[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.406816] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.980264] random: sshd: uninitialized urandom read (32 bytes read) [ 26.290586] random: sshd: uninitialized urandom read (32 bytes read) [ 26.863907] random: sshd: uninitialized urandom read (32 bytes read) [ 27.045571] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.199' (ECDSA) to the list of known hosts. [ 32.746648] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 32.848245] ------------[ cut here ]------------ [ 32.853198] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 32.853412] WARNING: CPU: 0 PID: 4731 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.869497] Kernel panic - not syncing: panic_on_warn set ... [ 32.869497] [ 32.876859] CPU: 0 PID: 4731 Comm: syz-executor823 Not tainted 4.19.0-rc1+ #214 [ 32.884291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.893641] Call Trace: [ 32.896243] dump_stack+0x1c9/0x2b4 [ 32.899860] ? dump_stack_print_info.cold.2+0x52/0x52 [ 32.905041] panic+0x238/0x4e7 [ 32.908219] ? add_taint.cold.5+0x16/0x16 [ 32.912370] ? __warn.cold.8+0x148/0x1ba [ 32.916424] ? __warn.cold.8+0x117/0x1ba [ 32.920478] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.925478] __warn.cold.8+0x163/0x1ba [ 32.929359] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.934363] report_bug+0x252/0x2d0 [ 32.938001] do_error_trap+0x1fc/0x4d0 [ 32.941874] ? math_error+0x3e0/0x3e0 [ 32.945670] ? vprintk_default+0x28/0x30 [ 32.949755] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.954605] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 32.959672] ? printk+0xa7/0xcf [ 32.962940] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 32.967770] do_invalid_op+0x1b/0x20 [ 32.971472] invalid_op+0x14/0x20 [ 32.974915] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 32.980524] 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 [ 32.999411] RSP: 0018:ffff8801d900ed10 EFLAGS: 00010286 [ 33.004759] RAX: 0000000000000000 RBX: ffff8801d900eed0 RCX: 0000000000000000 [ 33.012012] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 33.019276] RBP: ffff8801d900ed30 R08: ffff8801d96003c0 R09: ffffed003b603eca [ 33.026554] R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 [ 33.033839] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801d900eed0 [ 33.041112] ? vprintk_func+0x81/0x117 [ 33.044997] security_secid_to_secctx+0x63/0xc0 [ 33.049702] ctnetlink_conntrack_event+0x303/0x1470 [ 33.054705] ? ctnetlink_glue_build+0xc40/0xc40 [ 33.059366] ? lock_acquire+0x1e4/0x4f0 [ 33.063341] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 33.068755] ? __lock_is_held+0xb5/0x140 [ 33.072849] nf_conntrack_eventmask_report+0x55f/0x930 [ 33.078126] ? nf_ct_expect_register_notifier+0x250/0x250 [ 33.083684] ? mark_held_locks+0xc9/0x160 [ 33.087827] ? __local_bh_enable_ip+0x161/0x230 [ 33.092532] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.097132] nf_ct_delete+0x33c/0x5d0 [ 33.100929] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.106016] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 33.110942] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 33.115686] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 33.120255] ? nf_ct_alloc_hashtable+0x150/0x150 [ 33.124999] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 33.129331] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 33.134287] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 33.139054] ? ctnetlink_glue_seqadj+0x90/0x90 [ 33.143631] ctnetlink_del_conntrack+0x66c/0x850 [ 33.148376] ? lock_downgrade+0x840/0x8f0 [ 33.152529] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.157370] ? __lock_is_held+0xb5/0x140 [ 33.161420] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.166286] nfnetlink_rcv_msg+0xd88/0x1070 [ 33.170620] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.174771] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.180315] ? refcount_sub_and_test_checked+0x21a/0x350 [ 33.185761] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 33.191215] ? apparmor_cred_prepare+0x590/0x590 [ 33.195956] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.201515] netlink_rcv_skb+0x172/0x440 [ 33.205588] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.209747] ? netlink_ack+0xbe0/0xbe0 [ 33.213631] ? __netlink_ns_capable+0x100/0x130 [ 33.218298] nfnetlink_rcv+0x1c0/0x4d0 [ 33.222213] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 33.226959] ? kasan_check_write+0x14/0x20 [ 33.231181] netlink_unicast+0x5a0/0x760 [ 33.235228] ? netlink_attachskb+0x9a0/0x9a0 [ 33.239621] ? netlink_sendmsg+0x74f/0xfc0 [ 33.243844] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 33.248856] netlink_sendmsg+0xa18/0xfc0 [ 33.252908] ? netlink_unicast+0x760/0x760 [ 33.257156] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 33.262263] ? apparmor_socket_sendmsg+0x29/0x30 [ 33.267024] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.272546] ? security_socket_sendmsg+0x94/0xc0 [ 33.277310] ? netlink_unicast+0x760/0x760 [ 33.281600] sock_sendmsg+0xd5/0x120 [ 33.285316] ___sys_sendmsg+0x7fd/0x930 [ 33.289306] ? copy_msghdr_from_user+0x580/0x580 [ 33.294062] ? __switch_to_asm+0x40/0x70 [ 33.298115] ? graph_lock+0x170/0x170 [ 33.301906] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.307437] ? __fget_light+0x2f7/0x440 [ 33.311424] ? fget_raw+0x20/0x20 [ 33.314881] ? __do_page_fault+0x620/0xe50 [ 33.319107] ? lock_downgrade+0x8f0/0x8f0 [ 33.323267] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.328802] ? sockfd_lookup_light+0xc5/0x160 [ 33.333293] __sys_sendmsg+0x11d/0x290 [ 33.337193] ? __ia32_sys_shutdown+0x80/0x80 [ 33.341593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.347120] ? __do_page_fault+0x449/0xe50 [ 33.351352] ? __schedule+0x1df0/0x1df0 [ 33.355335] ? do_syscall_64+0x9a/0x820 [ 33.359328] ? do_syscall_64+0x9a/0x820 [ 33.363332] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.368441] __x64_sys_sendmsg+0x78/0xb0 [ 33.372502] do_syscall_64+0x1b9/0x820 [ 33.376390] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 33.381738] ? syscall_return_slowpath+0x5e0/0x5e0 [ 33.386658] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.391491] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.396507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.402067] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.407112] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.411943] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.417119] RIP: 0033:0x440f19 [ 33.420308] 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 [ 33.439234] RSP: 002b:00007ffc31e2e198 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 33.446963] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440f19 [ 33.454217] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 33.461492] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 33.468759] R10: 000000000148e880 R11: 0000000000000213 R12: 0000000000401e60 [ 33.476011] R13: 0000000000401ef0 R14: 0000000000000000 R15: 0000000000000000 [ 33.483758] Dumping ftrace buffer: [ 33.487372] (ftrace buffer empty) [ 33.491072] Kernel Offset: disabled [ 33.494690] Rebooting in 86400 seconds..