./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1458038106 <...> forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 13.137352][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 13.137359][ T22] audit: type=1400 audit(1652368323.699:71): 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 [ 13.142670][ T22] audit: type=1400 audit(1652368323.699:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[10298]" dev="pipefs" ino=10298 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 13.914680][ T266] sshd (266) used greatest stack depth: 26944 bytes left Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts. execve("./syz-executor1458038106", ["./syz-executor1458038106"], 0x7ffcc1e94580 /* 10 vars */) = 0 brk(NULL) = 0x55555715f000 brk(0x55555715fc40) = 0x55555715fc40 arch_prctl(ARCH_SET_FS, 0x55555715f300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1458038106", 4096) = 28 brk(0x555557180c40) = 0x555557180c40 brk(0x555557181000) = 0x555557181000 mprotect(0x7fb4bd344000, 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_CLS, insn_cnt=4, insns=0x20000c00, license="GPL"}, 21) = 3 [ 20.112411][ T22] audit: type=1400 audit(1652368330.669:73): avc: denied { execmem } for pid=304 comm="syz-executor145" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.131836][ T22] audit: type=1400 audit(1652368330.669:74): avc: denied { prog_load } for pid=304 comm="syz-executor145" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 20.132462][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 20.151259][ T22] audit: type=1400 audit(1652368330.689:75): avc: denied { prog_run } for pid=304 comm="syz-executor145" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 20.156293][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 20.183409][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 20.190308][ T304] CPU: 0 PID: 304 Comm: syz-executor145 Not tainted 5.4.180-syzkaller-00005-gb2ca0128d238 #0 [ 20.200417][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.210504][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 20.216195][ T304] Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 13 44 2a fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f5 43 2a fe 48 8b 1b 48 83 c3 68 [ 20.235768][ T304] RSP: 0018:ffff8881dd617a90 EFLAGS: 00010206 [ 20.241801][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881df745e80 [ 20.249738][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 20.257683][ T304] RBP: ffff8881dd617ae0 R08: ffffffff83625ac3 R09: ffff8881dd617b70 [ 20.265624][ T304] R10: ffffed103bac2f70 R11: 1ffff1103bac2f6e R12: dffffc0000000000 [ 20.273581][ T304] R13: 0000000000008000 R14: ffff8881e04f5012 R15: ffff8881e04f52a0 [ 20.281526][ T304] FS: 000055555715f300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 20.290423][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.296977][ T304] CR2: 0000000000c55258 CR3: 00000001dd545000 CR4: 00000000003406f0 [ 20.304920][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.312864][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.320801][ T304] Call Trace: [ 20.324068][ T304] ? bpf_test_run+0x260/0x640 [ 20.328715][ T304] ? bpf_prog_test_run_skb+0x7a2/0xf00 [ 20.334143][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 20.339929][ T304] ? __se_sys_bpf+0x2b7b/0xb990 [ 20.344745][ T304] ? __schedule+0x8d3/0xfc0 [ 20.349214][ T304] ? cgroup_update_frozen+0x139/0x360 [ 20.354551][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 20.359628][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 20.364706][ T304] ? ptrace_stop+0x6eb/0xa30 [ 20.369267][ T304] ? syscall_trace_enter+0x5c2/0x860 [ 20.374536][ T304] ? __fpregs_load_activate+0x163/0x310 [ 20.380050][ T304] ? do_syscall_64+0xcb/0x1c0 [ 20.384691][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 20.390720][ T304] Modules linked in: [ 20.394630][ T304] ---[ end trace 2c176191ca0e24d4 ]--- [ 20.400076][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 20.405799][ T304] Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 13 44 2a fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f5 43 2a fe 48 8b 1b 48 83 c3 68 [ 20.425401][ T304] RSP: 0018:ffff8881dd617a90 EFLAGS: 00010206 [ 20.431439][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881df745e80 [ 20.439401][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 20.447386][ T304] RBP: ffff8881dd617ae0 R08: ffffffff83625ac3 R09: ffff8881dd617b70 [ 20.455356][ T304] R10: ffffed103bac2f70 R11: 1ffff1103bac2f6e R12: dffffc0000000000 [ 20.463305][ T304] R13: 0000000000008000 R14: ffff8881e04f5012 R15: ffff8881e04f52a0 [ 20.471272][ T304] FS: 000055555715f300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 20.480196][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.486770][ T304] CR2: 0000000000c55258 CR3: 00000001dd545000 CR4: 00000000003406f0 [ 20.494742][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.502692][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.510650][ T304] Kernel panic - not syncing: Fatal exception [ 20.516874][ T304] Kernel Offset: disabled [ 20.521204][ T304] Rebooting in 86400 seconds..