[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.348214] 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: [ 26.709390] random: sshd: uninitialized urandom read (32 bytes read) [ 27.286264] random: sshd: uninitialized urandom read (32 bytes read) [ 27.838721] random: sshd: uninitialized urandom read (32 bytes read) [ 28.005349] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. [ 46.089172] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 46.195797] ------------[ cut here ]------------ [ 46.200682] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 46.200883] WARNING: CPU: 0 PID: 4651 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 46.217151] Kernel panic - not syncing: panic_on_warn set ... [ 46.217151] [ 46.224503] CPU: 0 PID: 4651 Comm: syz-executor352 Not tainted 4.19.0-rc1+ #118 [ 46.232000] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.241410] Call Trace: [ 46.244013] dump_stack+0x1c9/0x2b4 [ 46.247632] ? dump_stack_print_info.cold.2+0x52/0x52 [ 46.252814] panic+0x238/0x4e7 [ 46.256008] ? add_taint.cold.5+0x16/0x16 [ 46.260144] ? __warn.cold.8+0x148/0x1ba [ 46.264189] ? __warn.cold.8+0x117/0x1ba [ 46.268489] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 46.273495] __warn.cold.8+0x163/0x1ba [ 46.277372] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 46.282634] report_bug+0x252/0x2d0 [ 46.286329] do_error_trap+0x1fc/0x4d0 [ 46.290222] ? math_error+0x3e0/0x3e0 [ 46.294022] ? vprintk_default+0x28/0x30 [ 46.298086] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.302927] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 46.307944] ? printk+0xa7/0xcf [ 46.311216] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.316045] do_invalid_op+0x1b/0x20 [ 46.319757] invalid_op+0x14/0x20 [ 46.323218] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 46.328834] 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 [ 46.347731] RSP: 0018:ffff8801b9a5ecc0 EFLAGS: 00010286 [ 46.353104] RAX: 0000000000000000 RBX: ffff8801b9a5ee80 RCX: 0000000000000000 [ 46.360364] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 46.367628] RBP: ffff8801b9a5ece0 R08: ffff8801b9510340 R09: ffffed003b603eca [ 46.374908] R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 [ 46.382277] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b9a5ee80 [ 46.389546] ? vprintk_func+0x81/0x117 [ 46.393485] security_secid_to_secctx+0x63/0xc0 [ 46.398148] ctnetlink_conntrack_event+0x303/0x1470 [ 46.403289] ? ctnetlink_glue_build+0xc40/0xc40 [ 46.407990] ? lock_acquire+0x1e4/0x4f0 [ 46.411957] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 46.417309] ? __switch_to_asm+0x40/0x70 [ 46.421358] ? __switch_to_asm+0x34/0x70 [ 46.425407] ? __lock_is_held+0xb5/0x140 [ 46.429460] nf_conntrack_eventmask_report+0x55f/0x930 [ 46.434735] ? nf_ct_expect_register_notifier+0x250/0x250 [ 46.440270] ? mark_held_locks+0xc9/0x160 [ 46.444406] ? __local_bh_enable_ip+0x161/0x230 [ 46.449069] ? lockdep_hardirqs_on+0x421/0x5c0 [ 46.453655] nf_ct_delete+0x33c/0x5d0 [ 46.457442] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 46.462533] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 46.467469] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 46.472221] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 46.476798] ? nf_ct_alloc_hashtable+0x150/0x150 [ 46.481551] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 46.485910] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 46.490846] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 46.495589] ? ctnetlink_glue_seqadj+0x90/0x90 [ 46.500164] ctnetlink_del_conntrack+0x66c/0x850 [ 46.504904] ? lock_downgrade+0x840/0x8f0 [ 46.509033] ? ctnetlink_dump_table+0x1590/0x1590 [ 46.513859] ? __lock_is_held+0xb5/0x140 [ 46.517904] ? ctnetlink_dump_table+0x1590/0x1590 [ 46.522734] nfnetlink_rcv_msg+0xd88/0x1070 [ 46.527069] ? nfnetlink_bind+0x3b0/0x3b0 [ 46.531211] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.536739] ? refcount_sub_and_test_checked+0x21a/0x350 [ 46.542189] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 46.547635] ? apparmor_cred_prepare+0x590/0x590 [ 46.552431] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.557997] netlink_rcv_skb+0x172/0x440 [ 46.562043] ? nfnetlink_bind+0x3b0/0x3b0 [ 46.566184] ? netlink_ack+0xbe0/0xbe0 [ 46.570059] ? __netlink_ns_capable+0x100/0x130 [ 46.574714] nfnetlink_rcv+0x1c0/0x4d0 [ 46.578588] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 46.583348] ? kasan_check_write+0x14/0x20 [ 46.587569] netlink_unicast+0x5a0/0x760 [ 46.591623] ? netlink_attachskb+0x9a0/0x9a0 [ 46.596018] ? netlink_sendmsg+0x74f/0xfc0 [ 46.600239] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.605405] netlink_sendmsg+0xa18/0xfc0 [ 46.609472] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 46.614802] ? netlink_unicast+0x760/0x760 [ 46.619054] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 46.623970] ? apparmor_socket_sendmsg+0x29/0x30 [ 46.628714] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.634295] ? security_socket_sendmsg+0x94/0xc0 [ 46.639043] ? netlink_unicast+0x760/0x760 [ 46.643269] sock_sendmsg+0xd5/0x120 [ 46.647002] ___sys_sendmsg+0x7fd/0x930 [ 46.650970] ? copy_msghdr_from_user+0x580/0x580 [ 46.655716] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 46.660633] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.666166] ? __fget_light+0x2f7/0x440 [ 46.670133] ? fget_raw+0x20/0x20 [ 46.673574] ? find_held_lock+0x36/0x1c0 [ 46.677632] ? __do_page_fault+0x620/0xe50 [ 46.682018] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.687546] ? sockfd_lookup_light+0xc5/0x160 [ 46.692033] __sys_sendmsg+0x11d/0x290 [ 46.696106] ? __ia32_sys_shutdown+0x80/0x80 [ 46.700513] ? do_fast_syscall_32+0x150/0xfb2 [ 46.705007] ? do_fast_syscall_32+0x150/0xfb2 [ 46.709492] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 46.714587] ? mm_fault_error+0x380/0x380 [ 46.718726] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 46.723475] do_fast_syscall_32+0x34d/0xfb2 [ 46.727794] ? do_int80_syscall_32+0x890/0x890 [ 46.732364] ? entry_SYSENTER_compat+0x68/0x7f [ 46.736940] ? trace_hardirqs_off_caller+0xbb/0x2b0 [ 46.741940] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.746815] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.751656] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 46.756660] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.762193] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.767197] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.772116] entry_SYSENTER_compat+0x70/0x7f [ 46.776519] RIP: 0023:0xf7fd9ca9 [ 46.779935] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 46.798849] RSP: 002b:00000000fff7c3cc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 46.806540] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020d65000 [ 46.813792] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000fff7c638 [ 46.821050] RBP: 00000000fff7c42c R08: 0000000000000000 R09: 0000000000000000 [ 46.828308] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 46.835560] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 46.843267] Dumping ftrace buffer: [ 46.846873] (ftrace buffer empty) [ 46.850570] Kernel Offset: disabled [ 46.854181] Rebooting in 86400 seconds..