./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2418929399 <...> Warning: Permanently added '10.128.0.35' (ED25519) to the list of known hosts. execve("./syz-executor2418929399", ["./syz-executor2418929399"], 0x7ffd52e851f0 /* 10 vars */) = 0 brk(NULL) = 0x555556821000 brk(0x555556821d00) = 0x555556821d00 arch_prctl(ARCH_SET_FS, 0x555556821380) = 0 set_tid_address(0x555556821650) = 359 set_robust_list(0x555556821660, 24) = 0 rseq(0x555556821ca0, 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-executor2418929399", 4096) = 28 getrandom("\xfd\x3e\x8c\x21\x90\x23\xf2\x69", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556821d00 brk(0x555556842d00) = 0x555556842d00 brk(0x555556843000) = 0x555556843000 mprotect(0x7fb2cf6c7000, 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=0x555556821650) = 360 ./strace-static-x86_64: Process 360 attached [pid 360] set_robust_list(0x555556821660, 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 [ 32.104743][ T23] audit: type=1400 audit(1713488526.550:66): avc: denied { execmem } for pid=359 comm="syz-executor241" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [pid 360] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 32.132346][ T23] audit: type=1400 audit(1713488526.580:67): avc: denied { read } for pid=360 comm="syz-executor241" 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 [ 32.155550][ T23] audit: type=1400 audit(1713488526.580:68): avc: denied { open } for pid=360 comm="syz-executor241" 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 [ 32.171611][ 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] dup(4) = 5 [pid 360] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 360] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 32.178906][ T23] audit: type=1400 audit(1713488526.620:69): avc: denied { ioctl } for pid=360 comm="syz-executor241" 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 [ 32.248535][ T360] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 32.256167][ T360] #PF: supervisor instruction fetch in kernel mode [ 32.262642][ T360] #PF: error_code(0x0010) - not-present page [ 32.268454][ T360] PGD 1e2d60067 P4D 1e2d60067 PUD 1e2d61067 PMD 0 [ 32.274802][ T360] Oops: 0010 [#1] PREEMPT SMP KASAN [ 32.279838][ T360] CPU: 1 PID: 360 Comm: syz-executor241 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 32.289823][ T360] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 32.299755][ T360] RIP: 0010:0x86 [ 32.303092][ T360] Code: Bad RIP value. [ 32.306997][ T360] RSP: 0018:ffff8881db9df308 EFLAGS: 00010086 [ 32.312905][ T360] RAX: ffff8881db9df338 RBX: dffffc0000000000 RCX: ffff8881e0630fc0 [ 32.320716][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 32.328541][ T360] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 32.336359][ T360] R10: ffff8881e0630fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 32.344159][ T360] R13: fffffe0000000fd8 R14: ffff8881dba80000 R15: fffffe0000000fdb [ 32.351968][ T360] FS: 0000555556821380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 32.360732][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.367166][ T360] CR2: 000000000000005c CR3: 00000001e2dc4000 CR4: 00000000003426a0 [ 32.374958][ T360] Call Trace: [ 32.378162][ T360] ? __die+0xb4/0x100 [ 32.381924][ T360] ? no_context+0xbda/0xe50 [ 32.386275][ T360] ? is_prefetch+0x4b0/0x4b0 [ 32.390680][ T360] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 32.396068][ T360] ? __do_page_fault+0xa7d/0xbb0 [ 32.400861][ T360] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 32.406401][ T360] ? __bad_area_nosemaphore+0xc0/0x460 [ 32.411713][ T360] ? page_fault+0x2f/0x40 [ 32.415969][ T360] ? call_function_interrupt+0x20/0x20 [ 32.421242][ T360] ? vmx_handle_exit_irqoff+0x45/0x220 [ 32.426545][ T360] ? check_preemption_disabled+0x91/0x320 [ 32.432097][ T360] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 32.438358][ T360] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 32.444588][ T360] ? call_function_interrupt+0x20/0x20 [ 32.449885][ T360] ? vcpu_enter_guest+0x2d06/0x9f70 [ 32.454918][ T360] ? check_preemption_disabled+0x9f/0x320 [ 32.460497][ T360] ? debug_smp_processor_id+0x20/0x20 [ 32.465679][ T360] ? __free_pages_ok+0x847/0x950 [ 32.470451][ T360] ? __kvm_set_memory_region+0xda6/0xf60 [ 32.475942][ T360] ? kvm_vm_ioctl_set_memory_region+0x67/0x90 [ 32.481823][ T360] ? do_vfs_ioctl+0x742/0x1720 [ 32.486422][ T360] ? __x64_sys_ioctl+0xd4/0x110 [ 32.491112][ T360] ? do_syscall_64+0xca/0x1c0 [ 32.495623][ T360] ? local_bh_enable+0x20/0x20 [ 32.500252][ T360] ? __free_one_page+0x7f3/0xa60 [ 32.505002][ T360] ? _raw_spin_unlock+0x49/0x60 [ 32.509720][ T360] ? set_pageblock_migratetype+0x150/0x150 [ 32.515332][ T360] ? kvm_mmu_change_mmu_pages+0x2dc/0x320 [ 32.520886][ T360] ? check_preemption_disabled+0x9f/0x320 [ 32.526444][ T360] ? update_load_avg+0x40f/0x1210 [ 32.531299][ T360] ? check_preemption_disabled+0x9f/0x320 [ 32.536858][ T360] ? debug_smp_processor_id+0x20/0x20 [ 32.542073][ T360] ? resched_curr+0x9b/0x200 [ 32.546493][ T360] ? check_preempt_wakeup+0x4f6/0x9f0 [ 32.551701][ T360] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 32.556734][ T360] ? try_to_wake_up+0x7c5/0x14f0 [ 32.561509][ T360] ? read_msr+0x40/0x40 [ 32.565528][ T360] ? check_preemption_disabled+0x9f/0x320 [ 32.571063][ T360] ? check_preemption_disabled+0x9f/0x320 [ 32.576761][ T360] ? debug_smp_processor_id+0x20/0x20 [ 32.581947][ T360] ? kvm_check_async_pf_completion+0x335/0x350 [ 32.587941][ T360] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 32.593502][ T360] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 32.598181][ T360] ? create_vcpu_fd+0x120/0x120 [ 32.602879][ T360] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 32.607879][ T360] ? _raw_spin_lock_irqsave+0x210/0x210 [ 32.613198][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 32.618490][ T360] ? cgroup_update_frozen+0x157/0xab0 [ 32.623697][ T360] ? cgroup_leave_frozen+0x13c/0x290 [ 32.628838][ T360] ? ptrace_stop+0x6ee/0xa30 [ 32.633280][ T360] ? create_vcpu_fd+0x120/0x120 [ 32.637941][ T360] ? do_vfs_ioctl+0x742/0x1720 [ 32.642536][ T360] ? ioctl_preallocate+0x250/0x250 [ 32.647503][ T360] ? check_preemption_disabled+0x153/0x320 [ 32.653126][ T360] ? syscall_trace_enter+0x650/0x940 [ 32.658256][ T360] ? do_syscall_64+0x1c0/0x1c0 [ 32.662842][ T360] ? switch_fpu_return+0x1d4/0x410 [ 32.667801][ T360] ? security_file_ioctl+0x7d/0xa0 [ 32.672741][ T360] ? __x64_sys_ioctl+0xd4/0x110 [ 32.677426][ T360] ? do_syscall_64+0xca/0x1c0 [ 32.681940][ T360] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 32.688026][ T360] Modules linked in: [ 32.691749][ T360] CR2: 0000000000000086 [ 32.695734][ T360] ---[ end trace 37402f32a8262c3d ]--- [ 32.701109][ T360] RIP: 0010:0x86 [ 32.704407][ T360] Code: Bad RIP value. [ 32.708316][ T360] RSP: 0018:ffff8881db9df308 EFLAGS: 00010086 [ 32.714223][ T360] RAX: ffff8881db9df338 RBX: dffffc0000000000 RCX: ffff8881e0630fc0 [ 32.722030][ T360] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 32.729846][ T360] RBP: 0000000000000fd0 R08: ffffffff82315341 R09: ffffffff811c9085 [ 32.737760][ T360] R10: ffff8881e0630fc0 R11: 0000000000000002 R12: ffffffff846015d0 [ 32.745573][ T360] R13: fffffe0000000fd8 R14: ffff8881dba80000 R15: fffffe0000000fdb [ 32.753375][ T360] FS: 0000555556821380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 32.762132][ T360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.768568][ T360] CR2: 000000000000005c CR3: 00000001e2dc4000 CR4: 00000000003426a0 [ 32.776368][ T360] Kernel panic - not syncing: Fatal exception [ 32.782393][ T360] Kernel Offset: disabled [ 32.786553][ T360] Rebooting in 86400 seconds..