[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.099797] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.487402] random: sshd: uninitialized urandom read (32 bytes read) [ 26.844695] random: sshd: uninitialized urandom read (32 bytes read) [ 27.410484] random: sshd: uninitialized urandom read (32 bytes read) [ 27.580044] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts. [ 33.168681] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 33.270769] ------------[ cut here ]------------ [ 33.275718] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 33.275902] WARNING: CPU: 1 PID: 4682 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.292102] Kernel panic - not syncing: panic_on_warn set ... [ 33.292102] [ 33.299466] CPU: 1 PID: 4682 Comm: syz-executor346 Not tainted 4.19.0-rc1+ #117 [ 33.307011] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.316366] Call Trace: [ 33.318951] dump_stack+0x1c9/0x2b4 [ 33.322583] ? dump_stack_print_info.cold.2+0x52/0x52 [ 33.327768] panic+0x238/0x4e7 [ 33.330951] ? add_taint.cold.5+0x16/0x16 [ 33.335091] ? __warn.cold.8+0x148/0x1ba [ 33.339142] ? __warn.cold.8+0x117/0x1ba [ 33.343209] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.348216] __warn.cold.8+0x163/0x1ba [ 33.352104] ? apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.357110] report_bug+0x252/0x2d0 [ 33.360726] do_error_trap+0x1fc/0x4d0 [ 33.364602] ? math_error+0x3e0/0x3e0 [ 33.368505] ? vprintk_default+0x28/0x30 [ 33.372558] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.377402] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.382420] ? printk+0xa7/0xcf [ 33.385692] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.390526] do_invalid_op+0x1b/0x20 [ 33.394235] invalid_op+0x14/0x20 [ 33.397748] RIP: 0010:apparmor_secid_to_secctx+0x2b5/0x2f0 [ 33.403369] 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 [ 33.422631] RSP: 0018:ffff8801b670ecc0 EFLAGS: 00010286 [ 33.427985] RAX: 0000000000000000 RBX: ffff8801b670ee80 RCX: 0000000000000000 [ 33.435340] RDX: 0000000000000000 RSI: ffffffff8163ac01 RDI: 0000000000000001 [ 33.442601] RBP: ffff8801b670ece0 R08: ffff8801b917e4c0 R09: ffffed003b623eca [ 33.449859] R10: ffffed003b623eca R11: ffff8801db11f657 R12: 0000000000000001 [ 33.457119] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801b670ee80 [ 33.464397] ? vprintk_func+0x81/0x117 [ 33.468295] security_secid_to_secctx+0x63/0xc0 [ 33.472963] ctnetlink_conntrack_event+0x303/0x1470 [ 33.477973] ? trace_hardirqs_on_caller+0xc0/0x2b0 [ 33.482898] ? ctnetlink_glue_build+0xc40/0xc40 [ 33.487614] ? lock_acquire+0x1e4/0x4f0 [ 33.491586] ? nf_conntrack_eventmask_report+0xaf/0x930 [ 33.496959] ? __lock_is_held+0xb5/0x140 [ 33.501158] nf_conntrack_eventmask_report+0x55f/0x930 [ 33.506497] ? nf_ct_expect_register_notifier+0x250/0x250 [ 33.512031] ? mark_held_locks+0xc9/0x160 [ 33.516177] ? __local_bh_enable_ip+0x161/0x230 [ 33.520836] ? lockdep_hardirqs_on+0x421/0x5c0 [ 33.525423] nf_ct_delete+0x33c/0x5d0 [ 33.529216] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.534358] ? nf_ct_delete_from_lists+0x6f0/0x6f0 [ 33.539366] ? nf_ct_iterate_cleanup+0x42e/0x5e0 [ 33.544119] nf_ct_iterate_cleanup+0x48c/0x5e0 [ 33.548692] ? nf_ct_alloc_hashtable+0x150/0x150 [ 33.553441] ? nf_ct_gc_expired+0x4a0/0x4a0 [ 33.557837] nf_ct_iterate_cleanup_net+0x23c/0x2d0 [ 33.562764] ? nf_ct_iterate_cleanup+0x5e0/0x5e0 [ 33.567512] ? ctnetlink_glue_seqadj+0x90/0x90 [ 33.572095] ctnetlink_del_conntrack+0x66c/0x850 [ 33.576845] ? lock_downgrade+0x840/0x8f0 [ 33.580991] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.585827] ? __lock_is_held+0xb5/0x140 [ 33.589888] ? ctnetlink_dump_table+0x1590/0x1590 [ 33.594723] nfnetlink_rcv_msg+0xd88/0x1070 [ 33.599036] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.603176] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.608707] ? refcount_sub_and_test_checked+0x21a/0x350 [ 33.614155] ? refcount_inc_not_zero_checked+0x2f0/0x2f0 [ 33.619612] ? apparmor_cred_prepare+0x590/0x590 [ 33.624368] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.629905] netlink_rcv_skb+0x172/0x440 [ 33.633962] ? nfnetlink_bind+0x3b0/0x3b0 [ 33.638101] ? netlink_ack+0xbe0/0xbe0 [ 33.641983] ? __netlink_ns_capable+0x100/0x130 [ 33.646702] nfnetlink_rcv+0x1c0/0x4d0 [ 33.650590] ? nfnetlink_rcv_batch+0x1900/0x1900 [ 33.655378] ? kasan_check_write+0x14/0x20 [ 33.659607] netlink_unicast+0x5a0/0x760 [ 33.663653] ? netlink_attachskb+0x9a0/0x9a0 [ 33.668062] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.673601] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 33.678630] netlink_sendmsg+0xa18/0xfc0 [ 33.682685] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 33.687879] ? netlink_unicast+0x760/0x760 [ 33.692147] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 33.697068] ? apparmor_socket_sendmsg+0x29/0x30 [ 33.701886] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.707418] ? security_socket_sendmsg+0x94/0xc0 [ 33.712162] ? netlink_unicast+0x760/0x760 [ 33.716397] sock_sendmsg+0xd5/0x120 [ 33.720307] ___sys_sendmsg+0x7fd/0x930 [ 33.724270] ? copy_msghdr_from_user+0x580/0x580 [ 33.729016] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 33.733863] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.739395] ? __fget_light+0x2f7/0x440 [ 33.743363] ? fget_raw+0x20/0x20 [ 33.746814] ? find_held_lock+0x36/0x1c0 [ 33.750880] ? __do_page_fault+0x620/0xe50 [ 33.755114] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.760646] ? sockfd_lookup_light+0xc5/0x160 [ 33.765144] __sys_sendmsg+0x11d/0x290 [ 33.769201] ? __ia32_sys_shutdown+0x80/0x80 [ 33.773715] ? do_fast_syscall_32+0x150/0xfb2 [ 33.778206] ? do_fast_syscall_32+0x150/0xfb2 [ 33.782695] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 33.787897] ? mm_fault_error+0x380/0x380 [ 33.792109] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 33.796873] do_fast_syscall_32+0x34d/0xfb2 [ 33.801190] ? do_int80_syscall_32+0x890/0x890 [ 33.805832] ? entry_SYSENTER_compat+0x68/0x7f [ 33.810413] ? trace_hardirqs_off_caller+0xbb/0x2b0 [ 33.815420] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.820253] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.825205] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 33.830216] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 33.835227] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.840758] ? prepare_exit_to_usermode+0x291/0x3b0 [ 33.845774] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.850663] entry_SYSENTER_compat+0x70/0x7f [ 33.855066] RIP: 0023:0xf7f96ca9 [ 33.858426] 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 [ 33.877448] RSP: 002b:00000000ffdce56c EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 33.885150] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020d65000 [ 33.892407] RDX: 0000000000000000 RSI: 00000000ffdce6b4 RDI: 00000000ffdce6bc [ 33.899755] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 33.907138] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.914399] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.922169] Dumping ftrace buffer: [ 33.925786] (ftrace buffer empty) [ 33.929531] Kernel Offset: disabled [ 33.933155] Rebooting in 86400 seconds..