./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor63550651 <...> Warning: Permanently added '10.128.0.48' (ED25519) to the list of known hosts. execve("./syz-executor63550651", ["./syz-executor63550651"], 0x7fff1a2bcfd0 /* 10 vars */) = 0 brk(NULL) = 0x555582a86000 brk(0x555582a86d00) = 0x555582a86d00 arch_prctl(ARCH_SET_FS, 0x555582a86380) = 0 set_tid_address(0x555582a86650) = 360 set_robust_list(0x555582a86660, 24) = 0 rseq(0x555582a86ca0, 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-executor63550651", 4096) = 26 getrandom("\xf0\xc3\x8e\xe3\x69\x78\xb6\x0f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555582a86d00 brk(0x555582aa7d00) = 0x555582aa7d00 brk(0x555582aa8000) = 0x555582aa8000 mprotect(0x7f06473f2000, 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=0x555582a86650) = 361 ./strace-static-x86_64: Process 361 attached [pid 361] set_robust_list(0x555582a86660, 24) = 0 [pid 361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 361] setpgid(0, 0) = 0 [pid 361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 361] write(3, "1000", 4) = 4 [pid 361] close(3executing program ) = 0 [pid 361] write(1, "executing program\n", 18) = 18 [pid 361] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 27.109561][ T23] audit: type=1400 audit(1738409607.660:66): avc: denied { execmem } for pid=360 comm="syz-executor635" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 27.120066][ T361] 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 361] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 361] ioctl(4, KVM_CREATE_IRQCHIP, 0) = 0 [ 27.129331][ T23] audit: type=1400 audit(1738409607.670:67): avc: denied { read } for pid=361 comm="syz-executor635" 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 [ 27.167417][ T23] audit: type=1400 audit(1738409607.670:68): avc: denied { open } for pid=361 comm="syz-executor635" 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 [pid 361] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 27.190943][ T23] audit: type=1400 audit(1738409607.670:69): avc: denied { ioctl } for pid=361 comm="syz-executor635" 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 [ 27.224145][ T361] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 27.231741][ T361] #PF: supervisor instruction fetch in kernel mode [ 27.238074][ T361] #PF: error_code(0x0010) - not-present page [ 27.243888][ T361] PGD 1de4ba067 P4D 1de4ba067 PUD 1dfff2067 PMD 0 [ 27.250226][ T361] Oops: 0010 [#1] PREEMPT SMP KASAN [ 27.255262][ T361] CPU: 1 PID: 361 Comm: syz-executor635 Not tainted 5.4.289-syzkaller-00028-g3f2c17e79750 #0 [ 27.265239][ T361] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 [ 27.275152][ T361] RIP: 0010:0x86 [ 27.278522][ T361] Code: Bad RIP value. [ 27.282425][ T361] RSP: 0018:ffff8881e01b7308 EFLAGS: 00010086 [ 27.288328][ T361] RAX: ffff8881e01b7338 RBX: dffffc0000000000 RCX: ffff8881f5e15e80 [ 27.296137][ T361] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 27.303950][ T361] RBP: 0000000000000270 R08: ffffffff8231c921 R09: ffffffff811c8f95 [ 27.311759][ T361] R10: ffff8881f5e15e80 R11: 0000000000000002 R12: ffffffff84600228 [ 27.319573][ T361] R13: fffffe0000000278 R14: ffff8881da308000 R15: fffffe000000027b [ 27.327385][ T361] FS: 0000555582a86380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 27.336152][ T361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.342571][ T361] CR2: 000000000000005c CR3: 00000001f3bc5000 CR4: 00000000003426a0 [ 27.350383][ T361] Call Trace: [ 27.353521][ T361] ? __die+0xb4/0x100 [ 27.357330][ T361] ? no_context+0xac7/0xd20 [ 27.361670][ T361] ? is_prefetch+0x4b0/0x4b0 [ 27.366093][ T361] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 27.371477][ T361] ? __do_page_fault+0xa72/0xbb0 [ 27.376249][ T361] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 27.381803][ T361] ? __bad_area_nosemaphore+0xc0/0x470 [ 27.387097][ T361] ? page_fault+0x2f/0x40 [ 27.391263][ T361] ? irq_entries_start+0x38/0x660 [ 27.396127][ T361] ? vmx_handle_exit_irqoff+0x45/0x220 [ 27.401422][ T361] ? check_preemption_disabled+0x91/0x320 [ 27.406974][ T361] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 27.413221][ T361] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 27.419470][ T361] ? irq_entries_start+0x38/0x660 [ 27.424331][ T361] ? vcpu_enter_guest+0x2d06/0x9f70 [ 27.429367][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.434934][ T361] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 27.440218][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.445768][ T361] ? _raw_spin_lock+0x1b0/0x1b0 [ 27.450459][ T361] ? debug_smp_processor_id+0x20/0x20 [ 27.455665][ T361] ? local_bh_enable+0x20/0x20 [ 27.460266][ T361] ? internal_add_timer+0x34b/0x430 [ 27.465300][ T361] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 27.470940][ T361] ? __mod_timer+0x72b/0x13e0 [ 27.475454][ T361] ? mod_timer_pending+0x20/0x20 [ 27.480230][ T361] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 27.485530][ T361] ? read_msr+0x40/0x40 [ 27.489512][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.495070][ T361] ? __fd_install+0x119/0x230 [ 27.499581][ T361] ? update_load_avg+0x40f/0x1210 [ 27.504439][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.509994][ T361] ? debug_smp_processor_id+0x20/0x20 [ 27.515202][ T361] ? resched_curr+0x9b/0x200 [ 27.519639][ T361] ? check_preempt_wakeup+0x4f6/0x9f0 [ 27.524839][ T361] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 27.529871][ T361] ? try_to_wake_up+0x7c5/0x14f0 [ 27.534644][ T361] ? read_msr+0x40/0x40 [ 27.538636][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.544191][ T361] ? check_preemption_disabled+0x9f/0x320 [ 27.549747][ T361] ? debug_smp_processor_id+0x20/0x20 [ 27.554956][ T361] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 27.560513][ T361] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 27.565197][ T361] ? create_vcpu_fd+0x120/0x120 [ 27.569883][ T361] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 27.574829][ T361] ? _raw_spin_lock_irqsave+0x210/0x210 [ 27.580211][ T361] ? cgroup_update_frozen+0x157/0xab0 [ 27.585415][ T361] ? cgroup_update_frozen+0x157/0xab0 [ 27.590625][ T361] ? cgroup_leave_frozen+0x13c/0x290 [ 27.595746][ T361] ? ptrace_stop+0x6ee/0xa30 [ 27.600174][ T361] ? create_vcpu_fd+0x120/0x120 [ 27.604860][ T361] ? do_vfs_ioctl+0x742/0x1720 [ 27.609458][ T361] ? ioctl_preallocate+0x250/0x250 [ 27.614421][ T361] ? check_preemption_disabled+0x153/0x320 [ 27.620046][ T361] ? syscall_trace_enter+0x650/0x940 [ 27.625167][ T361] ? do_syscall_64+0x1c0/0x1c0 [ 27.629779][ T361] ? switch_fpu_return+0x1d4/0x410 [ 27.634717][ T361] ? security_file_ioctl+0x7d/0xa0 [ 27.639671][ T361] ? __x64_sys_ioctl+0xd4/0x110 [ 27.644350][ T361] ? do_syscall_64+0xca/0x1c0 [ 27.648864][ T361] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 27.654764][ T361] Modules linked in: [ 27.658507][ T361] CR2: 0000000000000086 [ 27.662493][ T361] ---[ end trace bfe974e09dc73158 ]--- [ 27.667781][ T361] RIP: 0010:0x86 [ 27.671173][ T361] Code: Bad RIP value. [ 27.675070][ T361] RSP: 0018:ffff8881e01b7308 EFLAGS: 00010086 [ 27.680976][ T361] RAX: ffff8881e01b7338 RBX: dffffc0000000000 RCX: ffff8881f5e15e80 [ 27.688784][ T361] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 27.696595][ T361] RBP: 0000000000000270 R08: ffffffff8231c921 R09: ffffffff811c8f95 [ 27.704406][ T361] R10: ffff8881f5e15e80 R11: 0000000000000002 R12: ffffffff84600228 [ 27.712219][ T361] R13: fffffe0000000278 R14: ffff8881da308000 R15: fffffe000000027b [ 27.720032][ T361] FS: 0000555582a86380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 27.728795][ T361] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.735223][ T361] CR2: 000000000000005c CR3: 00000001f3bc5000 CR4: 00000000003426a0 [ 27.743031][ T361] Kernel panic - not syncing: Fatal exception [ 27.749143][ T361] Kernel Offset: disabled [ 27.753257][ T361] Rebooting in 86400 seconds..