./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor283160508 <...> 14746606.100:64): avc: denied { rlimitinh } for pid=289 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 16.704291][ T23] audit: type=1400 audit(1714746606.100:65): avc: denied { siginh } for pid=289 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 18.459273][ T290] sshd (290) used greatest stack depth: 21720 bytes left Warning: Permanently added '10.128.1.37' (ED25519) to the list of known hosts. execve("./syz-executor283160508", ["./syz-executor283160508"], 0x7ffe76981570 /* 10 vars */) = 0 brk(NULL) = 0x555555733000 brk(0x555555733d00) = 0x555555733d00 arch_prctl(ARCH_SET_FS, 0x555555733380) = 0 set_tid_address(0x555555733650) = 359 set_robust_list(0x555555733660, 24) = 0 rseq(0x555555733ca0, 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-executor283160508", 4096) = 27 getrandom("\xbc\x53\x07\xf2\xe8\x72\x02\x3e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555733d00 brk(0x555555754d00) = 0x555555754d00 brk(0x555555755000) = 0x555555755000 mprotect(0x7fa989c0f000, 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=0x555555733650) = 360 ./strace-static-x86_64: Process 360 attached [pid 360] set_robust_list(0x555555733660, 24) = 0 [pid 360] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 360] setpgid(0, 0) = 0 [pid 360] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 360] write(3, "1000", 4) = 4 [pid 360] close(3) = 0 [pid 360] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 25.929717][ T23] audit: type=1400 audit(1714746615.380:66): avc: denied { execmem } for pid=359 comm="syz-executor283" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.954106][ T23] audit: type=1400 audit(1714746615.400:67): avc: denied { read } for pid=360 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 [ 25.970149][ T360] 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. [ 25.976972][ T23] audit: type=1400 audit(1714746615.400:68): avc: denied { open } for pid=360 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 [pid 360] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 360] ioctl(4, KVM_CREATE_IRQCHIP, 0) = 0 [pid 360] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 26.016763][ T23] audit: type=1400 audit(1714746615.420:69): avc: denied { ioctl } for pid=360 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 [ 26.066993][ T360] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 26.074606][ T360] #PF: supervisor instruction fetch in kernel mode [ 26.081562][ T360] #PF: error_code(0x0010) - not-present page [ 26.087359][ T360] PGD 1de6e8067 P4D 1de6e8067 PUD 1e26a8067 PMD 0 [ 26.093906][ T360] Oops: 0010 [#1] PREEMPT SMP KASAN [ 26.098926][ T360] CPU: 0 PID: 360 Comm: syz-executor283 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0 [ 26.108994][ T360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 26.119230][ T360] RIP: 0010:0x86 [ 26.122624][ T360] Code: Bad RIP value. [ 26.126528][ T360] RSP: 0018:ffff8881db84f308 EFLAGS: 00010086 [ 26.132404][ T360] RAX: ffff8881db84f338 RBX: dffffc0000000000 RCX: ffff8881dc7dcec0 [ 26.140223][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.148026][ T360] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 26.155837][ T360] R10: ffff8881dc7dcec0 R11: 0000000000000002 R12: ffffffff84600238 [ 26.163647][ T360] R13: fffffe0000000298 R14: ffff8881db8e0000 R15: fffffe000000029b [ 26.171459][ T360] FS: 0000555555733380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 26.180225][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.186648][ T360] CR2: 000000000000005c CR3: 00000001e0251000 CR4: 00000000003426b0 [ 26.194461][ T360] Call Trace: [ 26.197608][ T360] ? __die+0xb4/0x100 [ 26.201408][ T360] ? no_context+0xbda/0xe50 [ 26.205783][ T360] ? is_prefetch+0x4b0/0x4b0 [ 26.210177][ T360] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 26.215561][ T360] ? __do_page_fault+0xa7d/0xbb0 [ 26.220339][ T360] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 26.225886][ T360] ? __bad_area_nosemaphore+0xc0/0x460 [ 26.231176][ T360] ? page_fault+0x2f/0x40 [ 26.235339][ T360] ? irq_entries_start+0x48/0x660 [ 26.240207][ T360] ? vmx_handle_exit_irqoff+0x45/0x220 [ 26.245497][ T360] ? check_preemption_disabled+0x91/0x320 [ 26.251052][ T360] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 26.257519][ T360] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 26.263748][ T360] ? irq_entries_start+0x48/0x660 [ 26.268605][ T360] ? vcpu_enter_guest+0x2d06/0x9f70 [ 26.273640][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.279194][ T360] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 26.284491][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.290042][ T360] ? _raw_spin_lock+0x1b0/0x1b0 [ 26.294747][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.299940][ T360] ? local_bh_enable+0x20/0x20 [ 26.304547][ T360] ? internal_add_timer+0x34b/0x430 [ 26.309582][ T360] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 26.315214][ T360] ? __mod_timer+0x72b/0x13e0 [ 26.319729][ T360] ? mod_timer_pending+0x20/0x20 [ 26.324501][ T360] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 26.329793][ T360] ? read_msr+0x40/0x40 [ 26.333785][ T360] ? kvm_arch_vcpu_put+0x352/0x580 [ 26.338734][ T360] ? __fd_install+0x119/0x230 [ 26.343246][ T360] ? update_load_avg+0x40f/0x1210 [ 26.348109][ T360] ? sched_clock_cpu+0x18/0x3a0 [ 26.352794][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.358350][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.363559][ T360] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 26.368594][ T360] ? try_to_wake_up+0x7c5/0x14f0 [ 26.373365][ T360] ? read_msr+0x40/0x40 [ 26.377359][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.382915][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.388467][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.393697][ T360] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 26.399231][ T360] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 26.403917][ T360] ? create_vcpu_fd+0x120/0x120 [ 26.408603][ T360] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 26.413565][ T360] ? _raw_spin_lock_irqsave+0x210/0x210 [ 26.418937][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 26.424140][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 26.429351][ T360] ? cgroup_leave_frozen+0x13c/0x290 [ 26.434467][ T360] ? ptrace_stop+0x6ee/0xa30 [ 26.438897][ T360] ? create_vcpu_fd+0x120/0x120 [ 26.443668][ T360] ? do_vfs_ioctl+0x742/0x1720 [ 26.448272][ T360] ? ioctl_preallocate+0x250/0x250 [ 26.453216][ T360] ? check_preemption_disabled+0x153/0x320 [ 26.458856][ T360] ? syscall_trace_enter+0x650/0x940 [ 26.463977][ T360] ? do_syscall_64+0x1c0/0x1c0 [ 26.468592][ T360] ? switch_fpu_return+0x1d4/0x410 [ 26.473523][ T360] ? common_interrupt+0xa/0xf [ 26.478035][ T360] ? security_file_ioctl+0x7d/0xa0 [ 26.482984][ T360] ? __x64_sys_ioctl+0xd4/0x110 [ 26.487670][ T360] ? do_syscall_64+0xca/0x1c0 [ 26.492182][ T360] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 26.498081][ T360] Modules linked in: [ 26.501825][ T360] CR2: 0000000000000086 [ 26.505816][ T360] ---[ end trace dbd3679dbc6f39b3 ]--- [ 26.511105][ T360] RIP: 0010:0x86 [ 26.514489][ T360] Code: Bad RIP value. [ 26.518388][ T360] RSP: 0018:ffff8881db84f308 EFLAGS: 00010086 [ 26.524294][ T360] RAX: ffff8881db84f338 RBX: dffffc0000000000 RCX: ffff8881dc7dcec0 [ 26.532107][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.539916][ T360] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 26.547726][ T360] R10: ffff8881dc7dcec0 R11: 0000000000000002 R12: ffffffff84600238 [ 26.555537][ T360] R13: fffffe0000000298 R14: ffff8881db8e0000 R15: fffffe000000029b [ 26.563351][ T360] FS: 0000555555733380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 26.572116][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.578536][ T360] CR2: 000000000000005c CR3: 00000001e0251000 CR4: 00000000003426b0 [ 26.586352][ T360] Kernel panic - not syncing: Fatal exception [ 26.592488][ T360] Kernel Offset: disabled [ 26.596699][ T360] Rebooting in 86400 seconds..