[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.148066] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.250399] random: sshd: uninitialized urandom read (32 bytes read) [ 28.523985] random: sshd: uninitialized urandom read (32 bytes read) [ 29.050520] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. [ 34.765120] urandom_read: 1 callbacks suppressed [ 34.765127] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.871084] ------------[ cut here ]------------ [ 34.875986] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 34.876141] WARNING: CPU: 0 PID: 4656 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.892233] Kernel panic - not syncing: panic_on_warn set ... [ 34.892233] [ 34.899588] CPU: 0 PID: 4656 Comm: syz-executor289 Not tainted 4.19.0-rc1+ #214 [ 34.907016] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.916356] Call Trace: [ 34.918950] dump_stack+0x1c9/0x2b4 [ 34.922586] ? dump_stack_print_info.cold.2+0x52/0x52 [ 34.927765] panic+0x238/0x4e7 [ 34.930943] ? add_taint.cold.5+0x16/0x16 [ 34.935077] ? __warn.cold.8+0x148/0x1ba [ 34.939120] ? __warn.cold.8+0x117/0x1ba [ 34.943173] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.948178] __warn.cold.8+0x163/0x1ba [ 34.952060] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.957083] report_bug+0x252/0x2d0 [ 34.960705] do_error_trap+0x1fc/0x4d0 [ 34.964602] ? math_error+0x3e0/0x3e0 [ 34.968396] ? vprintk_default+0x28/0x30 [ 34.972475] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.977393] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.982398] ? printk+0xa7/0xcf [ 34.985670] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.990507] do_invalid_op+0x1b/0x20 [ 34.994237] invalid_op+0x14/0x20 [ 34.997704] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 35.003664] 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 [ 35.022570] RSP: 0018:ffff8801b80a6d10 EFLAGS: 00010286 [ 35.027927] RAX: 0000000000000000 RBX: ffff8801b80a6ed0 RCX: 0000000000000000 [ 35.035181] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 35.042451] RBP: ffff8801b80a6d30 R08: ffff8801b8616780 R09: ffffed003b603eca [ 35.049716] R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 [ 35.056967] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b80a6ed0 [ 35.064242] ? vprintk_func+0x81/0x117 [ 35.068123] security_secid_to_secctx+0x63/0xc0 [ 35.072801] ctnetlink_conntrack_event+0x303/0x1470 [ 35.077804] ? trace_hardirqs_on_caller+0xc0/0x2b0 [ 35.082737] ? ctnetlink_glue_build+0xc40/0xc40 [ 35.087393] ? lock_acquire+0x1e4/0x4f0 [ 35.091353] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 35.096706] ? __lock_is_held+0xb5/0x140 [ 35.100786] nf_conntrack_eventmask_report+0x55f/0x930 [ 35.106054] ? nf_ct_expect_register_notifier+0x250/0x250 [ 35.111579] ? mark_held_locks+0xc9/0x160 [ 35.115715] ? __local_bh_enable_ip+0x161/0x230 [ 35.120368] ? lockdep_hardirqs_on+0x421/0x5c0 [ 35.124938] nf_ct_delete+0x33c/0x5d0 [ 35.128723] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 35.133812] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 35.138731] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 35.143493] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 35.148064] ? nf_ct_alloc_hashtable+0x150/0x150 [ 35.152807] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 35.157112] ? find_held_lock+0x36/0x1c0 [ 35.161162] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 35.166080] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 35.170834] ? ctnetlink_glue_seqadj+0x90/0x90 [ 35.175415] ctnetlink_del_conntrack+0x66c/0x850 [ 35.180158] ? lock_downgrade+0x840/0x8f0 [ 35.184292] ? ctnetlink_dump_table+0x1590/0x1590 [ 35.189124] ? __lock_is_held+0xb5/0x140 [ 35.193180] ? ctnetlink_dump_table+0x1590/0x1590 [ 35.198016] nfnetlink_rcv_msg+0xd88/0x1070 [ 35.202335] ? nfnetlink_bind+0x3b0/0x3b0 [ 35.206473] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.211995] ? refcount_sub_and_test_checked+0x21a/0x350 [ 35.217431] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 35.222898] ? apparmor_cred_prepare+0x590/0x590 [ 35.227641] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.233165] netlink_rcv_skb+0x172/0x440 [ 35.237227] ? nfnetlink_bind+0x3b0/0x3b0 [ 35.241367] ? netlink_ack+0xbe0/0xbe0 [ 35.245247] ? __netlink_ns_capable+0x100/0x130 [ 35.249907] nfnetlink_rcv+0x1c0/0x4d0 [ 35.253780] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 35.258525] ? kasan_check_write+0x14/0x20 [ 35.262853] netlink_unicast+0x5a0/0x760 [ 35.266908] ? netlink_attachskb+0x9a0/0x9a0 [ 35.271323] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.276874] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.281881] netlink_sendmsg+0xa18/0xfc0 [ 35.285930] ? netlink_unicast+0x760/0x760 [ 35.290152] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 35.295069] ? apparmor_socket_sendmsg+0x29/0x30 [ 35.299813] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.305336] ? security_socket_sendmsg+0x94/0xc0 [ 35.310075] ? netlink_unicast+0x760/0x760 [ 35.314298] sock_sendmsg+0xd5/0x120 [ 35.317998] ___sys_sendmsg+0x7fd/0x930 [ 35.321959] ? copy_msghdr_from_user+0x580/0x580 [ 35.326700] ? graph_lock+0x170/0x170 [ 35.330489] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.336013] ? __fget_light+0x2f7/0x440 [ 35.339971] ? fget_raw+0x20/0x20 [ 35.343414] ? __do_page_fault+0x620/0xe50 [ 35.347636] ? lock_downgrade+0x8f0/0x8f0 [ 35.351772] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.357296] ? sockfd_lookup_light+0xc5/0x160 [ 35.361781] __sys_sendmsg+0x11d/0x290 [ 35.365678] ? __ia32_sys_shutdown+0x80/0x80 [ 35.370077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.375607] ? __do_page_fault+0x449/0xe50 [ 35.379834] ? do_syscall_64+0x9a/0x820 [ 35.383796] ? do_syscall_64+0x9a/0x820 [ 35.387759] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 35.392856] __x64_sys_sendmsg+0x78/0xb0 [ 35.396905] do_syscall_64+0x1b9/0x820 [ 35.400779] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 35.406128] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.411052] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.415911] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 35.420917] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 35.425921] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.431444] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.436444] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.441274] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.446446] RIP: 0033:0x441189 [ 35.449630] 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 [ 35.468519] RSP: 002b:00007fff24c58d68 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 35.476237] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441189 [ 35.483491] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000004 [ 35.490766] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 35.498021] R10: 00000000004002c8 R11: 0000000000000217 R12: 00000000004020d0 [ 35.505299] R13: 0000000000402160 R14: 0000000000000000 R15: 0000000000000000 [ 35.513114] Dumping ftrace buffer: [ 35.516721] (ftrace buffer empty) [ 35.520414] Kernel Offset: disabled [ 35.524023] Rebooting in 86400 seconds..