[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.339419] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.588524] random: sshd: uninitialized urandom read (32 bytes read) [ 24.809742] random: sshd: uninitialized urandom read (32 bytes read) [ 25.384288] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts. [ 31.229440] urandom_read: 1 callbacks suppressed [ 31.229446] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 31.346827] ------------[ cut here ]------------ [ 31.351760] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 31.351910] WARNING: CPU: 0 PID: 4661 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 31.368008] Kernel panic - not syncing: panic_on_warn set ... [ 31.368008] [ 31.375371] CPU: 0 PID: 4661 Comm: syz-executor442 Not tainted 4.19.0-rc1+ #214 [ 31.382813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.392191] Call Trace: [ 31.394781] dump_stack+0x1c9/0x2b4 [ 31.398405] ? dump_stack_print_info.cold.2+0x52/0x52 [ 31.403584] panic+0x238/0x4e7 [ 31.406765] ? add_taint.cold.5+0x16/0x16 [ 31.410903] ? __warn.cold.8+0x148/0x1ba [ 31.414948] ? __warn.cold.8+0x117/0x1ba [ 31.419010] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 31.424021] __warn.cold.8+0x163/0x1ba [ 31.427901] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 31.432904] report_bug+0x252/0x2d0 [ 31.436518] do_error_trap+0x1fc/0x4d0 [ 31.440395] ? math_error+0x3e0/0x3e0 [ 31.444182] ? vprintk_default+0x28/0x30 [ 31.448228] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.453058] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 31.458064] ? printk+0xa7/0xcf [ 31.461347] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.466178] do_invalid_op+0x1b/0x20 [ 31.469892] invalid_op+0x14/0x20 [ 31.473339] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 31.478951] 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 [ 31.497859] RSP: 0018:ffff8801b61c6d10 EFLAGS: 00010286 [ 31.503218] RAX: 0000000000000000 RBX: ffff8801b61c6ed0 RCX: 0000000000000000 [ 31.510477] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 31.517740] RBP: ffff8801b61c6d30 R08: ffff8801b8d60740 R09: ffffed003b603eca [ 31.525007] R10: ffffed003b603eca R11: ffff8801db01f657 R12: 0000000000000001 [ 31.532267] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b61c6ed0 [ 31.539535] ? vprintk_func+0x81/0x117 [ 31.543417] security_secid_to_secctx+0x63/0xc0 [ 31.548096] ctnetlink_conntrack_event+0x303/0x1470 [ 31.553148] ? trace_hardirqs_on_caller+0xc0/0x2b0 [ 31.558133] ? ctnetlink_glue_build+0xc40/0xc40 [ 31.562818] ? lock_acquire+0x1e4/0x4f0 [ 31.566788] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 31.572160] ? __lock_is_held+0xb5/0x140 [ 31.576215] nf_conntrack_eventmask_report+0x55f/0x930 [ 31.581480] ? nf_ct_expect_register_notifier+0x250/0x250 [ 31.587011] ? mark_held_locks+0xc9/0x160 [ 31.591155] ? __local_bh_enable_ip+0x161/0x230 [ 31.595831] ? lockdep_hardirqs_on+0x421/0x5c0 [ 31.600422] nf_ct_delete+0x33c/0x5d0 [ 31.604205] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 31.609296] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 31.614213] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 31.618955] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 31.623531] ? nf_ct_alloc_hashtable+0x150/0x150 [ 31.628272] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 31.632578] ? find_held_lock+0x36/0x1c0 [ 31.636656] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 31.641598] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 31.646341] ? ctnetlink_glue_seqadj+0x90/0x90 [ 31.650914] ctnetlink_del_conntrack+0x66c/0x850 [ 31.655656] ? lock_downgrade+0x840/0x8f0 [ 31.659802] ? ctnetlink_dump_table+0x1590/0x1590 [ 31.664647] ? __lock_is_held+0xb5/0x140 [ 31.668709] ? ctnetlink_dump_table+0x1590/0x1590 [ 31.673558] nfnetlink_rcv_msg+0xd88/0x1070 [ 31.677891] ? nfnetlink_bind+0x3b0/0x3b0 [ 31.682029] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.687552] ? refcount_sub_and_test_checked+0x21a/0x350 [ 31.692997] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 31.698456] ? apparmor_cred_prepare+0x590/0x590 [ 31.703199] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.708731] netlink_rcv_skb+0x172/0x440 [ 31.712781] ? nfnetlink_bind+0x3b0/0x3b0 [ 31.716914] ? netlink_ack+0xbe0/0xbe0 [ 31.720790] ? __netlink_ns_capable+0x100/0x130 [ 31.725452] nfnetlink_rcv+0x1c0/0x4d0 [ 31.729321] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 31.734063] ? kasan_check_write+0x14/0x20 [ 31.738285] netlink_unicast+0x5a0/0x760 [ 31.742326] ? netlink_attachskb+0x9a0/0x9a0 [ 31.746745] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.752285] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 31.757294] netlink_sendmsg+0xa18/0xfc0 [ 31.761341] ? netlink_unicast+0x760/0x760 [ 31.765561] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 31.770477] ? apparmor_socket_sendmsg+0x29/0x30 [ 31.775216] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.780753] ? security_socket_sendmsg+0x94/0xc0 [ 31.785497] ? netlink_unicast+0x760/0x760 [ 31.789744] sock_sendmsg+0xd5/0x120 [ 31.793459] ___sys_sendmsg+0x7fd/0x930 [ 31.797423] ? copy_msghdr_from_user+0x580/0x580 [ 31.802164] ? graph_lock+0x170/0x170 [ 31.805955] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.811479] ? __fget_light+0x2f7/0x440 [ 31.815438] ? fget_raw+0x20/0x20 [ 31.818881] ? __do_page_fault+0x620/0xe50 [ 31.823118] ? lock_downgrade+0x8f0/0x8f0 [ 31.827260] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.832813] ? sockfd_lookup_light+0xc5/0x160 [ 31.837293] __sys_sendmsg+0x11d/0x290 [ 31.841166] ? __ia32_sys_shutdown+0x80/0x80 [ 31.845563] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.851086] ? __do_page_fault+0x449/0xe50 [ 31.855314] ? do_syscall_64+0x9a/0x820 [ 31.859275] ? do_syscall_64+0x9a/0x820 [ 31.863236] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 31.868332] __x64_sys_sendmsg+0x78/0xb0 [ 31.872381] do_syscall_64+0x1b9/0x820 [ 31.876262] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 31.881607] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.886518] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.891343] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 31.896338] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 31.901337] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.906940] ? prepare_exit_to_usermode+0x291/0x3b0 [ 31.911945] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.916786] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.921957] RIP: 0033:0x440f19 [ 31.925152] 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 [ 31.944036] RSP: 002b:00007fff0d42d4d8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 31.951731] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440f19 [ 31.958996] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 31.966256] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 31.973514] R10: 0000000001862880 R11: 0000000000000213 R12: 0000000000401e60 [ 31.980783] R13: 0000000000401ef0 R14: 0000000000000000 R15: 0000000000000000 [ 31.988466] Dumping ftrace buffer: [ 31.992063] (ftrace buffer empty) [ 31.995761] Kernel Offset: disabled [ 31.999393] Rebooting in 86400 seconds..