./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4069269932 <...> Warning: Permanently added '10.128.1.153' (ED25519) to the list of known hosts. execve("./syz-executor4069269932", ["./syz-executor4069269932"], 0x7fff27670d70 /* 10 vars */) = 0 brk(NULL) = 0x555555762000 brk(0x555555762d00) = 0x555555762d00 arch_prctl(ARCH_SET_FS, 0x555555762380) = 0 set_tid_address(0x555555762650) = 356 set_robust_list(0x555555762660, 24) = 0 rseq(0x555555762ca0, 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-executor4069269932", 4096) = 28 getrandom("\xaf\x82\x2a\xe0\xa1\x62\xe4\xcf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555762d00 brk(0x555555783d00) = 0x555555783d00 brk(0x555555784000) = 0x555555784000 mprotect(0x7f4f63e52000, 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=0x555555762650) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] set_robust_list(0x555555762660, 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 [ 23.349840][ T23] audit: type=1400 audit(1713867462.060:66): avc: denied { execmem } for pid=356 comm="syz-executor406" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.365004][ 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. [ 23.369076][ T23] audit: type=1400 audit(1713867462.070:67): avc: denied { read } for pid=357 comm="syz-executor406" name="kvm" dev="devtmpfs" ino=110 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.407945][ T23] audit: type=1400 audit(1713867462.070:68): avc: denied { open } for pid=357 comm="syz-executor406" path="/dev/kvm" dev="devtmpfs" ino=110 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(5, KVM_SET_USER_MEMORY_REGION, {slot=0, flags=KVM_MEM_LOG_DIRTY_PAGES, guest_phys_addr=0x5000, memory_size=8192, userspace_addr=0x20000000}) = 0 [ 23.431117][ T23] audit: type=1400 audit(1713867462.070:69): avc: denied { ioctl } for pid=357 comm="syz-executor406" path="/dev/kvm" dev="devtmpfs" ino=110 ioctlcmd=0xae01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:kvm_device_t tclass=chr_file permissive=1 [ 23.474844][ T357] BUG: kernel NULL pointer dereference, address: 0000000000000086 [ 23.482454][ T357] #PF: supervisor instruction fetch in kernel mode [ 23.488899][ T357] #PF: error_code(0x0010) - not-present page [ 23.494719][ T357] PGD 1dccba067 P4D 1dccba067 PUD 1dccbb067 PMD 0 [ 23.501053][ T357] Oops: 0010 [#1] PREEMPT SMP KASAN [ 23.506088][ T357] CPU: 1 PID: 357 Comm: syz-executor406 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 23.516075][ T357] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 23.525993][ T357] RIP: 0010:0x86 [ 23.529355][ T357] Code: Bad RIP value. [ 23.533251][ T357] RSP: 0018:ffff8881dbeff308 EFLAGS: 00010086 [ 23.539155][ T357] RAX: ffff8881dbeff338 RBX: dffffc0000000000 RCX: ffff8881dc9f0fc0 [ 23.546965][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.554782][ T357] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.562601][ T357] R10: ffff8881dc9f0fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 23.570402][ T357] R13: fffffe0000000278 R14: ffff8881dbfc0000 R15: fffffe000000027b [ 23.578213][ T357] FS: 0000555555762380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.586979][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.593401][ T357] CR2: 000000000000005c CR3: 00000001e06d5000 CR4: 00000000003426a0 [ 23.601212][ T357] Call Trace: [ 23.604347][ T357] ? __die+0xb4/0x100 [ 23.608158][ T357] ? no_context+0xbda/0xe50 [ 23.612498][ T357] ? is_prefetch+0x4b0/0x4b0 [ 23.616925][ T357] ? rcu_preempt_deferred_qs+0xa4/0x2b0 [ 23.622304][ T357] ? __do_page_fault+0xa7d/0xbb0 [ 23.627080][ T357] ? vmx_spec_ctrl_restore_host+0x83/0xfd [ 23.632640][ T357] ? __bad_area_nosemaphore+0xc0/0x460 [ 23.637935][ T357] ? page_fault+0x2f/0x40 [ 23.642093][ T357] ? irq_entries_start+0x38/0x660 [ 23.646954][ T357] ? vmx_handle_exit_irqoff+0x45/0x220 [ 23.652249][ T357] ? check_preemption_disabled+0x91/0x320 [ 23.657819][ T357] ? handle_external_interrupt_irqoff+0x148/0x2f0 [ 23.664053][ T357] ? handle_external_interrupt_irqoff+0x12a/0x2f0 [ 23.670302][ T357] ? irq_entries_start+0x38/0x660 [ 23.675168][ T357] ? vcpu_enter_guest+0x2d06/0x9f70 [ 23.680201][ T357] ? find_next_and_bit+0x156/0x190 [ 23.685141][ T357] ? load_balance+0x43e1/0x7a40 [ 23.689833][ T357] ? __free_pages_ok+0x847/0x950 [ 23.694605][ T357] ? local_bh_enable+0x20/0x20 [ 23.699203][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.704759][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.709970][ T357] ? llist_add_batch+0x91/0xb0 [ 23.714567][ T357] ? generic_exec_single+0x280/0x3e0 [ 23.719688][ T357] ? smp_call_function_single+0x4a0/0x4a0 [ 23.725294][ T357] ? smp_call_function_single+0x388/0x4a0 [ 23.730811][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 23.735578][ T357] ? generic_smp_call_function_single_interrupt+0x10/0x10 [ 23.742516][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.748067][ T357] ? loaded_vmcs_clear+0x80/0x80 [ 23.752841][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.758057][ T357] ? get_cpu_entry_area+0x8/0x30 [ 23.762819][ T357] ? vmx_vcpu_load_vmcs+0x655/0x8b0 [ 23.767856][ T357] ? read_msr+0x40/0x40 [ 23.771848][ T357] ? check_preemption_disabled+0x9f/0x320 [ 23.777403][ T357] ? debug_smp_processor_id+0x20/0x20 [ 23.782615][ T357] ? kvm_arch_vcpu_ioctl_run+0x748/0x18d0 [ 23.788174][ T357] ? kvm_vcpu_ioctl+0x7f9/0xd10 [ 23.792852][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.797564][ T357] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 23.802484][ T357] ? _raw_spin_lock_irqsave+0x210/0x210 [ 23.807879][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.813077][ T357] ? cgroup_update_frozen+0x157/0xab0 [ 23.818284][ T357] ? cgroup_leave_frozen+0x13c/0x290 [ 23.823407][ T357] ? ptrace_stop+0x6ee/0xa30 [ 23.827828][ T357] ? create_vcpu_fd+0x120/0x120 [ 23.832515][ T357] ? do_vfs_ioctl+0x742/0x1720 [ 23.837120][ T357] ? ioctl_preallocate+0x250/0x250 [ 23.842075][ T357] ? check_preemption_disabled+0x153/0x320 [ 23.847712][ T357] ? syscall_trace_enter+0x650/0x940 [ 23.852833][ T357] ? do_syscall_64+0x1c0/0x1c0 [ 23.857427][ T357] ? switch_fpu_return+0x1d4/0x410 [ 23.862372][ T357] ? security_file_ioctl+0x7d/0xa0 [ 23.867322][ T357] ? __x64_sys_ioctl+0xd4/0x110 [ 23.872007][ T357] ? do_syscall_64+0xca/0x1c0 [ 23.876521][ T357] ? entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 23.882418][ T357] Modules linked in: [ 23.886162][ T357] CR2: 0000000000000086 [ 23.890155][ T357] ---[ end trace 1b67a3971cb2c68d ]--- [ 23.895446][ T357] RIP: 0010:0x86 [ 23.898828][ T357] Code: Bad RIP value. [ 23.902730][ T357] RSP: 0018:ffff8881dbeff308 EFLAGS: 00010086 [ 23.908633][ T357] RAX: ffff8881dbeff338 RBX: dffffc0000000000 RCX: ffff8881dc9f0fc0 [ 23.916443][ T357] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 23.924254][ T357] RBP: 0000000000000270 R08: ffffffff82315341 R09: ffffffff811c9085 [ 23.932066][ T357] R10: ffff8881dc9f0fc0 R11: 0000000000000002 R12: ffffffff84600228 [ 23.939881][ T357] R13: fffffe0000000278 R14: ffff8881dbfc0000 R15: fffffe000000027b [ 23.947689][ T357] FS: 0000555555762380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 23.956455][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 23.962875][ T357] CR2: 000000000000005c CR3: 00000001e06d5000 CR4: 00000000003426a0 [ 23.970692][ T357] Kernel panic - not syncing: Fatal exception [ 23.976801][ T357] Kernel Offset: disabled [ 23.980925][ T357] Rebooting in 86400 seconds..