./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor123843736 <...> Warning: Permanently added '10.128.1.64' (ED25519) to the list of known hosts. execve("./syz-executor123843736", ["./syz-executor123843736"], 0x7ffc49324f20 /* 10 vars */) = 0 brk(NULL) = 0x555555816000 brk(0x555555816d00) = 0x555555816d00 arch_prctl(ARCH_SET_FS, 0x555555816380) = 0 set_tid_address(0x555555816650) = 354 set_robust_list(0x555555816660, 24) = 0 rseq(0x555555816ca0, 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-executor123843736", 4096) = 27 getrandom("\xe8\x93\x09\xc5\x31\x21\x6b\xf3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555816d00 brk(0x555555837d00) = 0x555555837d00 brk(0x555555838000) = 0x555555838000 mprotect(0x7f594cf3c000, 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=0x555555816650) = 355 ./strace-static-x86_64: Process 355 attached [pid 355] set_robust_list(0x555555816660, 24) = 0 [pid 355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 355] setpgid(0, 0) = 0 [pid 355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 355] write(3, "1000", 4) = 4 [pid 355] close(3) = 0 [pid 355] openat(AT_FDCWD, "/dev/kvm", O_RDONLY) = 3 [ 25.619252][ T23] audit: type=1400 audit(1713591042.469:66): avc: denied { execmem } for pid=354 comm="syz-executor123" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 25.653739][ T23] audit: type=1400 audit(1713591042.499:67): avc: denied { read } for pid=355 comm="syz-executor123" 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 [ 25.667599][ T355] 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. [ 25.685498][ T23] audit: type=1400 audit(1713591042.499:68): avc: denied { open } for pid=355 comm="syz-executor123" 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 355] ioctl(3, KVM_CREATE_VM, 0) = 4 [pid 355] ioctl(4, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=0, guest_phys_addr=0, memory_size=536879104, userspace_addr=0x20000000}) = 0 [pid 355] ioctl(4, KVM_CREATE_VCPU, 0) = 5 [ 25.739465][ T23] audit: type=1400 audit(1713591042.519:69): avc: denied { ioctl } for pid=355 comm="syz-executor123" 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 [ 25.796337][ T355] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 25.807498][ T355] #PF: supervisor instruction fetch in kernel mode [ 25.817776][ T355] #PF: error_code(0x0010) - not-present page [ 25.825775][ T355] PGD 1dbcdb067 P4D 1dbcdb067 PUD 1dbe3b067 PMD 0 [ 25.836077][ T355] Oops: 0010 [#1] PREEMPT SMP KASAN [ 25.844632][ T355] CPU: 0 PID: 355 Comm: syz-executor123 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 25.860832][ T355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 25.874490][ T355] RIP: 0010:0x86 [ 25.879435][ T355] Code: Bad RIP value. [ 25.884072][ T355] RSP: 0018:ffff8881dbfb7308 EFLAGS: 00010086 [ 25.892454][ T355] RAX: ffff8881dbfb7338 RBX: dffffc0000000000 RCX: ffff8881dbf61f80 [ 25.903187][ T355] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 25.914257][ T355] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 25.925585][ T355] R10: ffff8881dbf61f80 R11: 0000000000000002 R12: ffffffff84600238 [ 25.934965][ T355] R13: fffffe0000000298 R14: ffff8881db878000 R15: fffffe000000029b [ 25.944259][ T355] FS: 0000555555816380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 25.955431][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.963970][ T355] CR2: 000000000000005c CR3: 00000001dc3c3000 CR4: 00000000003426b0 [ 25.975296][ T355] Call Trace: [ 25.980197][ T355] ? __die+0xb4/0x100 [ 25.985058][ T355] ? no_context+0xbda/0xe50 [ 25.990997][ T355] ? is_prefetch+0x4b0/0x4b0 [ 25.996051][ T355] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 26.004218][ T355] ? __do_page_fault+0xa7d/0xbb0 [ 26.010734][ T355] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 26.018372][ T355] ? __bad_area_nosemaphore+0xc0/0x460 [ 26.026393][ T355] ? page_fault+0x2f/0x40 [ 26.031364][ T355] ? irq_entries_start+0x48/0x660 [ 26.037187][ T355] ? vmx_handle_exit_irqoff+0x45/0x220 [ 26.044348][ T355] ? check_preemption_disabled+0x91/0x320 [ 26.051069][ T355] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 26.058275][ T355] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 26.067175][ T355] ? irq_entries_start+0x48/0x660 [ 26.073053][ T355] ? vcpu_enter_guest+0x2d06/0x9f70 [ 26.080521][ T355] ? find_next_and_bit+0x156/0x190 [ 26.092441][ T355] ? load_balance+0x43e1/0x7a40 [ 26.098780][ T355] ? local_bh_enable+0x20/0x20 [ 26.104971][ T355] ? check_preemption_disabled+0x9f/0x320 [ 26.113302][ T355] ? update_blocked_averages+0xd50/0xd50 [ 26.119997][ T355] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 26.127056][ T355] ? read_msr+0x40/0x40 [ 26.132203][ T355] ? update_rq_clock+0x67/0x350 [ 26.137526][ T355] ? check_preemption_disabled+0x9f/0x320 [ 26.146181][ T355] ? kvm_sched_clock_read+0x14/0x40 [ 26.153678][ T355] ? check_preemption_disabled+0x9f/0x320 [ 26.163159][ T355] ? debug_smp_processor_id+0x20/0x20 [ 26.170903][ T355] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 26.177567][ T355] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 26.184235][ T355] ? create_vcpu_fd+0x120/0x120 [ 26.191552][ T355] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 26.197590][ T355] ? _raw_spin_lock_irqsave+0x210/0x210 [ 26.207841][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 26.214984][ T355] ? cgroup_update_frozen+0x157/0xab0 [ 26.220978][ T355] ? cgroup_leave_frozen+0x13c/0x290 [ 26.227976][ T355] ? ptrace_stop+0x6ee/0xa30 [ 26.233563][ T355] ? create_vcpu_fd+0x120/0x120 [ 26.239476][ T355] ? do_vfs_ioctl+0x742/0x1720 [ 26.245642][ T355] ? ioctl_preallocate+0x250/0x250 [ 26.250939][ T355] ? check_preemption_disabled+0x153/0x320 [ 26.259449][ T355] ? syscall_trace_enter+0x650/0x940 [ 26.266280][ T355] ? do_syscall_64+0x1c0/0x1c0 [ 26.274634][ T355] ? switch_fpu_return+0x1d4/0x410 [ 26.280124][ T355] ? security_file_ioctl+0x7d/0xa0 [ 26.287165][ T355] ? __x64_sys_ioctl+0xd4/0x110 [ 26.294536][ T355] ? do_syscall_64+0xca/0x1c0 [ 26.302026][ T355] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 26.310515][ T355] Modules linked in: [ 26.316454][ T355] CR2: 0000000000000086 [ 26.321820][ T355] ---[ end trace 1ffc749fbd6a6e08 ]--- [ 26.328228][ T355] RIP: 0010:0x86 [ 26.331993][ T355] Code: Bad RIP value. [ 26.338964][ T355] RSP: 0018:ffff8881dbfb7308 EFLAGS: 00010086 [ 26.348832][ T355] RAX: ffff8881dbfb7338 RBX: dffffc0000000000 RCX: ffff8881dbf61f80 [ 26.357642][ T355] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 26.369094][ T355] RBP: 0000000000000290 R08: ffffffff82315341 R09: ffffffff811c9085 [ 26.385725][ T355] R10: ffff8881dbf61f80 R11: 0000000000000002 R12: ffffffff84600238 [ 26.395738][ T355] R13: fffffe0000000298 R14: ffff8881db878000 R15: fffffe000000029b [ 26.407216][ T355] FS: 0000555555816380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 26.417394][ T355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.427299][ T355] CR2: 000000000000005c CR3: 00000001dc3c3000 CR4: 00000000003426b0 [ 26.438104][ T355] Kernel panic - not syncing: Fatal exception [ 26.448009][ T355] Kernel Offset: disabled [ 26.454325][ T355] Rebooting in 86400 seconds..