./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2647248786 <...> Warning: Permanently added '10.128.0.115' (ED25519) to the list of known hosts. execve("./syz-executor2647248786", ["./syz-executor2647248786"], 0x7ffd5ae71090 /* 10 vars */) = 0 brk(NULL) = 0x555556a2a000 brk(0x555556a2ad00) = 0x555556a2ad00 arch_prctl(ARCH_SET_FS, 0x555556a2a380) = 0 set_tid_address(0x555556a2a650) = 356 set_robust_list(0x555556a2a660, 24) = 0 rseq(0x555556a2aca0, 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-executor2647248786", 4096) = 28 getrandom("\xd6\xfb\x97\x78\x04\x93\xb7\x59", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556a2ad00 brk(0x555556a4bd00) = 0x555556a4bd00 brk(0x555556a4c000) = 0x555556a4c000 mprotect(0x7f4f66f3c000, 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=0x555556a2a650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555556a2a660, 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 [ 23.289525][ T23] audit: type=1400 audit(1714908598.570:66): avc: denied { execmem } for pid=356 comm="syz-executor264" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.312200][ T23] audit: type=1400 audit(1714908598.590:67): avc: denied { read } for pid=357 comm="syz-executor264" name="kvm" dev="devtmpfs" ino=93 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.328422][ 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. [ 23.335557][ T23] audit: type=1400 audit(1714908598.590:68): avc: denied { open } for pid=357 comm="syz-executor264" path="/dev/kvm" dev="devtmpfs" ino=93 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] dup(4) = 5 [pid 357] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 357] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_LOG_DIRTY_PAGES|KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 23.373750][ T23] audit: type=1400 audit(1714908598.610:69): avc: denied { ioctl } for pid=357 comm="syz-executor264" path="/dev/kvm" dev="devtmpfs" ino=93 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.426003][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.434228][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.440564][ T357] #PF: error_code(0x0010) - not-present page [ 23.446376][ T357] PGD 1dc5f4067 P4D 1dc5f4067 PUD 1dc77f067 PMD 0 [ 23.452720][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.457831][ T357] CPU: 0 PID: 357 Comm: syz-executor264 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0 [ 23.467806][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.477726][ T357] RIP: 0010:0x86 [ 23.481115][ T357] Code: Bad RIP value. [ 23.485163][ T357] RSP: 0018:ffff8881dc087308 EFLAGS: 00010086 [ 23.491076][ T357] RAX: ffff8881dc087338 RBX: dffffc0000000000 RCX: ffff8881dc656e40 [ 23.498878][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.506778][ T357] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 23.514591][ T357] R10: ffff8881dc656e40 R11: 0000000000000002 R12: ffffffff84600238 [ 23.522405][ T357] R13: fffffe0000000298 R14: ffff8881dc108000 R15: fffffe000000029b [ 23.530224][ T357] FS: 0000555556a2a380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.538979][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.545398][ T357] CR2: 000000000000005c CR3: 00000001dce20000 CR4: 00000000003426b0 [ 23.553298][ T357] Call Trace: [ 23.556440][ T357] ? __die+0xb4/0x100 [ 23.560420][ T357] ? no_context+0xbda/0xe50 [ 23.564760][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.569192][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.574692][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 23.579434][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.584978][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.590450][ T357] ? page_fault+0x2f/0x40 [ 23.594611][ T357] ? irq_entries_start+0x48/0x660 [ 23.599477][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.604768][ T357] ? check_preemption_disabled+0x91/0x320 [ 23.610324][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.616572][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.622821][ T357] ? irq_entries_start+0x48/0x660 [ 23.627684][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.632716][ T357] ? find_next_and_bit+0x156/0x190 [ 23.637663][ T357] ? load_balance+0x43e1/0x7a40 [ 23.642349][ T357] ? __free_pages_ok+0x847/0x950 [ 23.647123][ T357] ? local_bh_enable+0x20/0x20 [ 23.651729][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.657281][ T357] ? update_blocked_averages+0xd50/0xd50 [ 23.662748][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.667780][ T357] ? read_msr+0x40/0x40 [ 23.671771][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.677328][ T357] ? kvm_sched_clock_read+0x14/0x40 [ 23.682360][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.687918][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.693128][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.698683][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.703365][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.708056][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.712998][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.718381][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.723586][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.728795][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 23.733918][ T357] ? ptrace_stop+0x6ee/0xa30 [ 23.738344][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.743032][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 23.747631][ T357] ? ioctl_preallocate+0x250/0x250 [ 23.752585][ T357] ? check_preemption_disabled+0x153/0x320 [ 23.758218][ T357] ? syscall_trace_enter+0x650/0x940 [ 23.763339][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 23.767942][ T357] ? switch_fpu_return+0x1d4/0x410 [ 23.772888][ T357] ? security_file_ioctl+0x7d/0xa0 [ 23.777836][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 23.782523][ T357] ? do_syscall_64+0xca/0x1c0 [ 23.787037][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.793020][ T357] Modules linked in: [ 23.796766][ T357] CR2: 0000000000000086 [ 23.800755][ T357] ---[ end trace 98f33971e963eac9 ]--- [ 23.806048][ T357] RIP: 0010:0x86 [ 23.809431][ T357] Code: Bad RIP value. [ 23.813330][ T357] RSP: 0018:ffff8881dc087308 EFLAGS: 00010086 [ 23.819233][ T357] RAX: ffff8881dc087338 RBX: dffffc0000000000 RCX: ffff8881dc656e40 [ 23.827044][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.834861][ T357] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 23.842666][ T357] R10: ffff8881dc656e40 R11: 0000000000000002 R12: ffffffff84600238 [ 23.850738][ T357] R13: fffffe0000000298 R14: ffff8881dc108000 R15: fffffe000000029b [ 23.858550][ T357] FS: 0000555556a2a380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 23.867320][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.873737][ T357] CR2: 000000000000005c CR3: 00000001dce20000 CR4: 00000000003426b0 [ 23.881553][ T357] Kernel panic - not syncing: Fatal exception [ 23.887639][ T357] Kernel Offset: disabled [ 23.891868][ T357] Rebooting in 86400 seconds..