./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3976792265 <...> Warning: Permanently added '10.128.1.79' (ED25519) to the list of known hosts. execve("./syz-executor3976792265", ["./syz-executor3976792265"], 0x7ffd457ce660 /* 10 vars */) = 0 brk(NULL) = 0x555556e97000 brk(0x555556e97d00) = 0x555556e97d00 arch_prctl(ARCH_SET_FS, 0x555556e97380) = 0 set_tid_address(0x555556e97650) = 357 set_robust_list(0x555556e97660, 24) = 0 rseq(0x555556e97ca0, 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-executor3976792265", 4096) = 28 getrandom("\xf4\xd7\x71\xae\x75\xe7\xae\x4d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556e97d00 brk(0x555556eb8d00) = 0x555556eb8d00 brk(0x555556eb9000) = 0x555556eb9000 mprotect(0x7f07cc44b000, 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=0x555556e97650) = 358 ./strace-static-x86_64: Process 358 attached [pid 358] set_robust_list(0x555556e97660, 24) = 0 [pid 358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 358] setpgid(0, 0) = 0 [pid 358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 358] write(3, "1000", 4) = 4 [pid 358] close(3) = 0 [pid 358] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 24.444524][ T23] audit: type=1400 audit(1715211150.960:66): avc: denied { execmem } for pid=357 comm="syz-executor397" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.454462][ T358] 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 358] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 358] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [ 24.464557][ T23] audit: type=1400 audit(1715211150.970:67): avc: denied { read } for pid=358 comm="syz-executor397" name="kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.502402][ T23] audit: type=1400 audit(1715211150.970:68): avc: denied { open } for pid=358 comm="syz-executor397" path="/dev/kvm" dev="devtmpfs" ino=104 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 358] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 24.525977][ T23] audit: type=1400 audit(1715211150.970:69): avc: denied { ioctl } for pid=358 comm="syz-executor397" path="/dev/kvm" dev="devtmpfs" ino=104 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.559194][ T358] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.566829][ T358] #PF: supervisor instruction fetch in kernel mode [ 24.573159][ T358] #PF: error_code(0x0010) - not-present page [ 24.578952][ T358] PGD 1de82d067 P4D 1de82d067 PUD 1dbb28067 PMD 0 [ 24.585288][ T358] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.590352][ T358] CPU: 0 PID: 358 Comm: syz-executor397 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0 [ 24.600305][ T358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 24.610216][ T358] RIP: 0010:0x86 [ 24.613588][ T358] Code: Bad RIP value. [ 24.617486][ T358] RSP: 0018:ffff8881db437308 EFLAGS: 00010086 [ 24.623391][ T358] RAX: ffff8881db437338 RBX: dffffc0000000000 RCX: ffff8881dbb50000 [ 24.631203][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.639117][ T358] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 24.647449][ T358] R10: ffff8881dbb50000 R11: 0000000000000002 R12: ffffffff84600238 [ 24.655262][ T358] R13: fffffe0000000298 R14: ffff8881db460000 R15: fffffe000000029b [ 24.663076][ T358] FS: 0000555556e97380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 24.671839][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.678258][ T358] CR2: 000000000000005c CR3: 00000001ddcab000 CR4: 00000000003426b0 [ 24.686069][ T358] Call Trace: [ 24.689319][ T358] ? __die+0xb4/0x100 [ 24.693105][ T358] ? no_context+0xbda/0xe50 [ 24.697510][ T358] ? is_prefetch+0x4b0/0x4b0 [ 24.701871][ T358] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 24.707255][ T358] ? __do_page_fault+0xa7d/0xbb0 [ 24.712035][ T358] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 24.717579][ T358] ? __bad_area_nosemaphore+0xc0/0x460 [ 24.722911][ T358] ? page_fault+0x2f/0x40 [ 24.727037][ T358] ? irq_entries_start+0x48/0x660 [ 24.731904][ T358] ? vmx_handle_exit_irqoff+0x45/0x220 [ 24.737193][ T358] ? check_preemption_disabled+0x91/0x320 [ 24.742754][ T358] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 24.749000][ T358] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 24.755335][ T358] ? irq_entries_start+0x48/0x660 [ 24.760197][ T358] ? vcpu_enter_guest+0x2d06/0x9f70 [ 24.765233][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.770786][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 24.776077][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.781631][ T358] ? _raw_spin_lock+0x1b0/0x1b0 [ 24.786319][ T358] ? debug_smp_processor_id+0x20/0x20 [ 24.791532][ T358] ? local_bh_enable+0x20/0x20 [ 24.796126][ T358] ? internal_add_timer+0x34b/0x430 [ 24.801252][ T358] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 24.807236][ T358] ? __mod_timer+0x72b/0x13e0 [ 24.811751][ T358] ? mod_timer_pending+0x20/0x20 [ 24.816531][ T358] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 24.821828][ T358] ? read_msr+0x40/0x40 [ 24.825918][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.831479][ T358] ? __fd_install+0x119/0x230 [ 24.835969][ T358] ? update_load_avg+0x40f/0x1210 [ 24.840828][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.846426][ T358] ? debug_smp_processor_id+0x20/0x20 [ 24.851693][ T358] ? resched_curr+0x9b/0x200 [ 24.856106][ T358] ? check_preempt_wakeup+0x4f6/0x9f0 [ 24.861313][ T358] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 24.866345][ T358] ? try_to_wake_up+0x7c5/0x14f0 [ 24.871116][ T358] ? read_msr+0x40/0x40 [ 24.875108][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.880666][ T358] ? check_preemption_disabled+0x9f/0x320 [ 24.886216][ T358] ? debug_smp_processor_id+0x20/0x20 [ 24.891681][ T358] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.897318][ T358] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.901994][ T358] ? create_vcpu_fd+0x120/0x120 [ 24.906678][ T358] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.911629][ T358] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.917097][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 24.922302][ T358] ? cgroup_update_frozen+0x157/0xab0 [ 24.927509][ T358] ? cgroup_leave_frozen+0x13c/0x290 [ 24.932720][ T358] ? ptrace_stop+0x6ee/0xa30 [ 24.937143][ T358] ? create_vcpu_fd+0x120/0x120 [ 24.941837][ T358] ? do_vfs_ioctl+0x742/0x1720 [ 24.946429][ T358] ? ioctl_preallocate+0x250/0x250 [ 24.951382][ T358] ? check_preemption_disabled+0x153/0x320 [ 24.957017][ T358] ? syscall_trace_enter+0x650/0x940 [ 24.962138][ T358] ? do_syscall_64+0x1c0/0x1c0 [ 24.966741][ T358] ? switch_fpu_return+0x1d4/0x410 [ 24.971687][ T358] ? security_file_ioctl+0x7d/0xa0 [ 24.976635][ T358] ? __x64_sys_ioctl+0xd4/0x110 [ 24.981318][ T358] ? do_syscall_64+0xca/0x1c0 [ 24.985830][ T358] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.991729][ T358] Modules linked in: [ 24.995473][ T358] CR2: 0000000000000086 [ 24.999460][ T358] ---[ end trace 38f16ab423cfa5fb ]--- [ 25.004753][ T358] RIP: 0010:0x86 [ 25.008146][ T358] Code: Bad RIP value. [ 25.012037][ T358] RSP: 0018:ffff8881db437308 EFLAGS: 00010086 [ 25.017951][ T358] RAX: ffff8881db437338 RBX: dffffc0000000000 RCX: ffff8881dbb50000 [ 25.025757][ T358] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.033566][ T358] RBP: 0000000000000290 R08: ffffffff82316361 R09: ffffffff811c9085 [ 25.041376][ T358] R10: ffff8881dbb50000 R11: 0000000000000002 R12: ffffffff84600238 [ 25.049186][ T358] R13: fffffe0000000298 R14: ffff8881db460000 R15: fffffe000000029b [ 25.057000][ T358] FS: 0000555556e97380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.065765][ T358] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.072185][ T358] CR2: 000000000000005c CR3: 00000001ddcab000 CR4: 00000000003426b0 [ 25.079998][ T358] Kernel panic - not syncing: Fatal exception [ 25.086172][ T358] Kernel Offset: disabled [ 25.090294][ T358] Rebooting in 86400 seconds..