./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor812697253 <...> Warning: Permanently added '10.128.10.11' (ED25519) to the list of known hosts. execve("./syz-executor812697253", ["./syz-executor812697253"], 0x7ffc3ddbed90 /* 10 vars */) = 0 brk(NULL) = 0x55555730f000 brk(0x55555730fd00) = 0x55555730fd00 arch_prctl(ARCH_SET_FS, 0x55555730f380) = 0 set_tid_address(0x55555730f650) = 356 set_robust_list(0x55555730f660, 24) = 0 rseq(0x55555730fca0, 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-executor812697253", 4096) = 27 getrandom("\xde\x43\xa7\x26\x27\xa7\x6f\x53", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555730fd00 brk(0x555557330d00) = 0x555557330d00 brk(0x555557331000) = 0x555557331000 mprotect(0x7f32bc238000, 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=0x55555730f650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x55555730f660, 24) = 0 [pid 357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 357] setpgid(0, 0) = 0 [pid 357] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 357] write(3, "1000", 4) = 4 [pid 357] close(3) = 0 [pid 357] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 23.446216][ T23] audit: type=1400 audit(1714151177.910:66): avc: denied { execmem } for pid=356 comm="syz-executor812" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.470824][ T23] audit: type=1400 audit(1714151177.940:67): avc: denied { read } for pid=357 comm="syz-executor812" name="kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.493698][ T23] audit: type=1400 audit(1714151177.940:68): avc: denied { open } for pid=357 comm="syz-executor812" path="/dev/kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.494576][ 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. [pid 357] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 357] ioctl(4, KVM_CREATE_IRQCHIP, 0) = 0 [pid 357] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 23.517227][ T23] audit: type=1400 audit(1714151177.970:69): avc: denied { ioctl } for pid=357 comm="syz-executor812" path="/dev/kvm" dev="devtmpfs" ino=104 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.578712][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.586321][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.592657][ T357] #PF: error_code(0x0010) - not-present page [ 23.598472][ T357] PGD 1dc671067 P4D 1dc671067 PUD 1dc672067 PMD 0 [ 23.604813][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.609848][ T357] CPU: 1 PID: 357 Comm: syz-executor812 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 23.619829][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.629746][ T357] RIP: 0010:0x86 [ 23.633192][ T357] Code: Bad RIP value. [ 23.637099][ T357] RSP: 0018:ffff8881dc767308 EFLAGS: 00010086 [ 23.643003][ T357] RAX: ffff8881dc767338 RBX: dffffc0000000000 RCX: ffff8881dc700fc0 [ 23.654580][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.662476][ T357] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.670293][ T357] R10: ffff8881dc700fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 23.678220][ T357] R13: fffffe0000000fd8 R14: ffff8881dc028000 R15: fffffe0000000fdb [ 23.686035][ T357] FS: 000055555730f380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.694886][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.701307][ T357] CR2: 000000000000005c CR3: 00000001dc665000 CR4: 00000000003426a0 [ 23.709121][ T357] Call Trace: [ 23.712253][ T357] ? __die+0xb4/0x100 [ 23.716066][ T357] ? no_context+0xbda/0xe50 [ 23.720405][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.724831][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.730213][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 23.734987][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.740540][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.745923][ T357] ? page_fault+0x2f/0x40 [ 23.750084][ T357] ? call_function_interrupt+0x20/0x20 [ 23.755389][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.760769][ T357] ? check_preemption_disabled+0x91/0x320 [ 23.766326][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.772736][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.778975][ T357] ? call_function_interrupt+0x20/0x20 [ 23.784267][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.789302][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.794857][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.800173][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.805708][ T357] ? _raw_spin_lock+0x1b0/0x1b0 [ 23.810393][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.815598][ T357] ? local_bh_enable+0x20/0x20 [ 23.820350][ T357] ? internal_add_timer+0x34b/0x430 [ 23.825550][ T357] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 23.831193][ T357] ? __mod_timer+0x72b/0x13e0 [ 23.835719][ T357] ? mod_timer_pending+0x20/0x20 [ 23.840479][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 23.845785][ T357] ? read_msr+0x40/0x40 [ 23.849775][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.855318][ T357] ? __fd_install+0x119/0x230 [ 23.859834][ T357] ? update_load_avg+0x40f/0x1210 [ 23.864690][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.870246][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.875455][ T357] ? resched_curr+0x9b/0x200 [ 23.879880][ T357] ? check_preempt_wakeup+0x4f6/0x9f0 [ 23.885128][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.890125][ T357] ? try_to_wake_up+0x7c5/0x14f0 [ 23.894894][ T357] ? read_msr+0x40/0x40 [ 23.898889][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.904444][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.910083][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.915389][ T357] ? kvm_check_async_pf_completion+0x335/0x350 [ 23.921377][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.926927][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.931611][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.936296][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.941254][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.946626][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.951919][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.957126][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 23.962338][ T357] ? ptrace_stop+0x6ee/0xa30 [ 23.966777][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.971544][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 23.976136][ T357] ? ioctl_preallocate+0x250/0x250 [ 23.981088][ T357] ? check_preemption_disabled+0x153/0x320 [ 23.986724][ T357] ? syscall_trace_enter+0x650/0x940 [ 23.991876][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 23.996446][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.001653][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.006614][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.011287][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.015817][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.021695][ T357] Modules linked in: [ 24.025441][ T357] CR2: 0000000000000086 [ 24.029430][ T357] ---[ end trace 40a1d556cc2bbb08 ]--- [ 24.034728][ T357] RIP: 0010:0x86 [ 24.038214][ T357] Code: Bad RIP value. [ 24.042126][ T357] RSP: 0018:ffff8881dc767308 EFLAGS: 00010086 [ 24.048043][ T357] RAX: ffff8881dc767338 RBX: dffffc0000000000 RCX: ffff8881dc700fc0 [ 24.055830][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.063649][ T357] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 24.071458][ T357] R10: ffff8881dc700fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 24.079284][ T357] R13: fffffe0000000fd8 R14: ffff8881dc028000 R15: fffffe0000000fdb [ 24.087252][ T357] FS: 000055555730f380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.096103][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.102526][ T357] CR2: 000000000000005c CR3: 00000001dc665000 CR4: 00000000003426a0 [ 24.110338][ T357] Kernel panic - not syncing: Fatal exception [ 24.116510][ T357] Kernel Offset: disabled [ 24.120629][ T357] Rebooting in 86400 seconds..