./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2061590929 <...> Warning: Permanently added '10.128.1.164' (ED25519) to the list of known hosts. execve("./syz-executor2061590929", ["./syz-executor2061590929"], 0x7fffda570370 /* 10 vars */) = 0 brk(NULL) = 0x55555624e000 brk(0x55555624ed00) = 0x55555624ed00 arch_prctl(ARCH_SET_FS, 0x55555624e380) = 0 set_tid_address(0x55555624e650) = 355 set_robust_list(0x55555624e660, 24) = 0 rseq(0x55555624eca0, 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-executor2061590929", 4096) = 28 getrandom("\x3b\x3b\x25\x44\x1e\x0b\xab\x15", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555624ed00 brk(0x55555626fd00) = 0x55555626fd00 brk(0x555556270000) = 0x555556270000 mprotect(0x7f117c335000, 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 mkdir("./syzkaller.5Gruik", 0700) = 0 chmod("./syzkaller.5Gruik", 0777) = 0 chdir("./syzkaller.5Gruik") = 0 mkdir("./0", 0777) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555624e650) = 356 ./strace-static-x86_64: Process 356 attached [pid 356] set_robust_list(0x55555624e660, 24) = 0 [pid 356] chdir("./0") = 0 [pid 356] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 356] setpgid(0, 0) = 0 [pid 356] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 356] write(3, "1000", 4) = 4 [pid 356] close(3) = 0 [pid 356] symlink("/dev/binderfs", "./binderfs") = 0 [pid 356] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 22.169183][ T23] audit: type=1400 audit(1714530238.660:66): avc: denied { execmem } for pid=355 comm="syz-executor206" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.194765][ T23] audit: type=1400 audit(1714530238.680:67): avc: denied { read } for pid=356 comm="syz-executor206" name="kvm" dev="devtmpfs" ino=110 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.207959][ T356] 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. [ 22.217939][ T23] audit: type=1400 audit(1714530238.680:68): avc: denied { open } for pid=356 comm="syz-executor206" path="/dev/kvm" dev="devtmpfs" ino=110 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 356] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 356] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [pid 356] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 22.257903][ T23] audit: type=1400 audit(1714530238.700:69): avc: denied { ioctl } for pid=356 comm="syz-executor206" path="/dev/kvm" dev="devtmpfs" ino=110 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 22.316355][ T356] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 22.324061][ T356] #PF: supervisor instruction fetch in kernel mode [ 22.330384][ T356] #PF: error_code(0x0010) - not-present page [ 22.336206][ T356] PGD 1dbdd6067 P4D 1dbdd6067 PUD 1dbdd5067 PMD 0 [ 22.342542][ T356] Oops: 0010 [#1] PREEMPT SMP KASAN [ 22.347661][ T356] CPU: 0 PID: 356 Comm: syz-executor206 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 22.357726][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 22.367730][ T356] RIP: 0010:0x86 [ 22.371096][ T356] Code: Bad RIP value. [ 22.375259][ T356] RSP: 0018:ffff8881e2947308 EFLAGS: 00010086 [ 22.382164][ T356] RAX: ffff8881e2947338 RBX: dffffc0000000000 RCX: ffff8881dc6ecec0 [ 22.396452][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.410490][ T356] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.418291][ T356] R10: ffff8881dc6ecec0 R11: 0000000000000002 R12: ffffffff84600238 [ 22.426462][ T356] R13: fffffe0000000298 R14: ffff8881e0f00000 R15: fffffe000000029b [ 22.434276][ T356] FS: 000055555624e380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 22.443046][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.449466][ T356] CR2: 000000000000005c CR3: 00000001dbdef000 CR4: 00000000003426b0 [ 22.457274][ T356] Call Trace: [ 22.460408][ T356] ? __die+0xb4/0x100 [ 22.464225][ T356] ? no_context+0xbda/0xe50 [ 22.468564][ T356] ? is_prefetch+0x4b0/0x4b0 [ 22.472995][ T356] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 22.478387][ T356] ? __do_page_fault+0xa7d/0xbb0 [ 22.483146][ T356] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 22.488706][ T356] ? __bad_area_nosemaphore+0xc0/0x460 [ 22.493993][ T356] ? page_fault+0x2f/0x40 [ 22.498167][ T356] ? irq_entries_start+0x48/0x660 [ 22.503040][ T356] ? vmx_handle_exit_irqoff+0x45/0x220 [ 22.508525][ T356] ? check_preemption_disabled+0x91/0x320 [ 22.515105][ T356] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 22.522042][ T356] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 22.528303][ T356] ? irq_entries_start+0x48/0x660 [ 22.533235][ T356] ? vcpu_enter_guest+0x2d06/0x9f70 [ 22.538271][ T356] ? find_next_and_bit+0x156/0x190 [ 22.543489][ T356] ? load_balance+0x43e1/0x7a40 [ 22.548164][ T356] ? local_bh_enable+0x20/0x20 [ 22.552768][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.558331][ T356] ? update_blocked_averages+0xd50/0xd50 [ 22.563788][ T356] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 22.568827][ T356] ? read_msr+0x40/0x40 [ 22.572811][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.578368][ T356] ? kvm_sched_clock_read+0x14/0x40 [ 22.583406][ T356] ? check_preemption_disabled+0x9f/0x320 [ 22.588954][ T356] ? debug_smp_processor_id+0x20/0x20 [ 22.594163][ T356] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 22.599722][ T356] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 22.604408][ T356] ? create_vcpu_fd+0x120/0x120 [ 22.609091][ T356] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 22.614037][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.619421][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 22.624627][ T356] ? cgroup_update_frozen+0x157/0xab0 [ 22.629840][ T356] ? cgroup_leave_frozen+0x13c/0x290 [ 22.635041][ T356] ? ptrace_stop+0x6ee/0xa30 [ 22.639472][ T356] ? create_vcpu_fd+0x120/0x120 [ 22.644158][ T356] ? do_vfs_ioctl+0x742/0x1720 [ 22.648757][ T356] ? ioctl_preallocate+0x250/0x250 [ 22.653705][ T356] ? check_preemption_disabled+0x153/0x320 [ 22.659346][ T356] ? syscall_trace_enter+0x650/0x940 [ 22.664466][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 22.669064][ T356] ? switch_fpu_return+0x1d4/0x410 [ 22.674014][ T356] ? security_file_ioctl+0x7d/0xa0 [ 22.678966][ T356] ? __x64_sys_ioctl+0xd4/0x110 [ 22.683653][ T356] ? do_syscall_64+0xca/0x1c0 [ 22.688160][ T356] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 22.694071][ T356] Modules linked in: [ 22.697891][ T356] CR2: 0000000000000086 [ 22.701965][ T356] ---[ end trace a35604616e65d83d ]--- [ 22.707260][ T356] RIP: 0010:0x86 [ 22.710642][ T356] Code: Bad RIP value. [ 22.714542][ T356] RSP: 0018:ffff8881e2947308 EFLAGS: 00010086 [ 22.720445][ T356] RAX: ffff8881e2947338 RBX: dffffc0000000000 RCX: ffff8881dc6ecec0 [ 22.728256][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 22.736156][ T356] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 22.743967][ T356] R10: ffff8881dc6ecec0 R11: 0000000000000002 R12: ffffffff84600238 [ 22.751779][ T356] R13: fffffe0000000298 R14: ffff8881e0f00000 R15: fffffe000000029b [ 22.759592][ T356] FS: 000055555624e380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 22.768368][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.774777][ T356] CR2: 000000000000005c CR3: 00000001dbdef000 CR4: 00000000003426b0 [ 22.782592][ T356] Kernel panic - not syncing: Fatal exception [ 22.788689][ T356] Kernel Offset: disabled [ 22.792805][ T356] Rebooting in 86400 seconds..