./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1416056861 <...> DUID 00:04:ac:9b:ee:c1:b3:e5:fe:34:78:92:aa:7d:97:27:12:4e forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 11.942215][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 11.942223][ T22] audit: type=1400 audit(1652305726.399:71): 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 [ 11.950128][ T22] audit: type=1400 audit(1652305726.409:72): avc: denied { write } for pid=264 comm="sh" path="pipe:[10751]" dev="pipefs" ino=10751 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts. execve("./syz-executor1416056861", ["./syz-executor1416056861"], 0x7ffdf57c6f60 /* 10 vars */) = 0 brk(NULL) = 0x555556af8000 brk(0x555556af8c40) = 0x555556af8c40 arch_prctl(ARCH_SET_FS, 0x555556af8300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1416056861", 4096) = 28 brk(0x555556b19c40) = 0x555556b19c40 brk(0x555556b1a000) = 0x555556b1a000 mprotect(0x7fe0f63ab000, 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=0x20000840, 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 [ 18.540124][ T22] audit: type=1400 audit(1652305732.999:73): avc: denied { execmem } for pid=304 comm="syz-executor141" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 18.544885][ T22] audit: type=1400 audit(1652305733.009:74): avc: denied { prog_load } for pid=304 comm="syz-executor141" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 18.548536][ T22] audit: type=1400 audit(1652305733.009:75): avc: denied { prog_run } for pid=304 comm="syz-executor141" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 18.551676][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 18.552399][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 18.553613][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 18.554601][ T304] CPU: 0 PID: 304 Comm: syz-executor141 Not tainted 5.4.180-syzkaller-00005-gb2ca0128d238 #0 [ 18.556190][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.557928][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 18.558961][ T304] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 80 42 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 [ 18.570357][ T304] RSP: 0018:ffff8881dd5e7908 EFLAGS: 00010203 [ 18.576398][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 18.584340][ T304] RDX: ffff8881dd5d9f80 RSI: 0000000000000080 RDI: 000000000000011c [ 18.592280][ T304] RBP: 0000000000000080 R08: ffffffff83625c57 R09: ffff8881dd5e7b70 [ 18.600220][ T304] R10: ffffed103babcf70 R11: 1ffff1103babcf6e R12: dffffc0000000000 [ 18.608169][ T304] R13: 00000000000000f0 R14: 0000000000000000 R15: ffff8881dd61a012 [ 18.616119][ T304] FS: 0000555556af8300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 18.625022][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.631580][ T304] CR2: 0000560981762768 CR3: 00000001de73d000 CR4: 00000000003406f0 [ 18.639526][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.647466][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.655406][ T304] Call Trace: [ 18.658675][ T304] ? ktime_get+0xfd/0x130 [ 18.662977][ T304] ? bpf_test_run+0x260/0x640 [ 18.667627][ T304] ? bpf_prog_test_run_skb+0x7a2/0xf00 [ 18.673055][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 18.678828][ T304] ? __se_sys_bpf+0x2b7b/0xb990 [ 18.683652][ T304] ? __schedule+0x8d3/0xfc0 [ 18.688123][ T304] ? cgroup_update_frozen+0x139/0x360 [ 18.693462][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 18.698544][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 18.703629][ T304] ? ptrace_stop+0x6eb/0xa30 [ 18.708191][ T304] ? syscall_trace_enter+0x5c2/0x860 [ 18.713542][ T304] ? __fpregs_load_activate+0x163/0x310 [ 18.719055][ T304] ? do_syscall_64+0xcb/0x1c0 [ 18.723702][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 18.729734][ T304] Modules linked in: [ 18.733697][ T304] ---[ end trace cc37cf95017da933 ]--- [ 18.739166][ T304] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 [ 18.745665][ T304] Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 80 42 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 [ 18.765271][ T304] RSP: 0018:ffff8881dd5e7908 EFLAGS: 00010203 [ 18.771310][ T304] RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 [ 18.779277][ T304] RDX: ffff8881dd5d9f80 RSI: 0000000000000080 RDI: 000000000000011c [ 18.787245][ T304] RBP: 0000000000000080 R08: ffffffff83625c57 R09: ffff8881dd5e7b70 [ 18.795212][ T304] R10: ffffed103babcf70 R11: 1ffff1103babcf6e R12: dffffc0000000000 [ 18.803158][ T304] R13: 00000000000000f0 R14: 0000000000000000 R15: ffff8881dd61a012 [ 18.811130][ T304] FS: 0000555556af8300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 18.820049][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.826627][ T304] CR2: 0000560981762768 CR3: 00000001de73d000 CR4: 00000000003406f0 [ 18.834596][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.842540][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.850504][ T304] Kernel panic - not syncing: Fatal exception [ 18.856740][ T304] Kernel Offset: disabled [ 18.861043][ T304] Rebooting in 86400 seconds..