./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor299631052 <...> forked to background, child pid 192 Starting sshd: OK syzkaller syzkaller login: [ 16.948648][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 16.948654][ T22] audit: type=1400 audit(1652369729.380:71): 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 [ 16.954851][ T22] audit: type=1400 audit(1652369729.380:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[10778]" dev="pipefs" ino=10778 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 17.672346][ T266] sshd (266) used greatest stack depth: 26944 bytes left Warning: Permanently added '10.128.1.178' (ECDSA) to the list of known hosts. execve("./syz-executor299631052", ["./syz-executor299631052"], 0x7ffc4ff63d40 /* 10 vars */) = 0 brk(NULL) = 0x555556514000 brk(0x555556514c40) = 0x555556514c40 arch_prctl(ARCH_SET_FS, 0x555556514300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor299631052", 4096) = 27 brk(0x555556535c40) = 0x555556535c40 brk(0x555556536000) = 0x555556536000 mprotect(0x7fc8b8fec000, 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 [ 23.975727][ T22] audit: type=1400 audit(1652369736.400:73): avc: denied { execmem } for pid=304 comm="syz-executor299" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 23.995206][ T22] audit: type=1400 audit(1652369736.410:74): avc: denied { prog_load } for pid=304 comm="syz-executor299" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 23.995958][ T304] kasan: CONFIG_KASAN_INLINE enabled [ 24.014431][ T22] audit: type=1400 audit(1652369736.420:75): avc: denied { prog_run } for pid=304 comm="syz-executor299" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=bpf permissive=1 [ 24.038800][ T304] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 24.046859][ T304] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 24.053768][ T304] CPU: 1 PID: 304 Comm: syz-executor299 Not tainted 5.4.180-syzkaller-00005-gb2ca0128d238 #0 [ 24.063877][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.073916][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 24.079603][ 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 [ 24.099176][ T304] RSP: 0018:ffff8881dda7fa90 EFLAGS: 00010206 [ 24.105207][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dda6af40 [ 24.113149][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 24.121091][ T304] RBP: ffff8881dda7fae0 R08: ffffffff83625ac3 R09: ffff8881dda7fb70 [ 24.129038][ T304] R10: ffffed103bb4ff70 R11: 1ffff1103bb4ff6e R12: dffffc0000000000 [ 24.136988][ T304] R13: 0000000000008000 R14: ffff8881e25c6012 R15: ffff8881e25c62a0 [ 24.145813][ T304] FS: 0000555556514300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.154723][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.161288][ T304] CR2: 0000000001914258 CR3: 00000001e2fcc000 CR4: 00000000003406e0 [ 24.169242][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.177279][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.185230][ T304] Call Trace: [ 24.188499][ T304] ? bpf_test_run+0x260/0x640 [ 24.193148][ T304] ? bpf_prog_test_run_skb+0x7a2/0xf00 [ 24.198582][ T304] ? __bpf_trace_bpf_test_finish+0x20/0x20 [ 24.204365][ T304] ? __se_sys_bpf+0x2b7b/0xb990 [ 24.209272][ T304] ? __schedule+0x8d3/0xfc0 [ 24.213754][ T304] ? cgroup_update_frozen+0x139/0x360 [ 24.219092][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 24.224169][ T304] ? _raw_spin_lock_irq+0x6d/0x170 [ 24.229250][ T304] ? ptrace_stop+0x6eb/0xa30 [ 24.233810][ T304] ? syscall_trace_enter+0x5c2/0x860 [ 24.239065][ T304] ? check_preemption_disabled+0xde/0x2c0 [ 24.244758][ T304] ? do_syscall_64+0xcb/0x1c0 [ 24.249489][ T304] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 24.255519][ T304] Modules linked in: [ 24.259430][ T304] ---[ end trace 459a933a507aa508 ]--- [ 24.264868][ T304] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 [ 24.270584][ 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 [ 24.290195][ T304] RSP: 0018:ffff8881dda7fa90 EFLAGS: 00010206 [ 24.296263][ T304] RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dda6af40 [ 24.304301][ T304] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 [ 24.312294][ T304] RBP: ffff8881dda7fae0 R08: ffffffff83625ac3 R09: ffff8881dda7fb70 [ 24.320271][ T304] R10: ffffed103bb4ff70 R11: 1ffff1103bb4ff6e R12: dffffc0000000000 [ 24.328231][ T304] R13: 0000000000008000 R14: ffff8881e25c6012 R15: ffff8881e25c62a0 [ 24.336287][ T304] FS: 0000555556514300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.345182][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.351753][ T304] CR2: 0000000001914258 CR3: 00000001e2fcc000 CR4: 00000000003406e0 [ 24.359720][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.367679][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.375626][ T304] Kernel panic - not syncing: Fatal exception [ 24.381898][ T304] Kernel Offset: disabled [ 24.386196][ T304] Rebooting in 86400 seconds..