[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.491893] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.866645] random: sshd: uninitialized urandom read (32 bytes read) [ 27.161597] random: sshd: uninitialized urandom read (32 bytes read) [ 27.707562] random: sshd: uninitialized urandom read (32 bytes read) [ 27.886596] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. [ 33.429314] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.533620] ------------[ cut here ]------------ [ 33.538588] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 33.538728] WARNING: CPU: 1 PID: 4660 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.554792] Kernel panic - not syncing: panic_on_warn set ... [ 33.554792] [ 33.562132] CPU: 1 PID: 4660 Comm: syz-executor305 Not tainted 4.19.0-rc1-next-20180829+ #51 [ 33.570697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.580026] Call Trace: [ 33.582594] dump_stack+0x1c9/0x2b4 [ 33.586202] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.591376] panic+0x238/0x4e7 [ 33.594550] ? add_taint.cold.5+0x16/0x16 [ 33.598681] ? __warn.cold.8+0x148/0x1ba [ 33.602723] ? __warn.cold.8+0x117/0x1ba [ 33.606876] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.611878] __warn.cold.8+0x163/0x1ba [ 33.615747] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.620748] report_bug+0x252/0x2d0 [ 33.624369] do_error_trap+0x1fc/0x4d0 [ 33.628241] ? math_error+0x3e0/0x3e0 [ 33.632026] ? vprintk_default+0x28/0x30 [ 33.636071] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.640895] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.645892] ? printk+0xa7/0xcf [ 33.649155] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.653979] do_invalid_op+0x1b/0x20 [ 33.657677] invalid_op+0x14/0x20 [ 33.661112] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.666720] Code: c7 c7 a0 a2 58 87 e8 7a a0 0d fe 0f 0b e9 6c fe ff ff e8 9e e7 42 fe 48 c7 c6 e0 a3 58 87 48 c7 c7 00 a2 58 87 e8 5b a0 0d fe <0f> 0b e9 3f fe ff ff 48 89 df e8 1c f6 81 fe e9 ed fe ff ff bb f4 [ 33.685809] RSP: 0018:ffff8801b6066d10 EFLAGS: 00010286 [ 33.691256] RAX: 0000000000000000 RBX: ffff8801b6066ed0 RCX: 0000000000000000 [ 33.698508] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 33.705758] RBP: ffff8801b6066d30 R08: ffff8801d941c740 R09: ffffed003b623eca [ 33.713008] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 33.720254] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b6066ed0 [ 33.727521] ? vprintk_func+0x81/0x117 [ 33.731486] security_secid_to_secctx+0x63/0xc0 [ 33.736149] ctnetlink_conntrack_event+0x303/0x1470 [ 33.741324] ? ctnetlink_glue_build+0xc40/0xc40 [ 33.745990] ? lock_acquire+0x1e4/0x4f0 [ 33.749954] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 33.755303] ? __lock_is_held+0xb5/0x140 [ 33.759419] nf_conntrack_eventmask_report+0x55f/0x930 [ 33.764691] ? nf_ct_expect_register_notifier+0x250/0x250 [ 33.770207] ? mark_held_locks+0xc9/0x160 [ 33.774337] ? __local_bh_enable_ip+0x161/0x230 [ 33.778999] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.783569] nf_ct_delete+0x33c/0x5d0 [ 33.787357] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.792442] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 33.797420] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 33.802167] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 33.806731] ? nf_ct_alloc_hashtable+0x150/0x150 [ 33.811468] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 33.815780] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 33.820695] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 33.825436] ? ctnetlink_glue_seqadj+0x90/0x90 [ 33.830075] ctnetlink_del_conntrack+0x66c/0x850 [ 33.834820] ? lock_downgrade+0x840/0x8f0 [ 33.839070] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.843901] ? __lock_is_held+0xb5/0x140 [ 33.847948] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.852772] nfnetlink_rcv_msg+0xd88/0x1070 [ 33.857079] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.861210] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.866732] ? refcount_sub_and_test_checked+0x21a/0x350 [ 33.872168] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 33.877610] ? apparmor_cred_prepare+0x590/0x590 [ 33.882353] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.887886] netlink_rcv_skb+0x172/0x440 [ 33.892001] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.896146] ? netlink_ack+0xbe0/0xbe0 [ 33.900022] ? __netlink_ns_capable+0x100/0x130 [ 33.904673] nfnetlink_rcv+0x1c0/0x4d0 [ 33.908546] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 33.913288] ? kasan_check_write+0x14/0x20 [ 33.917509] netlink_unicast+0x5a0/0x760 [ 33.921555] ? netlink_attachskb+0x9a0/0x9a0 [ 33.925947] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.931466] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 33.936465] netlink_sendmsg+0xa18/0xfc0 [ 33.940510] ? netlink_unicast+0x760/0x760 [ 33.944731] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 33.949647] ? apparmor_socket_sendmsg+0x29/0x30 [ 33.954389] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.959920] ? security_socket_sendmsg+0x94/0xc0 [ 33.964661] ? netlink_unicast+0x760/0x760 [ 33.968885] sock_sendmsg+0xd5/0x120 [ 33.972580] ___sys_sendmsg+0x7fd/0x930 [ 33.976537] ? copy_msghdr_from_user+0x580/0x580 [ 33.981272] ? graph_lock+0x170/0x170 [ 33.985068] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.990598] ? __fget_light+0x2f7/0x440 [ 33.994561] ? fget_raw+0x20/0x20 [ 33.998000] ? __do_page_fault+0x620/0xe50 [ 34.002217] ? lock_downgrade+0x8f0/0x8f0 [ 34.006367] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.011895] ? sockfd_lookup_light+0xc5/0x160 [ 34.016376] __sys_sendmsg+0x11d/0x290 [ 34.020316] ? __ia32_sys_shutdown+0x80/0x80 [ 34.024722] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.030285] ? __do_page_fault+0x449/0xe50 [ 34.034513] ? do_syscall_64+0x9a/0x820 [ 34.038468] ? do_syscall_64+0x9a/0x820 [ 34.042430] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 34.047517] __x64_sys_sendmsg+0x78/0xb0 [ 34.051559] do_syscall_64+0x1b9/0x820 [ 34.055432] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.060786] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.065699] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.070523] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.075523] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.080520] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.086037] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.091081] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.095927] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.101100] RIP: 0033:0x440fe9 [ 34.104277] 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 [ 34.123161] RSP: 002b:00007ffd1fc9ac28 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 34.130855] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440fe9 [ 34.138108] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 34.145447] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 34.152702] R10: 000000000132f880 R11: 0000000000000213 R12: 0000000000401f30 [ 34.159955] R13: 0000000000401fc0 R14: 0000000000000000 R15: 0000000000000000 [ 34.167631] Dumping ftrace buffer: [ 34.171228] (ftrace buffer empty) [ 34.174922] Kernel Offset: disabled [ 34.178534] Rebooting in 86400 seconds..