[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.254475] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.564806] random: sshd: uninitialized urandom read (32 bytes read) [ 27.832966] random: sshd: uninitialized urandom read (32 bytes read) [ 28.408565] random: sshd: uninitialized urandom read (32 bytes read) [ 28.588989] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. [ 34.111376] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 34.210338] ------------[ cut here ]------------ [ 34.215227] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 34.215376] WARNING: CPU: 1 PID: 4692 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.231479] Kernel panic - not syncing: panic_on_warn set ... [ 34.231479] [ 34.238830] CPU: 1 PID: 4692 Comm: syz-executor173 Not tainted 4.19.0-rc1+ #214 [ 34.246260] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.255596] Call Trace: [ 34.258183] dump_stack+0x1c9/0x2b4 [ 34.261804] ? dump_stack_print_info.cold.2+0x52/0x52 [ 34.266986] panic+0x238/0x4e7 [ 34.270168] ? add_taint.cold.5+0x16/0x16 [ 34.274304] ? __warn.cold.8+0x148/0x1ba [ 34.278356] ? __warn.cold.8+0x117/0x1ba [ 34.282444] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.287450] __warn.cold.8+0x163/0x1ba [ 34.291327] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.296335] report_bug+0x252/0x2d0 [ 34.299950] do_error_trap+0x1fc/0x4d0 [ 34.303824] ? math_error+0x3e0/0x3e0 [ 34.307619] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.312452] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.317457] ? vprintk_func+0x81/0x117 [ 34.321333] ? printk+0xa7/0xcf [ 34.324611] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.329444] do_invalid_op+0x1b/0x20 [ 34.333158] invalid_op+0x14/0x20 [ 34.336616] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.342234] 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 [ 34.361126] RSP: 0018:ffff8801bf786f38 EFLAGS: 00010286 [ 34.366484] RAX: 0000000000000000 RBX: ffff8801bf7870f8 RCX: 0000000000000000 [ 34.373739] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 34.380993] RBP: ffff8801bf786f58 R08: ffff8801b75c4780 R09: ffffed003b623eca [ 34.388248] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 34.395536] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801bf7870f8 [ 34.402806] ? vprintk_func+0x81/0x117 [ 34.406693] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 34.411699] security_secid_to_secctx+0x63/0xc0 [ 34.416360] ctnetlink_conntrack_event+0x303/0x1470 [ 34.421425] ? __local_bh_enable_ip+0x161/0x230 [ 34.426085] ? __nf_conntrack_confirm+0x1293/0x34f0 [ 34.431091] ? ctnetlink_glue_build+0xc40/0xc40 [ 34.435770] ? lock_acquire+0x1e4/0x4f0 [ 34.439733] ? nf_ct_deliver_cached_events+0xa3/0x7e0 [ 34.444915] ? nf_conntrack_tuple_taken+0x1140/0x1140 [ 34.450096] ? __lock_is_held+0xb5/0x140 [ 34.454160] nf_ct_deliver_cached_events+0x4eb/0x7e0 [ 34.459257] ? nf_ct_expect_unregister_notifier+0x210/0x210 [ 34.464956] ? icmp_checkentry+0x90/0x90 [ 34.469005] ? find_held_lock+0x36/0x1c0 [ 34.473066] ipv4_confirm+0x2d5/0x500 [ 34.476881] ? nf_ct_l4proto_register_one+0x680/0x680 [ 34.482061] ? __sanitizer_cov_trace_cmp2+0x18/0x20 [ 34.487064] ? nf_nat_ipv4_out+0x35f/0x3d0 [ 34.491289] ? nf_ct_l4proto_register_one+0x680/0x680 [ 34.496468] nf_hook_slow+0xc2/0x1c0 [ 34.500176] ip_output+0x562/0x880 [ 34.503709] ? __ip_local_out+0x5e3/0xb50 [ 34.507872] ? ip_mc_output+0x15d0/0x15d0 [ 34.512010] ? ip_fragment.constprop.49+0x240/0x240 [ 34.517034] ? __ip_make_skb+0x10ff/0x1b40 [ 34.521257] ? dst_release+0x5d/0xb0 [ 34.524962] ip_local_out+0xc5/0x1b0 [ 34.528666] ip_send_skb+0x40/0xe0 [ 34.532195] udp_send_skb.isra.41+0x6b7/0x11d0 [ 34.536770] udp_push_pending_frames+0x5c/0xf0 [ 34.541346] udp_sendpage+0x3b2/0x590 [ 34.545136] ? udp_sendmsg+0x38e0/0x38e0 [ 34.549199] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 34.554206] ? ktime_get_coarse_real_ts64+0x243/0x3a0 [ 34.559385] ? udp_sendmsg+0x38e0/0x38e0 [ 34.563439] inet_sendpage+0x1de/0x750 [ 34.567316] ? inet_sendmsg+0x690/0x690 [ 34.571283] ? current_time+0x131/0x1b0 [ 34.575249] kernel_sendpage+0x93/0xf0 [ 34.579126] ? inet_sendmsg+0x690/0x690 [ 34.583095] sock_sendpage+0x8c/0xc0 [ 34.586799] ? kernel_sendpage+0xf0/0xf0 [ 34.590850] pipe_to_sendpage+0x2d0/0x400 [ 34.595004] ? generic_pipe_buf_nosteal+0x10/0x10 [ 34.599855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.605403] ? splice_from_pipe_next.part.9+0x296/0x340 [ 34.610757] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 34.616301] ? touch_atime+0x103/0x320 [ 34.620186] __splice_from_pipe+0x38e/0x7c0 [ 34.624496] ? generic_pipe_buf_nosteal+0x10/0x10 [ 34.629354] splice_from_pipe+0x1ea/0x340 [ 34.633490] ? add_to_pipe+0x360/0x360 [ 34.637384] ? generic_pipe_buf_nosteal+0x10/0x10 [ 34.642447] ? splice_shrink_spd+0xd0/0xd0 [ 34.646676] generic_splice_sendpage+0x3c/0x50 [ 34.651246] ? splice_from_pipe+0x340/0x340 [ 34.655558] direct_splice_actor+0x128/0x190 [ 34.659960] splice_direct_to_actor+0x318/0x8f0 [ 34.664627] ? pipe_to_sendpage+0x400/0x400 [ 34.668945] ? do_splice_to+0x190/0x190 [ 34.672929] ? security_file_permission+0x1c2/0x230 [ 34.677955] ? rw_verify_area+0x118/0x360 [ 34.682096] do_splice_direct+0x2d4/0x420 [ 34.686236] ? splice_direct_to_actor+0x8f0/0x8f0 [ 34.691070] ? apparmor_file_permission+0x24/0x30 [ 34.695909] ? rw_verify_area+0x118/0x360 [ 34.700060] do_sendfile+0x62a/0xe20 [ 34.703803] ? do_compat_pwritev64+0x1c0/0x1c0 [ 34.708382] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.713909] ? _copy_from_user+0xdf/0x150 [ 34.718052] __x64_sys_sendfile64+0x15d/0x250 [ 34.722538] ? __ia32_sys_sendfile+0x2a0/0x2a0 [ 34.727132] do_syscall_64+0x1b9/0x820 [ 34.731019] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.736372] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.741294] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.746125] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 34.751136] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.756180] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.761027] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.766218] RIP: 0033:0x4401d9 [ 34.769399] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.788294] RSP: 002b:00007ffe77dd0788 EFLAGS: 00000217 ORIG_RAX: 0000000000000028 [ 34.795992] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 34.803251] RDX: 0000000020000080 RSI: 0000000000000004 RDI: 0000000000000003 [ 34.810509] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 34.818105] R10: 000000000000ffe4 R11: 0000000000000217 R12: 0000000000401a60 [ 34.825361] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 34.833084] Dumping ftrace buffer: [ 34.836707] (ftrace buffer empty) [ 34.840406] Kernel Offset: disabled [ 34.844038] Rebooting in 86400 seconds..