[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.363705] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 25.263765] random: sshd: uninitialized urandom read (32 bytes read) [ 25.563592] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.123723] random: sshd: uninitialized urandom read (32 bytes read) [ 26.306026] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. [ 32.054321] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 32.157363] ------------[ cut here ]------------ [ 32.162247] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 32.162405] WARNING: CPU: 0 PID: 4708 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.178477] Kernel panic - not syncing: panic_on_warn set ... [ 32.178477] [ 32.185839] CPU: 0 PID: 4708 Comm: syz-executor364 Not tainted 4.19.0-rc1+ #214 [ 32.193301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.202644] Call Trace: [ 32.205221] dump_stack+0x1c9/0x2b4 [ 32.208839] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.214035] panic+0x238/0x4e7 [ 32.217244] ? add_taint.cold.5+0x16/0x16 [ 32.221388] ? __warn.cold.8+0x148/0x1ba [ 32.225469] ? __warn.cold.8+0x117/0x1ba [ 32.229544] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.234560] __warn.cold.8+0x163/0x1ba [ 32.238440] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.243458] report_bug+0x252/0x2d0 [ 32.247072] do_error_trap+0x1fc/0x4d0 [ 32.250948] ? math_error+0x3e0/0x3e0 [ 32.254735] ? vprintk_default+0x28/0x30 [ 32.258782] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.263615] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 32.268668] ? printk+0xa7/0xcf [ 32.271965] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.276819] do_invalid_op+0x1b/0x20 [ 32.280538] invalid_op+0x14/0x20 [ 32.284000] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.289648] 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 [ 32.308562] RSP: 0018:ffff8801b8e96d10 EFLAGS: 00010286 [ 32.313948] RAX: 0000000000000000 RBX: ffff8801b8e96ed0 RCX: 0000000000000000 [ 32.321219] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 32.328727] RBP: ffff8801b8e96d30 R08: ffff8801b9306200 R09: ffffed003b603eca [ 32.335992] R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 [ 32.343246] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b8e96ed0 [ 32.350512] ? vprintk_func+0x81/0x117 [ 32.354404] security_secid_to_secctx+0x63/0xc0 [ 32.359060] ctnetlink_conntrack_event+0x303/0x1470 [ 32.364061] ? trace_hardirqs_on_caller+0xc0/0x2b0 [ 32.368989] ? ctnetlink_glue_build+0xc40/0xc40 [ 32.373643] ? lock_acquire+0x1e4/0x4f0 [ 32.377605] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 32.382978] ? __lock_is_held+0xb5/0x140 [ 32.387053] nf_conntrack_eventmask_report+0x55f/0x930 [ 32.392332] ? nf_ct_expect_register_notifier+0x250/0x250 [ 32.397857] ? mark_held_locks+0xc9/0x160 [ 32.402008] ? __local_bh_enable_ip+0x161/0x230 [ 32.406675] ? lockdep_hardirqs_on+0x421/0x5c0 [ 32.411286] nf_ct_delete+0x33c/0x5d0 [ 32.415074] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 32.420164] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 32.425107] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 32.429851] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 32.434431] ? nf_ct_alloc_hashtable+0x150/0x150 [ 32.439174] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 32.443501] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 32.448433] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 32.453227] ? ctnetlink_glue_seqadj+0x90/0x90 [ 32.457815] ctnetlink_del_conntrack+0x66c/0x850 [ 32.462573] ? lock_downgrade+0x840/0x8f0 [ 32.466710] ? ctnetlink_dump_table+0x1590/0x1590 [ 32.471546] ? __lock_is_held+0xb5/0x140 [ 32.475596] ? ctnetlink_dump_table+0x1590/0x1590 [ 32.480426] nfnetlink_rcv_msg+0xd88/0x1070 [ 32.484740] ? nfnetlink_bind+0x3b0/0x3b0 [ 32.488894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.494454] ? refcount_sub_and_test_checked+0x21a/0x350 [ 32.499904] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 32.505387] ? apparmor_cred_prepare+0x590/0x590 [ 32.510132] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.515659] netlink_rcv_skb+0x172/0x440 [ 32.519729] ? nfnetlink_bind+0x3b0/0x3b0 [ 32.523864] ? netlink_ack+0xbe0/0xbe0 [ 32.527755] ? __netlink_ns_capable+0x100/0x130 [ 32.532412] nfnetlink_rcv+0x1c0/0x4d0 [ 32.536286] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 32.541031] ? kasan_check_write+0x14/0x20 [ 32.545267] netlink_unicast+0x5a0/0x760 [ 32.549333] ? netlink_attachskb+0x9a0/0x9a0 [ 32.553735] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.559276] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 32.564283] netlink_sendmsg+0xa18/0xfc0 [ 32.568334] ? netlink_unicast+0x760/0x760 [ 32.572559] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 32.577484] ? apparmor_socket_sendmsg+0x29/0x30 [ 32.582241] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.587808] ? security_socket_sendmsg+0x94/0xc0 [ 32.592553] ? netlink_unicast+0x760/0x760 [ 32.596805] sock_sendmsg+0xd5/0x120 [ 32.600517] ___sys_sendmsg+0x7fd/0x930 [ 32.604509] ? copy_msghdr_from_user+0x580/0x580 [ 32.609254] ? graph_lock+0x170/0x170 [ 32.613046] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.618568] ? __fget_light+0x2f7/0x440 [ 32.622557] ? fget_raw+0x20/0x20 [ 32.626003] ? __do_page_fault+0x620/0xe50 [ 32.630234] ? lock_downgrade+0x8f0/0x8f0 [ 32.634377] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 32.639913] ? sockfd_lookup_light+0xc5/0x160 [ 32.644399] __sys_sendmsg+0x11d/0x290 [ 32.648279] ? __ia32_sys_shutdown+0x80/0x80 [ 32.652694] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.658232] ? __do_page_fault+0x449/0xe50 [ 32.662457] ? do_syscall_64+0x9a/0x820 [ 32.666418] ? do_syscall_64+0x9a/0x820 [ 32.670382] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 32.675506] __x64_sys_sendmsg+0x78/0xb0 [ 32.679581] do_syscall_64+0x1b9/0x820 [ 32.683456] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 32.688819] ? syscall_return_slowpath+0x5e0/0x5e0 [ 32.693754] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.698606] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 32.703643] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 32.708650] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 32.714201] ? prepare_exit_to_usermode+0x291/0x3b0 [ 32.719238] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.724071] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.729249] RIP: 0033:0x440fe9 [ 32.732429] 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 [ 32.751318] RSP: 002b:00007ffd5c9f3058 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 32.759021] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440fe9 [ 32.766297] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 32.773550] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 32.780822] R10: 0000000000898880 R11: 0000000000000213 R12: 0000000000401f30 [ 32.788112] R13: 0000000000401fc0 R14: 0000000000000000 R15: 0000000000000000 [ 32.795879] Dumping ftrace buffer: [ 32.799508] (ftrace buffer empty) [ 32.803203] Kernel Offset: disabled [ 32.806835] Rebooting in 86400 seconds..