[....] 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[ 22.109147] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.836841] random: sshd: uninitialized urandom read (32 bytes read) [ 27.041142] random: sshd: uninitialized urandom read (32 bytes read) [ 27.596223] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.31' (ECDSA) to the list of known hosts. [ 33.474018] urandom_read: 1 callbacks suppressed [ 33.474025] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.579681] ------------[ cut here ]------------ [ 33.584567] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 33.584764] WARNING: CPU: 1 PID: 4666 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.600854] Kernel panic - not syncing: panic_on_warn set ... [ 33.600854] [ 33.608222] CPU: 1 PID: 4666 Comm: syz-executor089 Not tainted 4.19.0-rc1+ #76 [ 33.615577] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.624919] Call Trace: [ 33.627526] dump_stack+0x1c9/0x2b4 [ 33.631143] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.636328] panic+0x238/0x4e7 [ 33.639504] ? add_taint.cold.5+0x16/0x16 [ 33.643638] ? __warn.cold.8+0x148/0x1ba [ 33.647682] ? __warn.cold.8+0x117/0x1ba [ 33.651757] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.656794] __warn.cold.8+0x163/0x1ba [ 33.660672] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.665678] report_bug+0x252/0x2d0 [ 33.669295] do_error_trap+0x1fc/0x4d0 [ 33.673168] ? math_error+0x3e0/0x3e0 [ 33.676966] ? vprintk_default+0x28/0x30 [ 33.681051] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.685881] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.690900] ? printk+0xa7/0xcf [ 33.694169] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.698997] do_invalid_op+0x1b/0x20 [ 33.702698] invalid_op+0x14/0x20 [ 33.706150] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.711767] Code: c7 c7 40 66 58 87 e8 ba 6d 0f fe 0f 0b e9 6c fe ff ff e8 8e aa 44 fe 48 c7 c6 80 67 58 87 48 c7 c7 a0 65 58 87 e8 9b 6d 0f fe <0f> 0b e9 3f fe ff ff 48 89 df e8 fc a7 83 fe e9 ed fe ff ff bb f4 [ 33.730659] RSP: 0018:ffff8801b6576d10 EFLAGS: 00010286 [ 33.736040] RAX: 0000000000000000 RBX: ffff8801b6576ed0 RCX: 0000000000000000 [ 33.743322] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 33.750585] RBP: ffff8801b6576d30 R08: ffff8801b6420580 R09: ffffed003b623eca [ 33.757851] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 33.765120] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b6576ed0 [ 33.772393] ? vprintk_func+0x81/0x117 [ 33.776278] security_secid_to_secctx+0x63/0xc0 [ 33.780957] ctnetlink_conntrack_event+0x303/0x1470 [ 33.785967] ? ctnetlink_glue_build+0xc40/0xc40 [ 33.790626] ? lock_acquire+0x1e4/0x4f0 [ 33.794591] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 33.799964] ? __lock_is_held+0xb5/0x140 [ 33.804029] nf_conntrack_eventmask_report+0x55f/0x930 [ 33.809295] ? nf_ct_expect_register_notifier+0x250/0x250 [ 33.814821] ? mark_held_locks+0xc9/0x160 [ 33.818958] ? __local_bh_enable_ip+0x161/0x230 [ 33.823636] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.828214] nf_ct_delete+0x33c/0x5d0 [ 33.832008] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.837122] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 33.842045] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 33.846796] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 33.851378] ? nf_ct_alloc_hashtable+0x150/0x150 [ 33.856124] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 33.860447] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 33.865366] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 33.870108] ? ctnetlink_glue_seqadj+0x90/0x90 [ 33.874682] ctnetlink_del_conntrack+0x66c/0x850 [ 33.879430] ? lock_downgrade+0x840/0x8f0 [ 33.883563] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.888392] ? __lock_is_held+0xb5/0x140 [ 33.892443] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.897278] nfnetlink_rcv_msg+0xd88/0x1070 [ 33.901592] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.905747] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.911283] ? refcount_sub_and_test_checked+0x21a/0x350 [ 33.916730] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 33.922208] ? apparmor_cred_prepare+0x590/0x590 [ 33.926950] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.932476] netlink_rcv_skb+0x172/0x440 [ 33.936524] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.941439] ? netlink_ack+0xbe0/0xbe0 [ 33.945313] ? __netlink_ns_capable+0x100/0x130 [ 33.949969] nfnetlink_rcv+0x1c0/0x4d0 [ 33.953854] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 33.958619] ? kasan_check_write+0x14/0x20 [ 33.962849] netlink_unicast+0x5a0/0x760 [ 33.966903] ? netlink_attachskb+0x9a0/0x9a0 [ 33.971309] ? netlink_sendmsg+0x74f/0xfc0 [ 33.975534] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 33.980542] netlink_sendmsg+0xa18/0xfc0 [ 33.984590] ? netlink_unicast+0x760/0x760 [ 33.988813] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 33.993741] ? apparmor_socket_sendmsg+0x29/0x30 [ 33.998508] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.004032] ? security_socket_sendmsg+0x94/0xc0 [ 34.008778] ? netlink_unicast+0x760/0x760 [ 34.013023] sock_sendmsg+0xd5/0x120 [ 34.016769] ___sys_sendmsg+0x7fd/0x930 [ 34.020745] ? copy_msghdr_from_user+0x580/0x580 [ 34.025496] ? graph_lock+0x170/0x170 [ 34.029290] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.034815] ? __fget_light+0x2f7/0x440 [ 34.038780] ? fget_raw+0x20/0x20 [ 34.042226] ? __do_page_fault+0x620/0xe50 [ 34.046461] ? lock_downgrade+0x8f0/0x8f0 [ 34.050602] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.056129] ? sockfd_lookup_light+0xc5/0x160 [ 34.060619] __sys_sendmsg+0x11d/0x290 [ 34.064495] ? __ia32_sys_shutdown+0x80/0x80 [ 34.068894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.074419] ? __do_page_fault+0x449/0xe50 [ 34.078640] ? do_syscall_64+0x9a/0x820 [ 34.082601] ? do_syscall_64+0x9a/0x820 [ 34.086564] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 34.091657] __x64_sys_sendmsg+0x78/0xb0 [ 34.095708] do_syscall_64+0x1b9/0x820 [ 34.099597] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.104948] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.109895] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.114747] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.119775] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.124892] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.130425] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.135438] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.140286] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.145465] RIP: 0033:0x440f19 [ 34.148644] Code: e8 cc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.167577] RSP: 002b:00007fffb1cd1178 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 34.175291] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440f19 [ 34.182558] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 34.189835] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 34.197092] R10: 0000000000925880 R11: 0000000000000213 R12: 0000000000401e60 [ 34.204365] R13: 0000000000401ef0 R14: 0000000000000000 R15: 0000000000000000 [ 34.212159] Dumping ftrace buffer: [ 34.215781] (ftrace buffer empty) [ 34.219476] Kernel Offset: disabled [ 34.223091] Rebooting in 86400 seconds..