./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor630364644 <...> [ 6.791060][ T194] ip (194) used greatest stack depth: 21784 bytes left [ 7.172657][ T23] kauditd_printk_skb: 47 callbacks suppressed [ 7.172669][ T23] audit: type=1400 audit(1714571772.630:58): avc: denied { use } for pid=243 comm="ssh-keygen" path="/dev/null" dev="devtmpfs" ino=23 scontext=system_u:system_r:ssh_keygen_t tcontext=system_u:system_r:kernel_t tclass=fd permissive=1 [ 7.240371][ T23] audit: type=1400 audit(1714571772.700:59): avc: denied { search } for pid=243 comm="ssh-keygen" name="/" dev="tmpfs" ino=944 scontext=system_u:system_r:ssh_keygen_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 7.267394][ T23] audit: type=1400 audit(1714571772.730:60): avc: denied { use } for pid=248 comm="sshd" path="/dev/null" dev="devtmpfs" ino=23 scontext=system_u:system_r:sshd_t tcontext=system_u:system_r:kernel_t tclass=fd permissive=1 [ 12.837165][ T23] audit: type=1400 audit(1714571778.290:61): avc: denied { transition } for pid=283 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.844761][ T23] audit: type=1400 audit(1714571778.290:62): avc: denied { noatsecure } for pid=283 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.851969][ T23] audit: type=1400 audit(1714571778.300:63): avc: denied { write } for pid=283 comm="sh" path="pipe:[10610]" dev="pipefs" ino=10610 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 12.857884][ T23] audit: type=1400 audit(1714571778.300:64): avc: denied { rlimitinh } for pid=283 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 12.862243][ T23] audit: type=1400 audit(1714571778.300:65): avc: denied { siginh } for pid=283 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.95' (ED25519) to the list of known hosts. execve("./syz-executor630364644", ["./syz-executor630364644"], 0x7ffcfd341aa0 /* 10 vars */) = 0 brk(NULL) = 0x555555fb3000 brk(0x555555fb3d00) = 0x555555fb3d00 arch_prctl(ARCH_SET_FS, 0x555555fb3380) = 0 set_tid_address(0x555555fb3650) = 354 set_robust_list(0x555555fb3660, 24) = 0 rseq(0x555555fb3ca0, 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-executor630364644", 4096) = 27 getrandom("\x9d\xda\x26\xb4\x17\x5d\xb3\xd0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555fb3d00 brk(0x555555fd4d00) = 0x555555fd4d00 brk(0x555555fd5000) = 0x555555fd5000 mprotect(0x7fa373a8c000, 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=0x555555fb3650) = 355 ./strace-static-x86_64: Process 355 attached [pid 355] set_robust_list(0x555555fb3660, 24) = 0 [pid 355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 355] setpgid(0, 0) = 0 [pid 355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 355] write(3, "1000", 4) = 4 [pid 355] close(3) = 0 [pid 355] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [pid 355] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 355] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [pid 355] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 21.752118][ T23] audit: type=1400 audit(1714571787.210:66): avc: denied { execmem } for pid=354 comm="syz-executor630" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.758678][ T23] audit: type=1400 audit(1714571787.210:67): avc: denied { read } for pid=355 comm="syz-executor630" name="kvm" dev="devtmpfs" ino=101 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 21.763924][ T23] audit: type=1400 audit(1714571787.220:68): avc: denied { open } for pid=355 comm="syz-executor630" path="/dev/kvm" dev="devtmpfs" ino=101 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 21.764447][ T355] 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. [ 21.768689][ T23] audit: type=1400 audit(1714571787.220:69): avc: denied { ioctl } for pid=355 comm="syz-executor630" path="/dev/kvm" dev="devtmpfs" ino=101 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 21.809759][ T355] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 21.817366][ T355] #PF: supervisor instruction fetch in kernel mode [ 21.823784][ T355] #PF: error_code(0x0010) - not-present page [ 21.829600][ T355] PGD 1dc6dc067 P4D 1dc6dc067 PUD 1dc6dd067 PMD 0 [ 21.835938][ T355] Oops: 0010 [#1] PREEMPT SMP KASAN [ 21.840972][ T355] CPU: 0 PID: 355 Comm: syz-executor630 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 21.851039][ T355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 21.860952][ T355] RIP: 0010:0x86 [ 21.864321][ T355] Code: Bad RIP value. [ 21.868222][ T355] RSP: 0018:ffff8881dc74f308 EFLAGS: 00010086 [ 21.874126][ T355] RAX: ffff8881dc74f338 RBX: dffffc0000000000 RCX: ffff8881dcb26e40 [ 21.881973][ T355] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.889748][ T355] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 21.897559][ T355] R10: ffff8881dcb26e40 R11: 0000000000000002 R12: ffffffff846015d0 [ 21.905375][ T355] R13: fffffe0000000fd8 R14: ffff8881dc7c8000 R15: fffffe0000000fdb [ 21.913185][ T355] FS: 0000555555fb3380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.921949][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.928398][ T355] CR2: 000000000000005c CR3: 00000001dc66c000 CR4: 00000000003426b0 [ 21.936190][ T355] Call Trace: [ 21.939317][ T355] ? __die+0xb4/0x100 [ 21.943145][ T355] ? no_context+0xbda/0xe50 [ 21.947472][ T355] ? is_prefetch+0x4b0/0x4b0 [ 21.951897][ T355] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 21.957279][ T355] ? __do_page_fault+0xa7d/0xbb0 [ 21.962054][ T355] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 21.967636][ T355] ? __bad_area_nosemaphore+0xc0/0x460 [ 21.972908][ T355] ? page_fault+0x2f/0x40 [ 21.977071][ T355] ? call_function_interrupt+0x20/0x20 [ 21.982454][ T355] ? vmx_handle_exit_irqoff+0x45/0x220 [ 21.987753][ T355] ? check_preemption_disabled+0x91/0x320 [ 21.993300][ T355] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 21.999545][ T355] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 22.005796][ T355] ? call_function_interrupt+0x20/0x20 [ 22.011092][ T355] ? vcpu_enter_guest+0x2d06/0x9f70 [ 22.016126][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.021763][ T355] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 22.027060][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.032669][ T355] ? _raw_spin_lock+0x1b0/0x1b0 [ 22.037302][ T355] ? debug_smp_processor_id+0x20/0x20 [ 22.042514][ T355] ? local_bh_enable+0x20/0x20 [ 22.047113][ T355] ? internal_add_timer+0x34b/0x430 [ 22.052144][ T355] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 22.057803][ T355] ? __mod_timer+0x72b/0x13e0 [ 22.062310][ T355] ? mod_timer_pending+0x20/0x20 [ 22.067073][ T355] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 22.072373][ T355] ? read_msr+0x40/0x40 [ 22.076362][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.081914][ T355] ? __fd_install+0x119/0x230 [ 22.086433][ T355] ? update_load_avg+0x40f/0x1210 [ 22.091374][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.097018][ T355] ? debug_smp_processor_id+0x20/0x20 [ 22.102226][ T355] ? resched_curr+0x9b/0x200 [ 22.106650][ T355] ? check_preempt_wakeup+0x4f6/0x9f0 [ 22.111863][ T355] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 22.116963][ T355] ? try_to_wake_up+0x7c5/0x14f0 [ 22.121673][ T355] ? read_msr+0x40/0x40 [ 22.125662][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.131219][ T355] ? check_preemption_disabled+0x9f/0x320 [ 22.136772][ T355] ? debug_smp_processor_id+0x20/0x20 [ 22.141978][ T355] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 22.147535][ T355] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 22.152217][ T355] ? create_vcpu_fd+0x120/0x120 [ 22.156902][ T355] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 22.161850][ T355] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.167233][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 22.172444][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 22.177648][ T355] ? cgroup_leave_frozen+0x13c/0x290 [ 22.182769][ T355] ? ptrace_stop+0x6ee/0xa30 [ 22.187200][ T355] ? create_vcpu_fd+0x120/0x120 [ 22.191883][ T355] ? do_vfs_ioctl+0x742/0x1720 [ 22.196484][ T355] ? ioctl_preallocate+0x250/0x250 [ 22.201430][ T355] ? check_preemption_disabled+0x153/0x320 [ 22.207070][ T355] ? syscall_trace_enter+0x650/0x940 [ 22.212192][ T355] ? do_syscall_64+0x1c0/0x1c0 [ 22.216794][ T355] ? switch_fpu_return+0x1d4/0x410 [ 22.221739][ T355] ? security_file_ioctl+0x7d/0xa0 [ 22.226685][ T355] ? __x64_sys_ioctl+0xd4/0x110 [ 22.231370][ T355] ? do_syscall_64+0xca/0x1c0 [ 22.235884][ T355] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 22.241793][ T355] Modules linked in: [ 22.245534][ T355] CR2: 0000000000000086 [ 22.249521][ T355] ---[ end trace 71dc6f6b7d21977b ]--- [ 22.254818][ T355] RIP: 0010:0x86 [ 22.258190][ T355] Code: Bad RIP value. [ 22.262110][ T355] RSP: 0018:ffff8881dc74f308 EFLAGS: 00010086 [ 22.268001][ T355] RAX: ffff8881dc74f338 RBX: dffffc0000000000 RCX: ffff8881dcb26e40 [ 22.275805][ T355] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.283616][ T355] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.291428][ T355] R10: ffff8881dcb26e40 R11: 0000000000000002 R12: ffffffff846015d0 [ 22.299242][ T355] R13: fffffe0000000fd8 R14: ffff8881dc7c8000 R15: fffffe0000000fdb [ 22.307053][ T355] FS: 0000555555fb3380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 22.315832][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.322346][ T355] CR2: 000000000000005c CR3: 00000001dc66c000 CR4: 00000000003426b0 [ 22.330225][ T355] Kernel panic - not syncing: Fatal exception [ 22.336405][ T355] Kernel Offset: disabled [ 22.340528][ T355] Rebooting in 86400 seconds..