./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3416685025 <...> forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 16.995142][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 16.995149][ T22] audit: type=1400 audit(1660973957.500:71): 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 [ 16.999978][ T22] audit: type=1400 audit(1660973957.500:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[10530]" dev="pipefs" ino=10530 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 17.800951][ T266] sshd (266) used greatest stack depth: 26160 bytes left Warning: Permanently added '10.128.0.85' (ECDSA) to the list of known hosts. execve("./syz-executor3416685025", ["./syz-executor3416685025"], 0x7ffee25af850 /* 10 vars */) = 0 brk(NULL) = 0x555556c63000 brk(0x555556c63c40) = 0x555556c63c40 arch_prctl(ARCH_SET_FS, 0x555556c63300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3416685025", 4096) = 28 brk(0x555556c84c40) = 0x555556c84c40 brk(0x555556c85000) = 0x555556c85000 mprotect(0x7f1e4290f000, 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 [ 23.947536][ T22] audit: type=1400 audit(1660973964.460:73): avc: denied { execmem } for pid=304 comm="syz-executor341" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.966997][ T22] audit: type=1400 audit(1660973964.460:74): avc: denied { prog_load } for pid=304 comm="syz-executor341" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 23.967671][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 23.986460][ T22] audit: type=1400 audit(1660973964.470:75): avc: denied { prog_run } for pid=304 comm="syz-executor341" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 23.991489][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 23.991502][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.025496][ T304] CPU: 1 PID: 304 Comm: syz-executor341 Not tainted 5.4.197-syzkaller-00011-gf3c75e616e3f #0 [ 24.035603][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 24.045644][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 24.052113][ 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 [ 24.071680][ T304] RSP: 0018:ffff8881dd997908 EFLAGS: 00010203 [ 24.077708][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 24.085645][ T304] RDX: ffff8881de850000 RSI: 0000000000000080 RDI: 000000000000011c [ 24.093582][ T304] RBP: 0000000000000080 R08: ffffffff8362a777 R09: ffff8881dd997b70 [ 24.101521][ T304] R10: ffffed103bb32f70 R11: 1ffff1103bb32f6e R12: dffffc0000000000 [ 24.109460][ T304] R13: 000000000000f000 R14: 0000000000000100 R15: ffff8881dd9bd812 [ 24.117398][ T304] FS: 0000555556c63300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.126292][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.132840][ T304] CR2: 00007f1b863d1a70 CR3: 00000001de809000 CR4: 00000000003406e0 [ 24.140778][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.148715][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.156648][ T304] Call Trace: [ 24.159912][ T304] ? common_interrupt+0xa/0xf [ 24.164558][ T304] ? ktime_get+0xfd/0x130 [ 24.168854][ T304] ? bpf_test_run+0x260/0x640 [ 24.173502][ T304] ? bpf_prog_test_run_skb+0x7a2/0xf00 [ 24.178927][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 24.184699][ T304] ? __se_sys_bpf+0x2b7b/0xb990 [ 24.189518][ T304] ? __schedule+0x8d3/0xfc0 [ 24.193989][ T304] ? cgroup_update_frozen+0x139/0x360 [ 24.199323][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 24.204399][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 24.209474][ T304] ? ptrace_stop+0x6eb/0xa30 [ 24.214033][ T304] ? syscall_trace_enter+0x5c2/0x860 [ 24.219286][ T304] ? __fpregs_load_activate+0x163/0x310 [ 24.224796][ T304] ? do_syscall_64+0xcb/0x1c0 [ 24.229437][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.235465][ T304] Modules linked in: [ 24.239377][ T304] ---[ end trace 3f5ab2cc66058760 ]--- [ 24.246467][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 24.252977][ 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 [ 24.272656][ T304] RSP: 0018:ffff8881dd997908 EFLAGS: 00010203 [ 24.278708][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 24.286759][ T304] RDX: ffff8881de850000 RSI: 0000000000000080 RDI: 000000000000011c [ 24.294747][ T304] RBP: 0000000000000080 R08: ffffffff8362a777 R09: ffff8881dd997b70 [ 24.302719][ T304] R10: ffffed103bb32f70 R11: 1ffff1103bb32f6e R12: dffffc0000000000 [ 24.310703][ T304] R13: 000000000000f000 R14: 0000000000000100 R15: ffff8881dd9bd812 [ 24.318671][ T304] FS: 0000555556c63300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.327589][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.334170][ T304] CR2: 00007f1b863d1a70 CR3: 00000001de809000 CR4: 00000000003406e0 [ 24.342145][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.350112][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.358073][ T304] Kernel panic - not syncing: Fatal exception [ 24.364294][ T304] Kernel Offset: disabled [ 24.368598][ T304] Rebooting in 86400 seconds..