./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor645441846 <...> forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 14.394663][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 14.394671][ T22] audit: type=1400 audit(1660975829.909:71): avc: denied { transition } for pid=265 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 [ 14.399000][ T22] audit: type=1400 audit(1660975829.919:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[605]" dev="pipefs" ino=605 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 14.879812][ T268] scp (268) used greatest stack depth: 26544 bytes left Warning: Permanently added '10.128.1.123' (ECDSA) to the list of known hosts. execve("./syz-executor645441846", ["./syz-executor645441846"], 0x7ffd57a5f540 /* 10 vars */) = 0 brk(NULL) = 0x555556cbb000 brk(0x555556cbbc40) = 0x555556cbbc40 arch_prctl(ARCH_SET_FS, 0x555556cbb300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor645441846", 4096) = 27 brk(0x555556cdcc40) = 0x555556cdcc40 brk(0x555556cdd000) = 0x555556cdd000 mprotect(0x7f44d9a7c000, 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=0x200019c0, 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 [ 20.949987][ T22] audit: type=1400 audit(1660975836.469:73): avc: denied { execmem } for pid=304 comm="syz-executor645" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.969508][ T22] audit: type=1400 audit(1660975836.469:74): avc: denied { prog_load } for pid=304 comm="syz-executor645" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 20.970418][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 20.989945][ T22] audit: type=1400 audit(1660975836.489:75): avc: denied { prog_run } for pid=304 comm="syz-executor645" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 20.994984][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 21.022290][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 21.029213][ T304] CPU: 1 PID: 304 Comm: syz-executor645 Not tainted 5.4.197-syzkaller-00011-gf3c75e616e3f #0 [ 21.039495][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 21.049537][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 21.056020][ T304] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 90 14 2a 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 [ 21.075678][ T304] RSP: 0018:ffff8881dd607908 EFLAGS: 00010203 [ 21.081737][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 21.089680][ T304] RDX: ffff8881de390fc0 RSI: 0000000000000080 RDI: 000000000000011c [ 21.097625][ T304] RBP: 0000000000000080 R08: ffffffff8362a777 R09: ffff8881dd607b70 [ 21.105582][ T304] R10: ffffed103bac0f70 R11: 1ffff1103bac0f6e R12: dffffc0000000000 [ 21.113520][ T304] R13: 0000000000000001 R14: 0000000000000100 R15: ffff8881e0962812 [ 21.121468][ T304] FS: 0000555556cbb300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.130369][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.136924][ T304] CR2: 0000562d43ea50b8 CR3: 00000001dd447000 CR4: 00000000003406e0 [ 21.144882][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.152893][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.160839][ T304] Call Trace: [ 21.164110][ T304] ? common_interrupt+0xa/0xf [ 21.168764][ T304] ? ktime_get+0xfd/0x130 [ 21.173072][ T304] ? bpf_test_run+0x260/0x640 [ 21.177730][ T304] ? bpf_prog_test_run_skb+0x7a2/0xf00 [ 21.183180][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 21.188984][ T304] ? __se_sys_bpf+0x2b7b/0xb990 [ 21.193806][ T304] ? __schedule+0x8d3/0xfc0 [ 21.198283][ T304] ? cgroup_update_frozen+0x139/0x360 [ 21.203627][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 21.208712][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 21.213800][ T304] ? ptrace_stop+0x6eb/0xa30 [ 21.218370][ T304] ? syscall_trace_enter+0x5c2/0x860 [ 21.223624][ T304] ? check_preemption_disabled+0xde/0x2c0 [ 21.229314][ T304] ? do_syscall_64+0xcb/0x1c0 [ 21.233964][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.239994][ T304] Modules linked in: [ 21.243912][ T304] ---[ end trace 7bbd4186842d77e9 ]--- [ 21.249376][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 21.255868][ T304] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 90 14 2a 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 [ 21.275489][ T304] RSP: 0018:ffff8881dd607908 EFLAGS: 00010203 [ 21.281530][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 21.289506][ T304] RDX: ffff8881de390fc0 RSI: 0000000000000080 RDI: 000000000000011c [ 21.297472][ T304] RBP: 0000000000000080 R08: ffffffff8362a777 R09: ffff8881dd607b70 [ 21.305464][ T304] R10: ffffed103bac0f70 R11: 1ffff1103bac0f6e R12: dffffc0000000000 [ 21.313447][ T304] R13: 0000000000000001 R14: 0000000000000100 R15: ffff8881e0962812 [ 21.321424][ T304] FS: 0000555556cbb300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.330353][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.336936][ T304] CR2: 0000562d43ea50b8 CR3: 00000001dd447000 CR4: 00000000003406e0 [ 21.344889][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.352864][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.360836][ T304] Kernel panic - not syncing: Fatal exception [ 21.367039][ T304] Kernel Offset: disabled [ 21.371338][ T304] Rebooting in 86400 seconds..