./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2839407340 <...> Warning: Permanently added '10.128.0.175' (ED25519) to the list of known hosts. execve("./syz-executor2839407340", ["./syz-executor2839407340"], 0x7ffd4a1e24f0 /* 10 vars */) = 0 brk(NULL) = 0x55555bf8a000 brk(0x55555bf8ad00) = 0x55555bf8ad00 arch_prctl(ARCH_SET_FS, 0x55555bf8a380) = 0 set_tid_address(0x55555bf8a650) = 357 set_robust_list(0x55555bf8a660, 24) = 0 rseq(0x55555bf8aca0, 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-executor2839407340", 4096) = 28 getrandom("\x9c\x75\x58\x8f\x9e\xbc\x1f\xe1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555bf8ad00 brk(0x55555bfabd00) = 0x55555bfabd00 brk(0x55555bfac000) = 0x55555bfac000 mprotect(0x7f486a308000, 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) = 3 [ 23.574709][ T23] audit: type=1400 audit(1740407353.999:66): avc: denied { execmem } for pid=357 comm="syz-executor283" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.589390][ 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. ioctl(3, KVM_CREATE_VM, 0) = 4 ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x400000000000}) = 0 ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 23.593914][ T23] audit: type=1400 audit(1740407354.019:67): avc: denied { read } for pid=357 comm="syz-executor283" name="kvm" dev="devtmpfs" ino=115 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.632674][ T23] audit: type=1400 audit(1740407354.019:68): avc: denied { open } for pid=357 comm="syz-executor283" path="/dev/kvm" dev="devtmpfs" ino=115 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.664830][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.672428][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.678762][ T357] #PF: error_code(0x0010) - not-present page [ 23.684586][ T357] PGD 0 P4D 0 [ 23.687794][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.692826][ T357] CPU: 1 PID: 357 Comm: syz-executor283 Not tainted 5.4.290-syzkaller-00017-g6b07fcd94a6a #0 [ 23.696650][ T23] audit: type=1400 audit(1740407354.019:69): avc: denied { ioctl } for pid=357 comm="syz-executor283" path="/dev/kvm" dev="devtmpfs" ino=115 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.702813][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 23.737288][ T357] RIP: 0010:0x86 [ 23.740648][ T357] Code: Bad RIP value. [ 23.744551][ T357] RSP: 0018:ffff8881eeb77308 EFLAGS: 00010086 [ 23.750458][ T357] RAX: ffff8881eeb77338 RBX: dffffc0000000000 RCX: ffff8881eed98fc0 [ 23.758269][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.766075][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 23.773888][ T357] R10: ffff8881eed98fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 23.781699][ T357] R13: fffffe0000000278 R14: ffff8881ef398000 R15: fffffe000000027b [ 23.789510][ T357] FS: 000055555bf8a380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.798284][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.804703][ T357] CR2: 000000000000005c CR3: 00000001ef6d5000 CR4: 00000000003426a0 [ 23.812512][ T357] Call Trace: [ 23.815650][ T357] ? __die+0xb4/0x100 [ 23.819458][ T357] ? no_context+0xac7/0xd20 [ 23.823795][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.828220][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.833601][ T357] ? __do_page_fault+0xa72/0xbb0 [ 23.838382][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.843935][ T357] ? __bad_area_nosemaphore+0xc0/0x470 [ 23.849227][ T357] ? page_fault+0x2f/0x40 [ 23.853390][ T357] ? irq_entries_start+0x38/0x660 [ 23.858254][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.863544][ T357] ? check_preemption_disabled+0x91/0x320 [ 23.869101][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.875348][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.881597][ T357] ? irq_entries_start+0x38/0x660 [ 23.886458][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.891491][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.897049][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.902349][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.907894][ T357] ? _raw_spin_lock+0x1b0/0x1b0 [ 23.912579][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.917788][ T357] ? local_bh_enable+0x20/0x20 [ 23.922388][ T357] ? internal_add_timer+0x34b/0x430 [ 23.927425][ T357] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 23.933064][ T357] ? __mod_timer+0x72b/0x13e0 [ 23.937578][ T357] ? mod_timer_pending+0x20/0x20 [ 23.942357][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.947646][ T357] ? read_msr+0x40/0x40 [ 23.951637][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.957196][ T357] ? __fd_install+0x119/0x230 [ 23.961706][ T357] ? update_load_avg+0x40f/0x1210 [ 23.966567][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.972118][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.977328][ T357] ? resched_curr+0x9b/0x200 [ 23.981754][ T357] ? check_preempt_wakeup+0x4f6/0x9f0 [ 23.986965][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.991995][ T357] ? try_to_wake_up+0x7c5/0x14f0 [ 23.996777][ T357] ? read_msr+0x40/0x40 [ 24.000762][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.006319][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.011868][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.017081][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.022635][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.027319][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.032004][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.036953][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.042333][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.047542][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.052750][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 24.057872][ T357] ? ptrace_stop+0x6ee/0xa30 [ 24.062296][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.066982][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 24.071584][ T357] ? ioctl_preallocate+0x250/0x250 [ 24.076537][ T357] ? check_preemption_disabled+0x153/0x320 [ 24.082173][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.087297][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 24.091894][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.096841][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.101788][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.106473][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.110988][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.116885][ T357] Modules linked in: [ 24.120629][ T357] CR2: 0000000000000086 [ 24.124618][ T357] ---[ end trace 718cf3006ba5bbb1 ]--- [ 24.129909][ T357] RIP: 0010:0x86 [ 24.133293][ T357] Code: Bad RIP value. [ 24.137195][ T357] RSP: 0018:ffff8881eeb77308 EFLAGS: 00010086 [ 24.143098][ T357] RAX: ffff8881eeb77338 RBX: dffffc0000000000 RCX: ffff8881eed98fc0 [ 24.150906][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.158720][ T357] RBP: 0000000000000270 R08: ffffffff8231cd01 R09: ffffffff811c8f95 [ 24.166533][ T357] R10: ffff8881eed98fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 24.174342][ T357] R13: fffffe0000000278 R14: ffff8881ef398000 R15: fffffe000000027b [ 24.182156][ T357] FS: 000055555bf8a380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.190919][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.197367][ T357] CR2: 000000000000005c CR3: 00000001ef6d5000 CR4: 00000000003426a0 [ 24.205155][ T357] Kernel panic - not syncing: Fatal exception [ 24.211248][ T357] Kernel Offset: disabled [ 24.215365][ T357] Rebooting in 86400 seconds..