./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor622975941 <...> Warning: Permanently added '10.128.1.118' (ED25519) to the list of known hosts. execve("./syz-executor622975941", ["./syz-executor622975941"], 0x7fff1e35f4d0 /* 10 vars */) = 0 brk(NULL) = 0x555556711000 brk(0x555556711d00) = 0x555556711d00 arch_prctl(ARCH_SET_FS, 0x555556711380) = 0 set_tid_address(0x555556711650) = 355 set_robust_list(0x555556711660, 24) = 0 rseq(0x555556711ca0, 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-executor622975941", 4096) = 27 getrandom("\x1d\x2a\x07\xa0\x61\x5c\xa3\x34", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556711d00 brk(0x555556732d00) = 0x555556732d00 brk(0x555556733000) = 0x555556733000 mprotect(0x7f2945d22000, 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./strace-static-x86_64: Process 356 attached [pid 356] set_robust_list(0x555556711660, 24) = 0 [pid 356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 356] setpgid(0, 0) = 0 [pid 356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 356] write(3, "1000", 4) = 4 [pid 356] close(3 [pid 355] <... clone resumed>, child_tidptr=0x555556711650) = 356 [pid 356] <... close resumed>) = 0 executing program [pid 356] write(1, "executing program\n", 18) = 18 [pid 356] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [pid 356] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 356] dup(4) = 5 [pid 356] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 21.437786][ T23] audit: type=1400 audit(1719369720.249:66): avc: denied { execmem } for pid=355 comm="syz-executor622" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.443128][ T23] audit: type=1400 audit(1719369720.259:67): avc: denied { read } for pid=356 comm="syz-executor622" 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 [ 21.446479][ T23] audit: type=1400 audit(1719369720.259:68): avc: denied { open } for pid=356 comm="syz-executor622" 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 [ 21.446915][ T356] 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. [ 21.450134][ T23] audit: type=1400 audit(1719369720.259:69): avc: denied { ioctl } for pid=356 comm="syz-executor622" 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 [ 21.473706][ T356] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 21.481310][ T356] #PF: supervisor instruction fetch in kernel mode [ 21.487645][ T356] #PF: error_code(0x0010) - not-present page [ 21.493466][ T356] PGD 1dbcef067 P4D 1dbcef067 PUD 1dbcf0067 PMD 0 [ 21.499802][ T356] Oops: 0010 [#1] PREEMPT SMP KASAN [ 21.504833][ T356] CPU: 0 PID: 356 Comm: syz-executor622 Not tainted 5.4.274-syzkaller-00002-g6f97bd951d82 #0 [ 21.514812][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 21.524726][ T356] RIP: 0010:0x86 [ 21.528091][ T356] Code: Bad RIP value. [ 21.531997][ T356] RSP: 0018:ffff8881e1117308 EFLAGS: 00010086 [ 21.537908][ T356] RAX: ffff8881e1117338 RBX: dffffc0000000000 RCX: ffff8881dbe42f40 [ 21.545711][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.553523][ T356] RBP: 0000000000000290 R08: ffffffff82316ca1 R09: ffffffff811c90d5 [ 21.561338][ T356] R10: ffff8881dbe42f40 R11: 0000000000000002 R12: ffffffff84600238 [ 21.569146][ T356] R13: fffffe0000000298 R14: ffff8881db988000 R15: fffffe000000029b [ 21.576959][ T356] FS: 0000555556711380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.585730][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.592145][ T356] CR2: 000000000000005c CR3: 00000001dbce0000 CR4: 00000000003426b0 [ 21.599958][ T356] Call Trace: [ 21.603097][ T356] ? __die+0xb4/0x100 [ 21.606905][ T356] ? no_context+0xbda/0xe50 [ 21.611246][ T356] ? is_prefetch+0x4b0/0x4b0 [ 21.615670][ T356] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 21.621065][ T356] ? __do_page_fault+0xa7d/0xbb0 [ 21.625831][ T356] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 21.631385][ T356] ? __bad_area_nosemaphore+0xc0/0x460 [ 21.636679][ T356] ? page_fault+0x2f/0x40 [ 21.640843][ T356] ? irq_entries_start+0x48/0x660 [ 21.645704][ T356] ? vmx_handle_exit_irqoff+0x45/0x220 [ 21.651469][ T356] ? check_preemption_disabled+0x91/0x320 [ 21.657020][ T356] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 21.663267][ T356] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 21.669530][ T356] ? irq_entries_start+0x48/0x660 [ 21.674383][ T356] ? vcpu_enter_guest+0x2d06/0x9f70 [ 21.679419][ T356] ? find_next_and_bit+0x156/0x190 [ 21.684371][ T356] ? load_balance+0x43e1/0x7a40 [ 21.689046][ T356] ? local_bh_enable+0x20/0x20 [ 21.693649][ T356] ? check_preemption_disabled+0x9f/0x320 [ 21.699200][ T356] ? debug_smp_processor_id+0x20/0x20 [ 21.704493][ T356] ? llist_add_batch+0x91/0xb0 [ 21.709096][ T356] ? generic_exec_single+0x280/0x3e0 [ 21.714216][ T356] ? smp_call_function_single+0x4a0/0x4a0 [ 21.719771][ T356] ? smp_call_function_single+0x388/0x4a0 [ 21.725325][ T356] ? loaded_vmcs_clear+0x80/0x80 [ 21.730099][ T356] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 21.737040][ T356] ? check_preemption_disabled+0x9f/0x320 [ 21.742595][ T356] ? loaded_vmcs_clear+0x80/0x80 [ 21.747369][ T356] ? debug_smp_processor_id+0x20/0x20 [ 21.752579][ T356] ? get_cpu_entry_area+0x8/0x30 [ 21.757351][ T356] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 21.762387][ T356] ? read_msr+0x40/0x40 [ 21.766383][ T356] ? update_rq_clock+0x67/0x350 [ 21.771067][ T356] ? check_preemption_disabled+0x9f/0x320 [ 21.776621][ T356] ? debug_smp_processor_id+0x20/0x20 [ 21.781831][ T356] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 21.787395][ T356] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 21.792070][ T356] ? create_vcpu_fd+0x120/0x120 [ 21.796756][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 21.801704][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 21.807086][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 21.812313][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 21.817499][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 21.822625][ T356] ? ptrace_stop+0x6ee/0xa30 [ 21.827047][ T356] ? create_vcpu_fd+0x120/0x120 [ 21.831735][ T356] ? do_vfs_ioctl+0x742/0x1720 [ 21.836336][ T356] ? ioctl_preallocate+0x250/0x250 [ 21.841282][ T356] ? check_preemption_disabled+0x153/0x320 [ 21.846924][ T356] ? syscall_trace_enter+0x650/0x940 [ 21.852045][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 21.856643][ T356] ? switch_fpu_return+0x1d4/0x410 [ 21.861595][ T356] ? security_file_ioctl+0x7d/0xa0 [ 21.866540][ T356] ? __x64_sys_ioctl+0xd4/0x110 [ 21.871226][ T356] ? do_syscall_64+0xca/0x1c0 [ 21.875738][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 21.881636][ T356] Modules linked in: [ 21.885406][ T356] CR2: 0000000000000086 [ 21.889374][ T356] ---[ end trace f865d7e2323d62c6 ]--- [ 21.894658][ T356] RIP: 0010:0x86 [ 21.898046][ T356] Code: Bad RIP value. [ 21.901946][ T356] RSP: 0018:ffff8881e1117308 EFLAGS: 00010086 [ 21.907851][ T356] RAX: ffff8881e1117338 RBX: dffffc0000000000 RCX: ffff8881dbe42f40 [ 21.915660][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.923475][ T356] RBP: 0000000000000290 R08: ffffffff82316ca1 R09: ffffffff811c90d5 [ 21.931297][ T356] R10: ffff8881dbe42f40 R11: 0000000000000002 R12: ffffffff84600238 [ 21.939110][ T356] R13: fffffe0000000298 R14: ffff8881db988000 R15: fffffe000000029b [ 21.946916][ T356] FS: 0000555556711380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.955673][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.962096][ T356] CR2: 000000000000005c CR3: 00000001dbce0000 CR4: 00000000003426b0 [ 21.969912][ T356] Kernel panic - not syncing: Fatal exception [ 21.976054][ T356] Kernel Offset: disabled [ 21.980169][ T356] Rebooting in 86400 seconds..