./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1683369793 <...> Warning: Permanently added '10.128.1.140' (ED25519) to the list of known hosts. execve("./syz-executor1683369793", ["./syz-executor1683369793"], 0x7fff757c0c80 /* 10 vars */) = 0 brk(NULL) = 0x555556de8000 brk(0x555556de8d00) = 0x555556de8d00 arch_prctl(ARCH_SET_FS, 0x555556de8380) = 0 set_tid_address(0x555556de8650) = 359 set_robust_list(0x555556de8660, 24) = 0 rseq(0x555556de8ca0, 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-executor1683369793", 4096) = 28 getrandom("\x0b\x56\x0f\xcf\x20\xd0\x85\xb5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556de8d00 brk(0x555556e09d00) = 0x555556e09d00 brk(0x555556e0a000) = 0x555556e0a000 mprotect(0x7fcd1bdd8000, 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 360 attached , child_tidptr=0x555556de8650) = 360 [pid 360] set_robust_list(0x555556de8660, 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 [ 25.818218][ T23] audit: type=1400 audit(1714264828.410:66): avc: denied { execmem } for pid=359 comm="syz-executor168" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.842680][ T23] audit: type=1400 audit(1714264828.430:67): avc: denied { read } for pid=360 comm="syz-executor168" name="kvm" dev="devtmpfs" ino=108 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.865511][ T23] audit: type=1400 audit(1714264828.430:68): avc: denied { open } for pid=360 comm="syz-executor168" path="/dev/kvm" dev="devtmpfs" ino=108 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.878832][ 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. [pid 360] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 360] ioctl(4, KVM_ENABLE_CAP, 0x20000180) = 0 [pid 360] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 25.889137][ T23] audit: type=1400 audit(1714264828.470:69): avc: denied { ioctl } for pid=360 comm="syz-executor168" path="/dev/kvm" dev="devtmpfs" ino=108 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 25.947381][ T360] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 25.954990][ T360] #PF: supervisor instruction fetch in kernel mode [ 25.961321][ T360] #PF: error_code(0x0010) - not-present page [ 25.967140][ T360] PGD 1dd08c067 P4D 1dd08c067 PUD 1dfa54067 PMD 0 [ 25.973469][ T360] Oops: 0010 [#1] PREEMPT SMP KASAN [ 25.978506][ T360] CPU: 1 PID: 360 Comm: syz-executor168 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 25.988573][ T360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 25.998493][ T360] RIP: 0010:0x86 [ 26.001858][ T360] Code: Bad RIP value. [ 26.005867][ T360] RSP: 0018:ffff8881db827308 EFLAGS: 00010086 [ 26.011876][ T360] RAX: ffff8881db827338 RBX: dffffc0000000000 RCX: ffff8881ddfa1f80 [ 26.019686][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.028119][ T360] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 26.036108][ T360] R10: ffff8881ddfa1f80 R11: 0000000000000002 R12: ffffffff84600228 [ 26.043916][ T360] R13: fffffe0000000278 R14: ffff8881db8c0000 R15: fffffe000000027b [ 26.051726][ T360] FS: 0000555556de8380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 26.060479][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.066994][ T360] CR2: 000000000000005c CR3: 00000001dd775000 CR4: 00000000003426a0 [ 26.074804][ T360] Call Trace: [ 26.077943][ T360] ? __die+0xb4/0x100 [ 26.081756][ T360] ? no_context+0xbda/0xe50 [ 26.086096][ T360] ? is_prefetch+0x4b0/0x4b0 [ 26.090519][ T360] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 26.096013][ T360] ? __do_page_fault+0xa7d/0xbb0 [ 26.100793][ T360] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 26.106336][ T360] ? __bad_area_nosemaphore+0xc0/0x460 [ 26.111643][ T360] ? page_fault+0x2f/0x40 [ 26.115931][ T360] ? irq_entries_start+0x38/0x660 [ 26.120775][ T360] ? vmx_handle_exit_irqoff+0x45/0x220 [ 26.126055][ T360] ? check_preemption_disabled+0x91/0x320 [ 26.131620][ T360] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 26.137946][ T360] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 26.144196][ T360] ? irq_entries_start+0x38/0x660 [ 26.149069][ T360] ? vcpu_enter_guest+0x2d06/0x9f70 [ 26.154094][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.159644][ T360] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 26.164954][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.170813][ T360] ? _raw_spin_lock+0x1b0/0x1b0 [ 26.175499][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.180900][ T360] ? local_bh_enable+0x20/0x20 [ 26.185500][ T360] ? internal_add_timer+0x34b/0x430 [ 26.190553][ T360] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 26.196184][ T360] ? __mod_timer+0x72b/0x13e0 [ 26.200715][ T360] ? mod_timer_pending+0x20/0x20 [ 26.205458][ T360] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 26.210759][ T360] ? read_msr+0x40/0x40 [ 26.214748][ T360] ? kvm_arch_vcpu_put+0x352/0x580 [ 26.219788][ T360] ? __fd_install+0x119/0x230 [ 26.224301][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.230684][ T360] ? update_load_avg+0x40f/0x1210 [ 26.235641][ T360] ? sched_clock_cpu+0x18/0x3a0 [ 26.240440][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.246329][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.251646][ T360] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 26.256633][ T360] ? try_to_wake_up+0x7c5/0x14f0 [ 26.261550][ T360] ? read_msr+0x40/0x40 [ 26.265701][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.271391][ T360] ? check_preemption_disabled+0x9f/0x320 [ 26.276946][ T360] ? debug_smp_processor_id+0x20/0x20 [ 26.282148][ T360] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 26.287724][ T360] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 26.292720][ T360] ? create_vcpu_fd+0x120/0x120 [ 26.297408][ T360] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 26.302359][ T360] ? _raw_spin_lock_irqsave+0x210/0x210 [ 26.307734][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 26.313175][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 26.318447][ T360] ? cgroup_leave_frozen+0x13c/0x290 [ 26.323584][ T360] ? ptrace_stop+0x6ee/0xa30 [ 26.327996][ T360] ? create_vcpu_fd+0x120/0x120 [ 26.332684][ T360] ? do_vfs_ioctl+0x742/0x1720 [ 26.337309][ T360] ? ioctl_preallocate+0x250/0x250 [ 26.342354][ T360] ? check_preemption_disabled+0x153/0x320 [ 26.347984][ T360] ? syscall_trace_enter+0x650/0x940 [ 26.353113][ T360] ? do_syscall_64+0x1c0/0x1c0 [ 26.357711][ T360] ? switch_fpu_return+0x1d4/0x410 [ 26.362664][ T360] ? security_file_ioctl+0x7d/0xa0 [ 26.367735][ T360] ? __x64_sys_ioctl+0xd4/0x110 [ 26.372678][ T360] ? do_syscall_64+0xca/0x1c0 [ 26.377190][ T360] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 26.383082][ T360] Modules linked in: [ 26.386840][ T360] CR2: 0000000000000086 [ 26.390815][ T360] ---[ end trace 61f0b5d57ffae0b2 ]--- [ 26.396111][ T360] RIP: 0010:0x86 [ 26.399493][ T360] Code: Bad RIP value. [ 26.403415][ T360] RSP: 0018:ffff8881db827308 EFLAGS: 00010086 [ 26.409295][ T360] RAX: ffff8881db827338 RBX: dffffc0000000000 RCX: ffff8881ddfa1f80 [ 26.417103][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.424930][ T360] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 26.432733][ T360] R10: ffff8881ddfa1f80 R11: 0000000000000002 R12: ffffffff84600228 [ 26.440556][ T360] R13: fffffe0000000278 R14: ffff8881db8c0000 R15: fffffe000000027b [ 26.448916][ T360] FS: 0000555556de8380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 26.458129][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.464671][ T360] CR2: 000000000000005c CR3: 00000001dd775000 CR4: 00000000003426a0 [ 26.472483][ T360] Kernel panic - not syncing: Fatal exception [ 26.478727][ T360] Kernel Offset: disabled [ 26.482957][ T360] Rebooting in 86400 seconds..