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0 [ 24.253068][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 24.263058][ T357] RIP: 0010:0x86 [ 24.266431][ T357] Code: Bad RIP value. [ 24.270444][ T357] RSP: 0018:ffff8881ef377308 EFLAGS: 00010086 [ 24.276429][ T357] RAX: ffff8881ef377338 RBX: dffffc0000000000 RCX: ffff8881ef3c6e40 [ 24.284240][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.292151][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 24.300279][ T357] R10: ffff8881ef3c6e40 R11: 0000000000000002 R12: ffffffff84600228 [ 24.308040][ T357] R13: fffffe0000000278 R14: ffff8881ee4d8000 R15: fffffe000000027b [ 24.315853][ T357] FS: 00005555893b1380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.324619][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.331042][ T357] CR2: 000000000000005c CR3: 00000001eed67000 CR4: 00000000003426a0 [ 24.339116][ T357] Call Trace: [ 24.342254][ T357] ? __die+0xb4/0x100 [ 24.346060][ T357] ? no_context+0xac7/0xd20 [ 24.350408][ T357] ? is_prefetch+0x4b0/0x4b0 [ 24.354839][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 24.360219][ T357] ? __do_page_fault+0xa72/0xbb0 [ 24.364988][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 24.370540][ T357] ? __bad_area_nosemaphore+0xc0/0x470 [ 24.375832][ T357] ? page_fault+0x2f/0x40 [ 24.379997][ T357] ? irq_entries_start+0x38/0x660 [ 24.384860][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 24.390163][ T357] ? check_preemption_disabled+0x91/0x320 [ 24.395934][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 24.402163][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 24.408411][ T357] ? irq_entries_start+0x38/0x660 [ 24.413271][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 24.418305][ T357] ? find_next_and_bit+0x156/0x190 [ 24.423272][ T357] ? load_balance+0x43e1/0x7a40 [ 24.427953][ T357] ? local_bh_enable+0x20/0x20 [ 24.432556][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.438099][ T357] ? update_blocked_averages+0xd50/0xd50 [ 24.443598][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 24.448595][ T357] ? read_msr+0x40/0x40 [ 24.452679][ T357] ? update_rq_clock+0x67/0x350 [ 24.457378][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.462918][ T357] ? kvm_sched_clock_read+0x14/0x40 [ 24.467952][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.473509][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.478718][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.484276][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.488961][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.493820][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.498782][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.504149][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.509356][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.514562][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 24.519697][ T357] ? ptrace_stop+0x6ee/0xa30 [ 24.524127][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.528806][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 24.533417][ T357] ? ioctl_preallocate+0x250/0x250 [ 24.538375][ T357] ? check_preemption_disabled+0x153/0x320 [ 24.543993][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.549113][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 24.553712][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.558662][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.563607][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.568293][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.572813][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.578707][ T357] Modules linked in: [ 24.582448][ T357] CR2: 0000000000000086 [ 24.586439][ T357] ---[ end trace 34a5229b92ad8620 ]--- [ 24.591729][ T357] RIP: 0010:0x86 [ 24.595132][ T357] Code: Bad RIP value. [ 24.599022][ T357] RSP: 0018:ffff8881ef377308 EFLAGS: 00010086 [ 24.604931][ T357] RAX: ffff8881ef377338 RBX: dffffc0000000000 RCX: ffff8881ef3c6e40 [ 24.612914][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.620831][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 24.628643][ T357] R10: ffff8881ef3c6e40 R11: 0000000000000002 R12: ffffffff84600228 [ 24.636459][ T357] R13: fffffe0000000278 R14: ffff8881ee4d8000 R15: fffffe000000027b [ 24.644812][ T357] FS: 00005555893b1380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.653590][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.660006][ T357] CR2: 000000000000005c CR3: 00000001eed67000 CR4: 00000000003426a0 [ 24.667901][ T357] Kernel panic - not syncing: Fatal exception [ 24.674058][ T357] Kernel Offset: disabled [ 24.678178][ T357] Rebooting in 86400 seconds..