[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.411776] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.133348] random: sshd: uninitialized urandom read (32 bytes read) [ 28.361656] random: sshd: uninitialized urandom read (32 bytes read) [ 28.879919] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.210' (ECDSA) to the list of known hosts. [ 34.539582] urandom_read: 1 callbacks suppressed [ 34.539588] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.644690] ------------[ cut here ]------------ [ 34.649534] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 34.649706] WARNING: CPU: 1 PID: 4653 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.665774] Kernel panic - not syncing: panic_on_warn set ... [ 34.665774] [ 34.673120] CPU: 1 PID: 4653 Comm: syz-executor716 Not tainted 4.19.0-rc1+ #117 [ 34.680553] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.689887] Call Trace: [ 34.692460] dump_stack+0x1c9/0x2b4 [ 34.696085] ? dump_stack_print_info.cold.2+0x52/0x52 [ 34.701271] panic+0x238/0x4e7 [ 34.704447] ? add_taint.cold.5+0x16/0x16 [ 34.708580] ? __warn.cold.8+0x148/0x1ba [ 34.712622] ? __warn.cold.8+0x117/0x1ba [ 34.716704] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.721721] __warn.cold.8+0x163/0x1ba [ 34.725597] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.730601] report_bug+0x252/0x2d0 [ 34.734218] do_error_trap+0x1fc/0x4d0 [ 34.738105] ? math_error+0x3e0/0x3e0 [ 34.741893] ? vprintk_default+0x28/0x30 [ 34.745940] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.750789] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.755788] ? printk+0xa7/0xcf [ 34.759054] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.763884] do_invalid_op+0x1b/0x20 [ 34.767585] invalid_op+0x14/0x20 [ 34.771025] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.776631] Code: c7 c7 c0 66 58 87 e8 0a 6c 0f fe 0f 0b e9 6c fe ff ff e8 de a8 44 fe 48 c7 c6 00 68 58 87 48 c7 c7 20 66 58 87 e8 eb 6b 0f fe <0f> 0b e9 3f fe ff ff 48 89 df e8 9c a6 83 fe e9 ed fe ff ff bb f4 [ 34.795513] RSP: 0018:ffff8801b8bfecc0 EFLAGS: 00010286 [ 34.800869] RAX: 0000000000000000 RBX: ffff8801b8bfee80 RCX: 0000000000000000 [ 34.808122] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 34.815381] RBP: ffff8801b8bfece0 R08: ffff8801b8ae4740 R09: ffffed003b623eca [ 34.822636] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 34.829900] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b8bfee80 [ 34.837179] ? vprintk_func+0x81/0x117 [ 34.841069] security_secid_to_secctx+0x63/0xc0 [ 34.845749] ctnetlink_conntrack_event+0x303/0x1470 [ 34.850755] ? ctnetlink_glue_build+0xc40/0xc40 [ 34.855418] ? lock_acquire+0x1e4/0x4f0 [ 34.859392] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 34.864743] ? print_usage_bug+0xc0/0xc0 [ 34.868812] ? __lock_is_held+0xb5/0x140 [ 34.872877] nf_conntrack_eventmask_report+0x55f/0x930 [ 34.878145] ? nf_ct_expect_register_notifier+0x250/0x250 [ 34.883694] ? mark_held_locks+0xc9/0x160 [ 34.887835] ? __local_bh_enable_ip+0x161/0x230 [ 34.892503] ? lockdep_hardirqs_on+0x421/0x5c0 [ 34.897073] nf_ct_delete+0x33c/0x5d0 [ 34.900865] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 34.905965] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 34.910881] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 34.915628] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 34.920212] ? nf_ct_alloc_hashtable+0x150/0x150 [ 34.924971] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 34.929275] ? find_held_lock+0x36/0x1c0 [ 34.933325] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 34.938239] ? graph_lock+0x170/0x170 [ 34.942050] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 34.946801] ? ctnetlink_glue_seqadj+0x90/0x90 [ 34.951374] ctnetlink_del_conntrack+0x66c/0x850 [ 34.956114] ? lock_downgrade+0x840/0x8f0 [ 34.960297] ? ctnetlink_dump_table+0x1590/0x1590 [ 34.965131] ? __lock_is_held+0xb5/0x140 [ 34.969201] ? ctnetlink_dump_table+0x1590/0x1590 [ 34.974034] nfnetlink_rcv_msg+0xd88/0x1070 [ 34.978346] ? nfnetlink_bind+0x3b0/0x3b0 [ 34.982481] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.988012] ? refcount_sub_and_test_checked+0x21a/0x350 [ 34.993450] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 34.998897] ? apparmor_cred_prepare+0x590/0x590 [ 35.003640] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.009176] netlink_rcv_skb+0x172/0x440 [ 35.013236] ? nfnetlink_bind+0x3b0/0x3b0 [ 35.017370] ? netlink_ack+0xbe0/0xbe0 [ 35.021247] ? __netlink_ns_capable+0x100/0x130 [ 35.025931] nfnetlink_rcv+0x1c0/0x4d0 [ 35.029816] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 35.034575] ? kasan_check_write+0x14/0x20 [ 35.038794] netlink_unicast+0x5a0/0x760 [ 35.042840] ? netlink_attachskb+0x9a0/0x9a0 [ 35.047235] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.052778] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.057780] netlink_sendmsg+0xa18/0xfc0 [ 35.061844] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 35.067062] ? netlink_unicast+0x760/0x760 [ 35.071302] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 35.076240] ? apparmor_socket_sendmsg+0x29/0x30 [ 35.080985] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.086508] ? security_socket_sendmsg+0x94/0xc0 [ 35.091252] ? netlink_unicast+0x760/0x760 [ 35.095473] sock_sendmsg+0xd5/0x120 [ 35.099199] ___sys_sendmsg+0x7fd/0x930 [ 35.103193] ? copy_msghdr_from_user+0x580/0x580 [ 35.107941] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 35.112780] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.118304] ? __fget_light+0x2f7/0x440 [ 35.122280] ? fget_raw+0x20/0x20 [ 35.125738] ? find_held_lock+0x36/0x1c0 [ 35.129788] ? __do_page_fault+0x620/0xe50 [ 35.134010] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.139530] ? sockfd_lookup_light+0xc5/0x160 [ 35.144011] __sys_sendmsg+0x11d/0x290 [ 35.147885] ? __ia32_sys_shutdown+0x80/0x80 [ 35.152305] ? do_fast_syscall_32+0x150/0xfb2 [ 35.156796] ? do_fast_syscall_32+0x150/0xfb2 [ 35.161278] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 35.166368] ? mm_fault_error+0x380/0x380 [ 35.170508] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 35.175250] do_fast_syscall_32+0x34d/0xfb2 [ 35.179561] ? do_int80_syscall_32+0x890/0x890 [ 35.184129] ? entry_SYSENTER_compat+0x68/0x7f [ 35.188699] ? trace_hardirqs_off_caller+0xbb/0x2b0 [ 35.193705] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.198539] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.203368] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 35.208370] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 35.213371] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.218909] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.223925] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.228762] entry_SYSENTER_compat+0x70/0x7f [ 35.233158] RIP: 0023:0xf7f75ca9 [ 35.236537] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 35.255422] RSP: 002b:00000000ffbc50ac EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 35.263130] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020d65000 [ 35.270419] RDX: 0000000000000000 RSI: 00000000ffbc51f4 RDI: 00000000ffbc51fc [ 35.277670] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 35.284926] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.292202] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 35.299962] Dumping ftrace buffer: [ 35.303564] (ftrace buffer empty) [ 35.307257] Kernel Offset: disabled [ 35.310903] Rebooting in 86400 seconds..