./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4079138968 <...> [ 5.370502][ T162] udevd[162]: starting eudev-3.2.11 [ 5.372772][ T161] udevd (161) used greatest stack depth: 23096 bytes left [ 6.235381][ T193] ip (193) used greatest stack depth: 22328 bytes left [ 15.223922][ T23] kauditd_printk_skb: 50 callbacks suppressed [ 15.223930][ T23] audit: type=1400 audit(1715282145.929:61): avc: denied { transition } for pid=287 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 [ 15.228689][ T23] audit: type=1400 audit(1715282145.929:62): avc: denied { noatsecure } for pid=287 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.232104][ T23] audit: type=1400 audit(1715282145.939:63): avc: denied { write } for pid=287 comm="sh" path="pipe:[10444]" dev="pipefs" ino=10444 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 15.236316][ T23] audit: type=1400 audit(1715282145.939:64): avc: denied { rlimitinh } for pid=287 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 15.239956][ T23] audit: type=1400 audit(1715282145.939:65): avc: denied { siginh } for pid=287 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 16.684220][ T288] sshd (288) used greatest stack depth: 21464 bytes left Warning: Permanently added '10.128.0.189' (ED25519) to the list of known hosts. execve("./syz-executor4079138968", ["./syz-executor4079138968"], 0x7ffee08664c0 /* 10 vars */) = 0 brk(NULL) = 0x555556589000 brk(0x555556589d00) = 0x555556589d00 arch_prctl(ARCH_SET_FS, 0x555556589380) = 0 set_tid_address(0x555556589650) = 356 set_robust_list(0x555556589660, 24) = 0 rseq(0x555556589ca0, 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-executor4079138968", 4096) = 28 getrandom("\x35\xc0\x5b\x83\x13\x84\xa3\x92", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556589d00 brk(0x5555565aad00) = 0x5555565aad00 brk(0x5555565ab000) = 0x5555565ab000 mprotect(0x7f2493ce2000, 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=0x555556589650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555556589660, 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 [ 24.291292][ T23] audit: type=1400 audit(1715282154.999:66): avc: denied { execmem } for pid=356 comm="syz-executor407" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.314461][ T23] audit: type=1400 audit(1715282155.019:67): avc: denied { read } for pid=357 comm="syz-executor407" name="kvm" dev="devtmpfs" ino=109 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.320653][ 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. [ 24.337189][ T23] audit: type=1400 audit(1715282155.019:68): avc: denied { open } for pid=357 comm="syz-executor407" path="/dev/kvm" dev="devtmpfs" ino=109 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [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 [ 24.375992][ T23] audit: type=1400 audit(1715282155.029:69): avc: denied { ioctl } for pid=357 comm="syz-executor407" path="/dev/kvm" dev="devtmpfs" ino=109 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.422026][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.429639][ T357] #PF: supervisor instruction fetch in kernel mode [ 24.435965][ T357] #PF: error_code(0x0010) - not-present page [ 24.441780][ T357] PGD 1e101a067 P4D 1e101a067 PUD 1e0dbf067 PMD 0 [ 24.448117][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.453154][ T357] CPU: 1 PID: 357 Comm: syz-executor407 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0 [ 24.463131][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 24.473046][ T357] RIP: 0010:0x86 [ 24.476501][ T357] Code: Bad RIP value. [ 24.480406][ T357] RSP: 0018:ffff8881dbc3f308 EFLAGS: 00010086 [ 24.486307][ T357] RAX: ffff8881dbc3f338 RBX: dffffc0000000000 RCX: ffff8881e0d09f80 [ 24.494118][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.501933][ T357] RBP: 0000000000000270 R08: ffffffff82316361 R09: ffffffff811c9085 [ 24.509752][ T357] R10: ffff8881e0d09f80 R11: 0000000000000002 R12: ffffffff84600228 [ 24.517565][ T357] R13: fffffe0000000278 R14: ffff8881dbd10000 R15: fffffe000000027b [ 24.525459][ T357] FS: 0000555556589380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.534218][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.540641][ T357] CR2: 000000000000005c CR3: 00000001ddacd000 CR4: 00000000003426a0 [ 24.548472][ T357] Call Trace: [ 24.551596][ T357] ? __die+0xb4/0x100 [ 24.555398][ T357] ? no_context+0xbda/0xe50 [ 24.559746][ T357] ? is_prefetch+0x4b0/0x4b0 [ 24.564160][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 24.569543][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 24.574318][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 24.579870][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 24.585166][ T357] ? page_fault+0x2f/0x40 [ 24.589334][ T357] ? irq_entries_start+0x38/0x660 [ 24.594200][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 24.599488][ T357] ? check_preemption_disabled+0x91/0x320 [ 24.605045][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 24.611291][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 24.617544][ T357] ? irq_entries_start+0x38/0x660 [ 24.622400][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 24.627432][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.632989][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 24.638281][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.643836][ T357] ? _raw_spin_lock+0x1b0/0x1b0 [ 24.648524][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.653733][ T357] ? local_bh_enable+0x20/0x20 [ 24.658331][ T357] ? internal_add_timer+0x34b/0x430 [ 24.663366][ T357] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 24.669007][ T357] ? __mod_timer+0x72b/0x13e0 [ 24.673523][ T357] ? mod_timer_pending+0x20/0x20 [ 24.678296][ T357] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 24.683587][ T357] ? read_msr+0x40/0x40 [ 24.687583][ T357] ? kvm_arch_vcpu_put+0x352/0x580 [ 24.692531][ T357] ? __fd_install+0x119/0x230 [ 24.697043][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.702604][ T357] ? update_load_avg+0x40f/0x1210 [ 24.707459][ T357] ? sched_clock_cpu+0x18/0x3a0 [ 24.712148][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.717701][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.722912][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 24.727944][ T357] ? try_to_wake_up+0x7c5/0x14f0 [ 24.732715][ T357] ? read_msr+0x40/0x40 [ 24.736709][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.742273][ T357] ? check_preemption_disabled+0x9f/0x320 [ 24.748002][ T357] ? debug_smp_processor_id+0x20/0x20 [ 24.753201][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.758757][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.763448][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.768141][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.773076][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.778459][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.783662][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 24.788870][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 24.793993][ T357] ? ptrace_stop+0x6ee/0xa30 [ 24.798418][ T357] ? create_vcpu_fd+0x120/0x120 [ 24.803110][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 24.807713][ T357] ? ioctl_preallocate+0x250/0x250 [ 24.812654][ T357] ? check_preemption_disabled+0x153/0x320 [ 24.818310][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.823419][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 24.828014][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.832963][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.837913][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.842596][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.847107][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.853093][ T357] Modules linked in: [ 24.856847][ T357] CR2: 0000000000000086 [ 24.860831][ T357] ---[ end trace a9aa649ad867d663 ]--- [ 24.866127][ T357] RIP: 0010:0x86 [ 24.869501][ T357] Code: Bad RIP value. [ 24.873402][ T357] RSP: 0018:ffff8881dbc3f308 EFLAGS: 00010086 [ 24.879306][ T357] RAX: ffff8881dbc3f338 RBX: dffffc0000000000 RCX: ffff8881e0d09f80 [ 24.887124][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.894934][ T357] RBP: 0000000000000270 R08: ffffffff82316361 R09: ffffffff811c9085 [ 24.902740][ T357] R10: ffff8881e0d09f80 R11: 0000000000000002 R12: ffffffff84600228 [ 24.910561][ T357] R13: fffffe0000000278 R14: ffff8881dbd10000 R15: fffffe000000027b [ 24.918364][ T357] FS: 0000555556589380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.927130][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.933564][ T357] CR2: 000000000000005c CR3: 00000001ddacd000 CR4: 00000000003426a0 [ 24.941368][ T357] Kernel panic - not syncing: Fatal exception [ 24.947467][ T357] Kernel Offset: disabled [ 24.951587][ T357] Rebooting in 86400 seconds..