./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor214606231 <...> Warning: Permanently added '10.128.0.15' (ED25519) to the list of known hosts. execve("./syz-executor214606231", ["./syz-executor214606231"], 0x7ffc1150b210 /* 10 vars */) = 0 brk(NULL) = 0x555555b98000 brk(0x555555b98d00) = 0x555555b98d00 arch_prctl(ARCH_SET_FS, 0x555555b98380) = 0 set_tid_address(0x555555b98650) = 356 set_robust_list(0x555555b98660, 24) = 0 rseq(0x555555b98ca0, 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-executor214606231", 4096) = 27 getrandom("\x2b\x0b\x81\x00\xa2\x21\x85\x95", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555b98d00 brk(0x555555bb9d00) = 0x555555bb9d00 brk(0x555555bba000) = 0x555555bba000 mprotect(0x7f393c222000, 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=0x555555b98650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555555b98660, 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] write(1, "executing program\n", 18executing program ) = 18 [pid 357] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 23.502144][ T23] audit: type=1400 audit(1715972568.259:66): avc: denied { execmem } for pid=356 comm="syz-executor214" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.515180][ 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. [pid 357] ioctl(3, KVM_CREATE_VM, 0) = 4 [ 23.521344][ T23] audit: type=1400 audit(1715972568.269:67): avc: denied { read } for pid=357 comm="syz-executor214" name="kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.521360][ T23] audit: type=1400 audit(1715972568.269:68): avc: denied { open } for pid=357 comm="syz-executor214" path="/dev/kvm" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 357] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [pid 357] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 23.583409][ T23] audit: type=1400 audit(1715972568.269:69): avc: denied { ioctl } for pid=357 comm="syz-executor214" path="/dev/kvm" dev="devtmpfs" ino=116 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.623757][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.631357][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.637689][ T357] #PF: error_code(0x0010) - not-present page [ 23.643505][ T357] PGD 1e286f067 P4D 1e286f067 PUD 1e06c8067 PMD 0 [ 23.649842][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.654878][ T357] CPU: 1 PID: 357 Comm: syz-executor214 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0 [ 23.664856][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.674769][ T357] RIP: 0010:0x86 [ 23.678155][ T357] Code: Bad RIP value. [ 23.682041][ T357] RSP: 0018:ffff8881dde37308 EFLAGS: 00010086 [ 23.688137][ T357] RAX: ffff8881dde37338 RBX: dffffc0000000000 RCX: ffff8881dc4d4ec0 [ 23.695950][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.703760][ T357] RBP: 0000000000000ec0 R08: ffffffff82316361 R09: ffffffff811c9085 [ 23.711570][ T357] R10: ffff8881dc4d4ec0 R11: 0000000000000002 R12: ffffffff84601550 [ 23.719391][ T357] R13: fffffe0000000ec8 R14: ffff8881db4a0000 R15: fffffe0000000ecb [ 23.727196][ T357] FS: 0000555555b98380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.735961][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.742383][ T357] CR2: 000000000000005c CR3: 00000001ddcd0000 CR4: 00000000003426a0 [ 23.750196][ T357] Call Trace: [ 23.753330][ T357] ? __die+0xb4/0x100 [ 23.757141][ T357] ? no_context+0xbda/0xe50 [ 23.761484][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.765905][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.771286][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 23.776062][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.781617][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.786910][ T357] ? page_fault+0x2f/0x40 [ 23.791076][ T357] ? __entry_text_end+0x4/0x4 [ 23.795592][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.800884][ T357] ? check_preemption_disabled+0x91/0x320 [ 23.806537][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.812795][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.819024][ T357] ? __entry_text_end+0x4/0x4 [ 23.823574][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.828573][ T357] ? update_rq_clock+0x67/0x350 [ 23.833259][ T357] ? __free_pages_ok+0x847/0x950 [ 23.838034][ T357] ? local_bh_enable+0x20/0x20 [ 23.842636][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.848187][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.853397][ T357] ? llist_add_batch+0x91/0xb0 [ 23.857998][ T357] ? generic_exec_single+0x280/0x3e0 [ 23.863123][ T357] ? smp_call_function_single+0x4a0/0x4a0 [ 23.868673][ T357] ? smp_call_function_single+0x388/0x4a0 [ 23.874226][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 23.879003][ T357] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 23.885965][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.891509][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 23.896275][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.901483][ T357] ? get_cpu_entry_area+0x8/0x30 [ 23.906255][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.911288][ T357] ? read_msr+0x40/0x40 [ 23.915281][ T357] ? update_rq_clock+0x67/0x350 [ 23.919968][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.925521][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.930731][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.936286][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.940970][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.945657][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.950605][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.955987][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.961193][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.966401][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 23.971524][ T357] ? ptrace_stop+0x6ee/0xa30 [ 23.975952][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.980638][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 23.985238][ T357] ? ioctl_preallocate+0x250/0x250 [ 23.990185][ T357] ? check_preemption_disabled+0x153/0x320 [ 23.995825][ T357] ? syscall_trace_enter+0x650/0x940 [ 24.000947][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 24.005545][ T357] ? switch_fpu_return+0x1d4/0x410 [ 24.010494][ T357] ? security_file_ioctl+0x7d/0xa0 [ 24.015440][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 24.020127][ T357] ? do_syscall_64+0xca/0x1c0 [ 24.024642][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.030538][ T357] Modules linked in: [ 24.034282][ T357] CR2: 0000000000000086 [ 24.038275][ T357] ---[ end trace dd7606b2f85d6487 ]--- [ 24.043564][ T357] RIP: 0010:0x86 [ 24.046946][ T357] Code: Bad RIP value. [ 24.051286][ T357] RSP: 0018:ffff8881dde37308 EFLAGS: 00010086 [ 24.057185][ T357] RAX: ffff8881dde37338 RBX: dffffc0000000000 RCX: ffff8881dc4d4ec0 [ 24.064995][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.072814][ T357] RBP: 0000000000000ec0 R08: ffffffff82316361 R09: ffffffff811c9085 [ 24.080631][ T357] R10: ffff8881dc4d4ec0 R11: 0000000000000002 R12: ffffffff84601550 [ 24.088441][ T357] R13: fffffe0000000ec8 R14: ffff8881db4a0000 R15: fffffe0000000ecb [ 24.096244][ T357] FS: 0000555555b98380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.105011][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.111432][ T357] CR2: 000000000000005c CR3: 00000001ddcd0000 CR4: 00000000003426a0 [ 24.119505][ T357] Kernel panic - not syncing: Fatal exception [ 24.125585][ T357] Kernel Offset: disabled [ 24.129702][ T357] Rebooting in 86400 seconds..