./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor197059266 <...> Warning: Permanently added '10.128.1.52' (ED25519) to the list of known hosts. execve("./syz-executor197059266", ["./syz-executor197059266"], 0x7ffef9282be0 /* 10 vars */) = 0 brk(NULL) = 0x555556aa7000 brk(0x555556aa7d00) = 0x555556aa7d00 arch_prctl(ARCH_SET_FS, 0x555556aa7380) = 0 set_tid_address(0x555556aa7650) = 356 set_robust_list(0x555556aa7660, 24) = 0 rseq(0x555556aa7ca0, 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-executor197059266", 4096) = 27 getrandom("\xd2\x64\xe2\x4d\xed\xbd\xe9\x84", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556aa7d00 brk(0x555556ac8d00) = 0x555556ac8d00 brk(0x555556ac9000) = 0x555556ac9000 mprotect(0x7fd108c65000, 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=0x555556aa7650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555556aa7660, 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 [ 24.022269][ T23] audit: type=1400 audit(1711580122.980:66): avc: denied { execmem } for pid=356 comm="syz-executor197" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.027303][ 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 [pid 357] dup(4) = 5 [ 24.042050][ T23] audit: type=1400 audit(1711580122.990:67): avc: denied { read } for pid=357 comm="syz-executor197" name="kvm" dev="devtmpfs" ino=9220 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 24.080796][ T23] audit: type=1400 audit(1711580122.990:68): avc: denied { open } for pid=357 comm="syz-executor197" path="/dev/kvm" dev="devtmpfs" ino=9220 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [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 [pid 357] ioctl(6, KVM_RUN, 0) = 0 [pid 357] exit_group(0) = ? [pid 357] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=357, si_uid=0, si_status=0, si_utime=0, si_stime=8} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 360 attached , child_tidptr=0x555556aa7650) = 360 [pid 360] set_robust_list(0x555556aa7660, 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 [pid 360] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [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=KVM_MEM_LOG_DIRTY_PAGES|KVM_MEM_READONLY, guest_phys_addr=0, memory_size=8192, userspace_addr=0x20000000}) = 0 [pid 360] ioctl(6, KVM_RUN, 0) = 0 [pid 360] exit_group(0) = ? [pid 360] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=360, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 362 attached [pid 362] set_robust_list(0x555556aa7660, 24) = 0 [pid 362] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 362] setpgid(0, 0) = 0 [pid 356] <... clone resumed>, child_tidptr=0x555556aa7650) = 362 [pid 362] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 362] write(3, "1000", 4) = 4 [pid 362] close(3) = 0 [pid 362] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 24.104218][ T23] audit: type=1400 audit(1711580122.990:69): avc: denied { ioctl } for pid=357 comm="syz-executor197" path="/dev/kvm" dev="devtmpfs" ino=9220 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [pid 362] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 362] dup(4) = 5 [pid 362] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 362] 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 [pid 362] ioctl(6, KVM_RUN, 0) = 0 [pid 362] exit_group(0) = ? [pid 362] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=362, si_uid=0, si_status=0, si_utime=0, si_stime=0} --- restart_syscall(<... resuming interrupted clone ...>) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556aa7650) = 364 ./strace-static-x86_64: Process 364 attached [pid 364] set_robust_list(0x555556aa7660, 24) = 0 [pid 364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 364] setpgid(0, 0) = 0 [pid 364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 364] write(3, "1000", 4) = 4 [pid 364] close(3) = 0 [pid 364] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [pid 364] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 364] dup(4) = 5 [pid 364] ioctl(5, KVM_CREATE_VCPU, 0) = 6 [pid 364] 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 [ 24.231965][ T364] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 24.239593][ T364] #PF: supervisor instruction fetch in kernel mode [ 24.245918][ T364] #PF: error_code(0x0010) - not-present page [ 24.251733][ T364] PGD 1dc2fb067 P4D 1dc2fb067 PUD 1dc2fa067 PMD 0 [ 24.258163][ T364] Oops: 0010 [#1] PREEMPT SMP KASAN [ 24.263198][ T364] CPU: 1 PID: 364 Comm: syz-executor197 Not tainted 5.4.265-syzkaller-00009-g43a5ead9254d #0 [ 24.273176][ T364] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 [ 24.283075][ T364] RIP: 0010:0x86 [ 24.286452][ T364] Code: Bad RIP value. [ 24.290541][ T364] RSP: 0018:ffff8881e1367308 EFLAGS: 00010086 [ 24.296441][ T364] RAX: ffff8881e1367338 RBX: dffffc0000000000 RCX: ffff8881dc096e40 [ 24.304248][ T364] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.312075][ T364] RBP: 0000000000000ec0 R08: ffffffff82315121 R09: ffffffff811c9085 [ 24.319874][ T364] R10: ffff8881dc096e40 R11: 0000000000000002 R12: ffffffff84601550 [ 24.327683][ T364] R13: fffffe0000000ec8 R14: ffff8881dbc50000 R15: fffffe0000000ecb [ 24.335492][ T364] FS: 0000555556aa7380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.344256][ T364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.350680][ T364] CR2: 000000000000005c CR3: 00000001dc187000 CR4: 00000000003426a0 [ 24.358487][ T364] Call Trace: [ 24.361627][ T364] ? __die+0xb4/0x100 [ 24.365433][ T364] ? no_context+0xbda/0xe50 [ 24.369776][ T364] ? is_prefetch+0x4b0/0x4b0 [ 24.374208][ T364] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 24.379583][ T364] ? __do_page_fault+0xa7d/0xbb0 [ 24.384356][ T364] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 24.389921][ T364] ? __bad_area_nosemaphore+0xc0/0x460 [ 24.395205][ T364] ? page_fault+0x2f/0x40 [ 24.399368][ T364] ? __entry_text_end+0x4/0x4 [ 24.403883][ T364] ? vmx_handle_exit_irqoff+0x45/0x220 [ 24.409185][ T364] ? check_preemption_disabled+0x91/0x320 [ 24.414736][ T364] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 24.420982][ T364] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 24.427228][ T364] ? __entry_text_end+0x4/0x4 [ 24.431740][ T364] ? vcpu_enter_guest+0x2d06/0x9f70 [ 24.436782][ T364] ? check_preemption_disabled+0x9f/0x320 [ 24.442334][ T364] ? debug_smp_processor_id+0x20/0x20 [ 24.447547][ T364] ? __free_pages_ok+0x847/0x950 [ 24.452316][ T364] ? __kvm_set_memory_region+0xda6/0xf60 [ 24.457872][ T364] ? kvm_vm_ioctl_set_memory_region+0x67/0x90 [ 24.463769][ T364] ? do_vfs_ioctl+0x742/0x1720 [ 24.468370][ T364] ? __x64_sys_ioctl+0xd4/0x110 [ 24.473065][ T364] ? do_syscall_64+0xca/0x1c0 [ 24.477657][ T364] ? local_bh_enable+0x20/0x20 [ 24.482255][ T364] ? __free_one_page+0x7f3/0xa60 [ 24.487030][ T364] ? _raw_spin_unlock+0x49/0x60 [ 24.491720][ T364] ? check_preemption_disabled+0x9f/0x320 [ 24.497271][ T364] ? set_pageblock_migratetype+0x150/0x150 [ 24.502915][ T364] ? debug_smp_processor_id+0x20/0x20 [ 24.508120][ T364] ? kvm_mmu_slot_remove_write_access+0x4d8/0x530 [ 24.514371][ T364] ? check_preemption_disabled+0x9f/0x320 [ 24.519930][ T364] ? llist_add_batch+0x91/0xb0 [ 24.524526][ T364] ? generic_exec_single+0x280/0x3e0 [ 24.529650][ T364] ? smp_call_function_single+0x4a0/0x4a0 [ 24.535203][ T364] ? update_load_avg+0x40f/0x1210 [ 24.540061][ T364] ? cpuacct_charge+0xe2/0x170 [ 24.544664][ T364] ? smp_call_function_single+0x388/0x4a0 [ 24.550378][ T364] ? loaded_vmcs_clear+0x80/0x80 [ 24.555078][ T364] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 24.562118][ T364] ? check_preemption_disabled+0x9f/0x320 [ 24.567674][ T364] ? loaded_vmcs_clear+0x80/0x80 [ 24.572445][ T364] ? debug_smp_processor_id+0x20/0x20 [ 24.577650][ T364] ? check_preempt_wakeup+0x41a/0x9f0 [ 24.582858][ T364] ? get_cpu_entry_area+0x8/0x30 [ 24.587631][ T364] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 24.592666][ T364] ? read_msr+0x40/0x40 [ 24.596660][ T364] ? check_preemption_disabled+0x9f/0x320 [ 24.602219][ T364] ? debug_smp_processor_id+0x20/0x20 [ 24.607427][ T364] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 24.612980][ T364] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 24.617662][ T364] ? create_vcpu_fd+0x120/0x120 [ 24.622350][ T364] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 24.627298][ T364] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.632681][ T364] ? cgroup_update_frozen+0x157/0xab0 [ 24.637886][ T364] ? cgroup_update_frozen+0x157/0xab0 [ 24.643094][ T364] ? cgroup_leave_frozen+0x13c/0x290 [ 24.648217][ T364] ? ptrace_stop+0x6ee/0xa30 [ 24.652642][ T364] ? create_vcpu_fd+0x120/0x120 [ 24.657326][ T364] ? do_vfs_ioctl+0x742/0x1720 [ 24.661927][ T364] ? ioctl_preallocate+0x250/0x250 [ 24.666874][ T364] ? check_preemption_disabled+0x153/0x320 [ 24.672516][ T364] ? syscall_trace_enter+0x650/0x940 [ 24.677640][ T364] ? do_syscall_64+0x1c0/0x1c0 [ 24.682234][ T364] ? switch_fpu_return+0x1d4/0x410 [ 24.687185][ T364] ? security_file_ioctl+0x7d/0xa0 [ 24.692129][ T364] ? __x64_sys_ioctl+0xd4/0x110 [ 24.696865][ T364] ? do_syscall_64+0xca/0x1c0 [ 24.701335][ T364] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.707227][ T364] Modules linked in: [ 24.710959][ T364] CR2: 0000000000000086 [ 24.714955][ T364] ---[ end trace ac0d651b93473ae5 ]--- [ 24.720248][ T364] RIP: 0010:0x86 [ 24.723637][ T364] Code: Bad RIP value. [ 24.727540][ T364] RSP: 0018:ffff8881e1367308 EFLAGS: 00010086 [ 24.733440][ T364] RAX: ffff8881e1367338 RBX: dffffc0000000000 RCX: ffff8881dc096e40 [ 24.741262][ T364] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 24.749066][ T364] RBP: 0000000000000ec0 R08: ffffffff82315121 R09: ffffffff811c9085 [ 24.756873][ T364] R10: ffff8881dc096e40 R11: 0000000000000002 R12: ffffffff84601550 [ 24.764694][ T364] R13: fffffe0000000ec8 R14: ffff8881dbc50000 R15: fffffe0000000ecb [ 24.772498][ T364] FS: 0000555556aa7380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.781270][ T364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.787685][ T364] CR2: 000000000000005c CR3: 00000001dc187000 CR4: 00000000003426a0 [ 24.795500][ T364] Kernel panic - not syncing: Fatal exception [ 24.801563][ T364] Kernel Offset: disabled [ 24.805686][ T364] Rebooting in 86400 seconds..