./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1942857621 <...> Warning: Permanently added '10.128.1.52' (ED25519) to the list of known hosts. execve("./syz-executor1942857621", ["./syz-executor1942857621"], 0x7ffd33748aa0 /* 10 vars */) = 0 brk(NULL) = 0x5555555ab000 brk(0x5555555abd00) = 0x5555555abd00 arch_prctl(ARCH_SET_FS, 0x5555555ab380) = 0 set_tid_address(0x5555555ab650) = 353 set_robust_list(0x5555555ab660, 24) = 0 rseq(0x5555555abca0, 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-executor1942857621", 4096) = 28 getrandom("\xe4\x02\x54\xf5\x17\xe3\xea\xca", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555555abd00 brk(0x5555555ccd00) = 0x5555555ccd00 brk(0x5555555cd000) = 0x5555555cd000 mprotect(0x7fc394e54000, 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=0x5555555ab650) = 354 ./strace-static-x86_64: Process 354 attached [pid 354] set_robust_list(0x5555555ab660, 24) = 0 [pid 354] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 354] setpgid(0, 0) = 0 [pid 354] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 354] write(3, "1000", 4) = 4 [pid 354] close(3) = 0 [pid 354] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 21.339262][ T23] audit: type=1400 audit(1713322909.139:66): avc: denied { execmem } for pid=353 comm="syz-executor194" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.363075][ T23] audit: type=1400 audit(1713322909.159:67): avc: denied { read } for pid=354 comm="syz-executor194" name="kvm" dev="devtmpfs" ino=9123 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 21.368023][ T354] 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. [ 21.386557][ T23] audit: type=1400 audit(1713322909.159:68): avc: denied { open } for pid=354 comm="syz-executor194" path="/dev/kvm" dev="devtmpfs" ino=9123 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 354] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 354] ioctl(4, KVM_CREATE_IRQCHIP, 0) = 0 [pid 354] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 21.424948][ T23] audit: type=1400 audit(1713322909.169:69): avc: denied { ioctl } for pid=354 comm="syz-executor194" path="/dev/kvm" dev="devtmpfs" ino=9123 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 21.470713][ T354] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 21.478314][ T354] #PF: supervisor instruction fetch in kernel mode [ 21.484646][ T354] #PF: error_code(0x0010) - not-present page [ 21.490461][ T354] PGD 1dc79d067 P4D 1dc79d067 PUD 1dc61e067 PMD 0 [ 21.496886][ T354] Oops: 0010 [#1] PREEMPT SMP KASAN [ 21.501930][ T354] CPU: 1 PID: 354 Comm: syz-executor194 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 21.511913][ T354] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 21.521815][ T354] RIP: 0010:0x86 [ 21.525183][ T354] Code: Bad RIP value. [ 21.529083][ T354] RSP: 0018:ffff8881dc15f308 EFLAGS: 00010086 [ 21.535100][ T354] RAX: ffff8881dc15f338 RBX: dffffc0000000000 RCX: ffff8881dc155e80 [ 21.542907][ T354] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.550727][ T354] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 21.558531][ T354] R10: ffff8881dc155e80 R11: 0000000000000002 R12: ffffffff84600228 [ 21.566342][ T354] R13: fffffe0000000278 R14: ffff8881dc248000 R15: fffffe000000027b [ 21.574153][ T354] FS: 00005555555ab380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.582926][ T354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.589341][ T354] CR2: 000000000000005c CR3: 00000001dc4ec000 CR4: 00000000003426a0 [ 21.597154][ T354] Call Trace: [ 21.600287][ T354] ? __die+0xb4/0x100 [ 21.604106][ T354] ? no_context+0xbda/0xe50 [ 21.608472][ T354] ? is_prefetch+0x4b0/0x4b0 [ 21.612868][ T354] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 21.618245][ T354] ? __do_page_fault+0xa7d/0xbb0 [ 21.623021][ T354] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 21.628575][ T354] ? __bad_area_nosemaphore+0xc0/0x460 [ 21.633872][ T354] ? page_fault+0x2f/0x40 [ 21.638037][ T354] ? irq_entries_start+0x38/0x660 [ 21.642896][ T354] ? vmx_handle_exit_irqoff+0x45/0x220 [ 21.648189][ T354] ? check_preemption_disabled+0x91/0x320 [ 21.653745][ T354] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 21.659993][ T354] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 21.666249][ T354] ? irq_entries_start+0x38/0x660 [ 21.671101][ T354] ? vcpu_enter_guest+0x2d06/0x9f70 [ 21.676140][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.681700][ T354] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 21.687247][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.692833][ T354] ? _raw_spin_lock+0x1b0/0x1b0 [ 21.697575][ T354] ? debug_smp_processor_id+0x20/0x20 [ 21.702787][ T354] ? local_bh_enable+0x20/0x20 [ 21.707383][ T354] ? internal_add_timer+0x34b/0x430 [ 21.712416][ T354] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 21.718056][ T354] ? __mod_timer+0x72b/0x13e0 [ 21.722569][ T354] ? mod_timer_pending+0x20/0x20 [ 21.727343][ T354] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 21.732639][ T354] ? read_msr+0x40/0x40 [ 21.736631][ T354] ? kvm_arch_vcpu_put+0x352/0x580 [ 21.741577][ T354] ? __fd_install+0x119/0x230 [ 21.746101][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.751651][ T354] ? update_load_avg+0x40f/0x1210 [ 21.756507][ T354] ? sched_clock_cpu+0x18/0x3a0 [ 21.761193][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.766754][ T354] ? debug_smp_processor_id+0x20/0x20 [ 21.771959][ T354] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 21.776993][ T354] ? try_to_wake_up+0x7c5/0x14f0 [ 21.781768][ T354] ? read_msr+0x40/0x40 [ 21.785765][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.791311][ T354] ? check_preemption_disabled+0x9f/0x320 [ 21.796869][ T354] ? debug_smp_processor_id+0x20/0x20 [ 21.802077][ T354] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 21.807628][ T354] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 21.812319][ T354] ? create_vcpu_fd+0x120/0x120 [ 21.817003][ T354] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 21.821947][ T354] ? _raw_spin_lock_irqsave+0x210/0x210 [ 21.827331][ T354] ? cgroup_update_frozen+0x157/0xab0 [ 21.832537][ T354] ? cgroup_update_frozen+0x157/0xab0 [ 21.837753][ T354] ? cgroup_leave_frozen+0x13c/0x290 [ 21.842866][ T354] ? ptrace_stop+0x6ee/0xa30 [ 21.847300][ T354] ? create_vcpu_fd+0x120/0x120 [ 21.851986][ T354] ? do_vfs_ioctl+0x742/0x1720 [ 21.856586][ T354] ? ioctl_preallocate+0x250/0x250 [ 21.861525][ T354] ? check_preemption_disabled+0x153/0x320 [ 21.867183][ T354] ? syscall_trace_enter+0x650/0x940 [ 21.872289][ T354] ? do_syscall_64+0x1c0/0x1c0 [ 21.876900][ T354] ? switch_fpu_return+0x1d4/0x410 [ 21.881859][ T354] ? security_file_ioctl+0x7d/0xa0 [ 21.886791][ T354] ? __x64_sys_ioctl+0xd4/0x110 [ 21.891476][ T354] ? do_syscall_64+0xca/0x1c0 [ 21.895982][ T354] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 21.901885][ T354] Modules linked in: [ 21.905624][ T354] CR2: 0000000000000086 [ 21.909612][ T354] ---[ end trace 36d0cd676ab865b9 ]--- [ 21.914907][ T354] RIP: 0010:0x86 [ 21.918288][ T354] Code: Bad RIP value. [ 21.922190][ T354] RSP: 0018:ffff8881dc15f308 EFLAGS: 00010086 [ 21.928095][ T354] RAX: ffff8881dc15f338 RBX: dffffc0000000000 RCX: ffff8881dc155e80 [ 21.935907][ T354] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.943722][ T354] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 21.951528][ T354] R10: ffff8881dc155e80 R11: 0000000000000002 R12: ffffffff84600228 [ 21.959338][ T354] R13: fffffe0000000278 R14: ffff8881dc248000 R15: fffffe000000027b [ 21.967152][ T354] FS: 00005555555ab380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.975916][ T354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.982339][ T354] CR2: 000000000000005c CR3: 00000001dc4ec000 CR4: 00000000003426a0 [ 21.990162][ T354] Kernel panic - not syncing: Fatal exception [ 21.996336][ T354] Kernel Offset: disabled [ 22.000457][ T354] Rebooting in 86400 seconds..