./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3067225360 <...> no interfaces have a carrier Starting sshd: OK syzkaller syzkaller login: [ 14.479512][ T23] kauditd_printk_skb: 60 callbacks suppressed [ 14.479518][ T23] audit: type=1400 audit(1669626059.080:71): avc: denied { transition } for pid=264 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.486013][ T23] audit: type=1400 audit(1669626059.090:72): avc: denied { write } for pid=264 comm="sh" path="pipe:[9779]" dev="pipefs" ino=9779 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 15.789520][ T265] sshd (265) used greatest stack depth: 21912 bytes left Warning: Permanently added '10.128.1.83' (ECDSA) to the list of known hosts. execve("./syz-executor3067225360", ["./syz-executor3067225360"], 0x7ffc42445bc0 /* 10 vars */) = 0 brk(NULL) = 0x555557497000 brk(0x555557497c40) = 0x555557497c40 arch_prctl(ARCH_SET_FS, 0x555557497300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3067225360", 4096) = 28 brk(0x5555574b8c40) = 0x5555574b8c40 brk(0x5555574b9000) = 0x5555574b9000 mprotect(0x7f03fe67a000, 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 bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SCHED_ACT, insn_cnt=14, insns=0x200009c0, license="syzkaller", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS}, 72) = 3 [ 21.867251][ T23] audit: type=1400 audit(1669626066.470:73): avc: denied { execmem } for pid=303 comm="syz-executor306" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.886786][ T23] audit: type=1400 audit(1669626066.470:74): avc: denied { prog_load } for pid=303 comm="syz-executor306" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 21.887584][ T303] kasan: CONFIG_KASAN_INLINE enabled [ 21.906179][ T23] audit: type=1400 audit(1669626066.490:75): avc: denied { prog_run } for pid=303 comm="syz-executor306" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 21.911296][ T303] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.938716][ T303] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 21.945645][ T303] CPU: 1 PID: 303 Comm: syz-executor306 Not tainted 5.4.210-syzkaller-00006-gc80a5b2e7f63 #0 [ 21.955763][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 21.965872][ T303] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 21.972343][ T303] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 64 14 fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 3e 01 00 00 8b ab 1c 01 00 00 89 ef 44 89 [ 21.991914][ T303] RSP: 0018:ffff8881dd5474b8 EFLAGS: 00010203 [ 21.997946][ T303] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 22.005903][ T303] RDX: ffff8881dd4faf40 RSI: 0000000000000080 RDI: 000000000000011c [ 22.013961][ T303] RBP: 0000000000000080 R08: ffffffff837f3ed7 R09: ffff8881dd547760 [ 22.021905][ T303] R10: ffffed103baa8eee R11: 1ffff1103baa8eec R12: dffffc0000000000 [ 22.029963][ T303] R13: fffffffae88603b8 R14: 0000000000000000 R15: ffff8881e042a012 [ 22.037916][ T303] FS: 0000555557497300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.046819][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.053374][ T303] CR2: 00007fac5fe95a70 CR3: 00000001dd508000 CR4: 00000000003406e0 [ 22.061321][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.069265][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.077204][ T303] Call Trace: [ 22.080468][ T303] ? __kasan_kmalloc+0x131/0x1e0 [ 22.085384][ T303] ? kmem_cache_alloc+0xd0/0x210 [ 22.090564][ T303] ? build_skb+0x27/0x450 [ 22.094873][ T303] ? bpf_prog_test_run_skb+0x3f6/0xf80 [ 22.100317][ T303] ? __se_sys_bpf+0x2bbc/0xbba0 [ 22.105143][ T303] ? do_syscall_64+0xcb/0x1c0 [ 22.109791][ T303] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 22.115833][ T303] ? common_interrupt+0xa/0xf [ 22.120484][ T303] ? ktime_get+0xfd/0x130 [ 22.124784][ T303] ? bpf_test_run+0x2b4/0x6a0 [ 22.129434][ T303] ? bpf_ctx_init+0x1b0/0x1b0 [ 22.134080][ T303] ? bpf_prog_test_run_skb+0x842/0xf80 [ 22.139627][ T303] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 22.145494][ T303] ? __fdget+0x14f/0x200 [ 22.149704][ T303] ? bpf_prog_get+0x183/0x1b0 [ 22.154349][ T303] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 22.160124][ T303] ? __se_sys_bpf+0x2bbc/0xbba0 [ 22.164947][ T303] ? check_preemption_disabled+0x9e/0x330 [ 22.170643][ T303] ? rcu_softirq_qs+0x90/0x90 [ 22.175289][ T303] ? debug_smp_processor_id+0x20/0x20 [ 22.180626][ T303] ? check_preemption_disabled+0x9e/0x330 [ 22.186314][ T303] ? check_preemption_disabled+0x9e/0x330 [ 22.192003][ T303] ? debug_smp_processor_id+0x20/0x20 [ 22.197343][ T303] ? switch_mm_irqs_off+0x542/0x960 [ 22.202511][ T303] ? debug_smp_processor_id+0x20/0x20 [ 22.207851][ T303] ? __x64_sys_bpf+0x80/0x80 [ 22.212439][ T303] ? switch_mm+0x100/0x100 [ 22.216839][ T303] ? _raw_spin_unlock_irq+0x4a/0x60 [ 22.222012][ T303] ? finish_task_switch+0x130/0x560 [ 22.227186][ T303] ? __schedule+0x98e/0x1050 [ 22.231754][ T303] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 22.236837][ T303] ? _raw_spin_lock_irqsave+0x210/0x210 [ 22.242354][ T303] ? cgroup_update_frozen+0x139/0x360 [ 22.247693][ T303] ? cgroup_update_frozen+0x139/0x360 [ 22.253031][ T303] ? cgroup_leave_frozen+0x13b/0x290 [ 22.258284][ T303] ? ptrace_stop+0x6eb/0xa30 [ 22.262846][ T303] ? _raw_spin_unlock_irq+0x4a/0x60 [ 22.268011][ T303] ? ptrace_notify+0x248/0x340 [ 22.272740][ T303] ? do_notify_parent+0xa40/0xa40 [ 22.277737][ T303] ? check_preemption_disabled+0x154/0x330 [ 22.283511][ T303] ? syscall_trace_enter+0x652/0x940 [ 22.288764][ T303] ? switch_fpu_return+0x10/0x10 [ 22.293669][ T303] ? do_syscall_64+0xcb/0x1c0 [ 22.298314][ T303] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 22.304345][ T303] Modules linked in: [ 22.308273][ T303] ---[ end trace f03870950700aafb ]--- [ 22.313718][ T303] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 22.320218][ T303] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 64 14 fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 3e 01 00 00 8b ab 1c 01 00 00 89 ef 44 89 [ 22.340000][ T303] RSP: 0018:ffff8881dd5474b8 EFLAGS: 00010203 [ 22.346059][ T303] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 22.354011][ T303] RDX: ffff8881dd4faf40 RSI: 0000000000000080 RDI: 000000000000011c [ 22.361988][ T303] RBP: 0000000000000080 R08: ffffffff837f3ed7 R09: ffff8881dd547760 [ 22.370042][ T303] R10: ffffed103baa8eee R11: 1ffff1103baa8eec R12: dffffc0000000000 [ 22.378006][ T303] R13: fffffffae88603b8 R14: 0000000000000000 R15: ffff8881e042a012 [ 22.385970][ T303] FS: 0000555557497300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.394866][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.401450][ T303] CR2: 00007fac5fe95a70 CR3: 00000001dd508000 CR4: 00000000003406e0 [ 22.409433][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.417397][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.425381][ T303] Kernel panic - not syncing: Fatal exception [ 22.431597][ T303] Kernel Offset: disabled [ 22.435897][ T303] Rebooting in 86400 seconds..