[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.051358] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.561242] random: sshd: uninitialized urandom read (32 bytes read) [ 26.909556] random: sshd: uninitialized urandom read (32 bytes read) [ 27.442705] random: sshd: uninitialized urandom read (32 bytes read) [ 27.615535] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.49' (ECDSA) to the list of known hosts. [ 33.287331] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.393276] ------------[ cut here ]------------ [ 33.398168] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 33.398347] WARNING: CPU: 1 PID: 4638 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.414431] Kernel panic - not syncing: panic_on_warn set ... [ 33.414431] [ 33.421795] CPU: 1 PID: 4638 Comm: syz-executor569 Not tainted 4.19.0-rc1+ #117 [ 33.429234] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.438569] Call Trace: [ 33.441165] dump_stack+0x1c9/0x2b4 [ 33.444789] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.449982] panic+0x238/0x4e7 [ 33.453171] ? add_taint.cold.5+0x16/0x16 [ 33.457366] ? __warn.cold.8+0x148/0x1ba [ 33.461469] ? __warn.cold.8+0x117/0x1ba [ 33.465566] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.470574] __warn.cold.8+0x163/0x1ba [ 33.474502] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.479551] report_bug+0x252/0x2d0 [ 33.483186] do_error_trap+0x1fc/0x4d0 [ 33.487064] ? math_error+0x3e0/0x3e0 [ 33.491377] ? vprintk_default+0x28/0x30 [ 33.495434] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.500299] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.505334] ? printk+0xa7/0xcf [ 33.508604] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.513436] do_invalid_op+0x1b/0x20 [ 33.517134] invalid_op+0x14/0x20 [ 33.520579] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.526225] 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 [ 33.545120] RSP: 0018:ffff8801ba956cc0 EFLAGS: 00010286 [ 33.550476] RAX: 0000000000000000 RBX: ffff8801ba956e80 RCX: 0000000000000000 [ 33.557732] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 33.564987] RBP: ffff8801ba956ce0 R08: ffff8801bac663c0 R09: ffffed003b623eca [ 33.572240] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 33.579530] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801ba956e80 [ 33.586803] ? vprintk_func+0x81/0x117 [ 33.590688] security_secid_to_secctx+0x63/0xc0 [ 33.595358] ctnetlink_conntrack_event+0x303/0x1470 [ 33.600367] ? ctnetlink_glue_build+0xc40/0xc40 [ 33.605023] ? lock_acquire+0x1e4/0x4f0 [ 33.608987] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 33.614344] ? print_usage_bug+0xc0/0xc0 [ 33.618465] ? __lock_is_held+0xb5/0x140 [ 33.622537] nf_conntrack_eventmask_report+0x55f/0x930 [ 33.627806] ? nf_ct_expect_register_notifier+0x250/0x250 [ 33.633400] ? mark_held_locks+0xc9/0x160 [ 33.637555] ? __local_bh_enable_ip+0x161/0x230 [ 33.642222] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.646796] nf_ct_delete+0x33c/0x5d0 [ 33.650587] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.655683] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 33.660605] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 33.665422] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 33.670001] ? nf_ct_alloc_hashtable+0x150/0x150 [ 33.674749] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 33.679060] ? find_held_lock+0x36/0x1c0 [ 33.683113] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 33.688035] ? graph_lock+0x170/0x170 [ 33.691832] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 33.696588] ? ctnetlink_glue_seqadj+0x90/0x90 [ 33.701168] ctnetlink_del_conntrack+0x66c/0x850 [ 33.705916] ? lock_downgrade+0x840/0x8f0 [ 33.710139] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.715015] ? __lock_is_held+0xb5/0x140 [ 33.719074] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.724039] nfnetlink_rcv_msg+0xd88/0x1070 [ 33.728371] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.732560] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.738101] ? refcount_sub_and_test_checked+0x21a/0x350 [ 33.743578] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 33.749041] ? apparmor_cred_prepare+0x590/0x590 [ 33.753786] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.759319] netlink_rcv_skb+0x172/0x440 [ 33.763376] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.767510] ? netlink_ack+0xbe0/0xbe0 [ 33.771385] ? __netlink_ns_capable+0x100/0x130 [ 33.776044] nfnetlink_rcv+0x1c0/0x4d0 [ 33.779920] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 33.784731] ? kasan_check_write+0x14/0x20 [ 33.788962] netlink_unicast+0x5a0/0x760 [ 33.793014] ? netlink_attachskb+0x9a0/0x9a0 [ 33.797416] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.803081] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 33.808102] netlink_sendmsg+0xa18/0xfc0 [ 33.812154] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 33.817347] ? netlink_unicast+0x760/0x760 [ 33.821573] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 33.826500] ? apparmor_socket_sendmsg+0x29/0x30 [ 33.831248] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.836778] ? security_socket_sendmsg+0x94/0xc0 [ 33.841524] ? netlink_unicast+0x760/0x760 [ 33.845747] sock_sendmsg+0xd5/0x120 [ 33.849462] ___sys_sendmsg+0x7fd/0x930 [ 33.853476] ? copy_msghdr_from_user+0x580/0x580 [ 33.858346] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 33.863197] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.868817] ? __fget_light+0x2f7/0x440 [ 33.872796] ? fget_raw+0x20/0x20 [ 33.876243] ? find_held_lock+0x36/0x1c0 [ 33.880299] ? __do_page_fault+0x620/0xe50 [ 33.884606] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.890138] ? sockfd_lookup_light+0xc5/0x160 [ 33.894629] __sys_sendmsg+0x11d/0x290 [ 33.898509] ? __ia32_sys_shutdown+0x80/0x80 [ 33.903065] ? do_fast_syscall_32+0x150/0xfb2 [ 33.907553] ? do_fast_syscall_32+0x150/0xfb2 [ 33.912046] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.917147] ? mm_fault_error+0x380/0x380 [ 33.921380] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 33.926127] do_fast_syscall_32+0x34d/0xfb2 [ 33.930437] ? do_int80_syscall_32+0x890/0x890 [ 33.935008] ? entry_SYSENTER_compat+0x68/0x7f [ 33.939577] ? trace_hardirqs_off_caller+0xbb/0x2b0 [ 33.944582] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.949414] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.954304] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.959331] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 33.964343] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.969869] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.974881] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.979774] entry_SYSENTER_compat+0x70/0x7f [ 33.984174] RIP: 0023:0xf7f08ca9 [ 33.987526] 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 [ 34.006515] RSP: 002b:00000000ff9cebdc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 34.014216] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020d65000 [ 34.021472] RDX: 0000000000000000 RSI: 00000000ff9ced24 RDI: 00000000ff9ced2c [ 34.028730] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 34.035983] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 34.043238] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 34.050957] Dumping ftrace buffer: [ 34.054558] (ftrace buffer empty) [ 34.058253] Kernel Offset: disabled [ 34.061865] Rebooting in 86400 seconds..