[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 41.117310] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 43.672178] random: sshd: uninitialized urandom read (32 bytes read) [ 44.045963] random: sshd: uninitialized urandom read (32 bytes read) [ 44.964435] random: sshd: uninitialized urandom read (32 bytes read) [ 45.232514] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. [ 50.816083] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 50.950504] ------------[ cut here ]------------ [ 50.955360] AppArmor WARN apparmor_secid_to_secctx: ((!secdata)): [ 50.955541] WARNING: CPU: 1 PID: 4802 at security/apparmor/secid.c:82 apparmor_secid_to_secctx+0x38d/0x3c0 [ 50.971647] Kernel panic - not syncing: panic_on_warn set ... [ 50.971647] [ 50.979037] CPU: 1 PID: 4802 Comm: syz-executor325 Not tainted 4.19.0-rc1+ #39 [ 50.986435] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.995812] Call Trace: [ 50.998443] dump_stack+0x14b/0x190 [ 51.002089] panic+0x35d/0x8cb [ 51.005324] __warn+0x40a/0x590 [ 51.008655] ? apparmor_secid_to_secctx+0x38d/0x3c0 [ 51.013702] report_bug+0x65c/0x850 [ 51.017344] ? apparmor_secid_to_secctx+0x38d/0x3c0 [ 51.022401] ? apparmor_secid_to_secctx+0x38d/0x3c0 [ 51.027446] do_error_trap+0x1c0/0x620 [ 51.031372] ? vprintk_func+0x1ea/0x220 [ 51.035383] do_invalid_op+0x46/0x50 [ 51.039101] invalid_op+0x14/0x20 [ 51.042613] RIP: 0010:apparmor_secid_to_secctx+0x38d/0x3c0 [ 51.048263] Code: c7 83 68 09 00 00 00 00 00 00 48 c7 83 80 0c 00 00 00 00 00 00 48 c7 c7 4c aa 8f 89 48 c7 c6 6d aa 8f 89 31 c0 e8 f3 e6 45 fd <0f> 0b e9 38 fd ff ff 8b 7d c4 e8 a4 d2 e6 fd e9 9d fe ff ff 49 89 [ 51.067167] RSP: 0018:ffff88019c1eed80 EFLAGS: 00010286 [ 51.072543] RAX: 0000000000000036 RBX: ffff8801cfd88900 RCX: ffff8801cfd88000 [ 51.079825] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: 0000000000000000 [ 51.087114] RBP: ffff88019c1eedf0 R08: 0000000000480020 R09: 0000000000000002 [ 51.094401] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 51.101668] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 51.108963] ? kmsan_set_origin_inline+0x6b/0x120 [ 51.113813] ? aa_secid_to_label+0x60/0x60 [ 51.118060] security_secid_to_secctx+0x127/0x200 [ 51.122909] ctnetlink_conntrack_event+0x54a/0x4390 [ 51.127966] ? get_page_from_freelist+0xae35/0xb8b0 [ 51.132991] ? kmsan_set_origin_inline+0x6b/0x120 [ 51.137840] ? ctnetlink_net_exit_batch+0x180/0x180 [ 51.142858] nf_conntrack_eventmask_report+0x579/0x970 [ 51.148157] nf_ct_delete+0x394/0x790 [ 51.151975] nf_ct_iterate_cleanup+0x4c2/0x750 [ 51.156565] ? nf_ct_iterate_cleanup+0x750/0x750 [ 51.161353] nf_ct_iterate_cleanup_net+0x17e/0x210 [ 51.166284] ? local_bh_enable+0x40/0x40 [ 51.170358] ? local_bh_enable+0x40/0x40 [ 51.174439] ctnetlink_del_conntrack+0xc32/0xd80 [ 51.179227] ? rcu_all_qs+0x2e/0x1f0 [ 51.182969] ? ctnetlink_get_conntrack+0xbc0/0xbc0 [ 51.187899] ? ctnetlink_get_conntrack+0xbc0/0xbc0 [ 51.192833] nfnetlink_rcv_msg+0xb49/0xca0 [ 51.197073] ? __module_address+0x6a/0x600 [ 51.201359] netlink_rcv_skb+0x36e/0x5f0 [ 51.205422] ? nfnetlink_bind+0x1d0/0x1d0 [ 51.209604] nfnetlink_rcv+0x36b/0x3a90 [ 51.213616] ? kmsan_internal_poison_shadow+0xb8/0x1b0 [ 51.218908] ? __kmalloc_node_track_caller+0x9e7/0x1160 [ 51.224271] ? __alloc_skb+0x2f5/0x9e0 [ 51.228185] ? netlink_sendmsg+0xb49/0x1290 [ 51.232536] ? ___sys_sendmsg+0xe70/0x1290 [ 51.236781] ? kmem_cache_alloc_node+0xa2a/0xc00 [ 51.241569] ? netlink_sendmsg+0xb49/0x1290 [ 51.245935] ? ___sys_sendmsg+0xe70/0x1290 [ 51.250185] ? do_syscall_64+0x15b/0x220 [ 51.254253] ? entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 51.259625] ? __msan_poison_alloca+0x173/0x1f0 [ 51.264317] ? __local_bh_enable_ip+0x37/0x150 [ 51.268899] ? _raw_spin_unlock_bh+0x4b/0x60 [ 51.273351] ? kmsan_set_origin_inline+0x6b/0x120 [ 51.278227] ? __msan_poison_alloca+0x173/0x1f0 [ 51.282936] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 51.288341] ? netlink_deliver_tap+0xcb/0xf50 [ 51.292868] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 51.298261] ? rhashtable_jhash2+0x47f/0x620 [ 51.302691] netlink_unicast+0x1638/0x1720 [ 51.306957] ? nfnetlink_net_exit_batch+0x290/0x290 [ 51.312005] netlink_sendmsg+0x1205/0x1290 [ 51.316299] ___sys_sendmsg+0xe70/0x1290 [ 51.320415] ? netlink_getsockopt+0x11c0/0x11c0 [ 51.325144] ? __fget_light+0x53/0x700 [ 51.329056] ? __fdget+0x4e/0x60 [ 51.332452] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 51.337862] ? __fget_light+0x1f1/0x700 [ 51.341887] __x64_sys_sendmsg+0x32d/0x460 [ 51.346162] ? ___sys_sendmsg+0x1290/0x1290 [ 51.350484] do_syscall_64+0x15b/0x220 [ 51.354376] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 51.359582] RIP: 0033:0x444d39 [ 51.362791] Code: e8 0c ad 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 db ce fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 51.381688] RSP: 002b:00007ffcb26566f8 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 51.389410] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444d39 [ 51.396684] RDX: 0000000000000000 RSI: 0000000020d65000 RDI: 0000000000000003 [ 51.403970] RBP: 0000000000000000 R08: 00000000004002e0 R09: 00000000004002e0 [ 51.411232] R10: 0000000001d3b880 R11: 0000000000000213 R12: 00000000004020a0 [ 51.418505] R13: 0000000000402130 R14: 0000000000000000 R15: 0000000000000000 [ 51.426097] Dumping ftrace buffer: [ 51.429640] (ftrace buffer empty) [ 51.433339] Kernel Offset: disabled [ 51.436969] Rebooting in 86400 seconds..