[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   29.984085] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   31.891778] random: sshd: uninitialized urandom read (32 bytes read)
[   32.175821] random: sshd: uninitialized urandom read (32 bytes read)
[   33.310691] random: sshd: uninitialized urandom read (32 bytes read)
[   33.516593] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts.
[   38.964399] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   39.074998] ==================================================================
[   39.082432] BUG: KMSAN: uninit-value in nfqnl_recv_config+0x939/0x17d0
[   39.089090] CPU: 1 PID: 4521 Comm: syz-executor120 Not tainted 4.17.0+ #5
[   39.095993] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.105325] Call Trace:
[   39.107892]  dump_stack+0x185/0x1d0
[   39.111497]  kmsan_report+0x188/0x2a0
[   39.115279]  __msan_warning_32+0x70/0xc0
[   39.119318]  nfqnl_recv_config+0x939/0x17d0
[   39.123621]  ? mutex_lock+0x31/0x90
[   39.127232]  ? nfqnl_recv_verdict+0x2330/0x2330
[   39.131973]  nfnetlink_rcv_msg+0xb2e/0xc80
[   39.136193]  netlink_rcv_skb+0x37e/0x600
[   39.140234]  ? nfnetlink_bind+0x1d0/0x1d0
[   39.144363]  nfnetlink_rcv+0x2fe/0x680
[   39.148232]  ? nfnetlink_net_exit_batch+0x270/0x270
[   39.153225]  netlink_unicast+0x1680/0x1750
[   39.157443]  ? nfnetlink_net_exit_batch+0x270/0x270
[   39.162439]  netlink_sendmsg+0x104f/0x1350
[   39.166653]  ? netlink_getsockopt+0xc60/0xc60
[   39.171126]  ___sys_sendmsg+0xec8/0x1320
[   39.175167]  ? __fdget+0x4e/0x60
[   39.178509]  ? __fget_light+0x57/0x700
[   39.182373]  ? __fdget+0x4e/0x60
[   39.185717]  ? __fget_light+0x1dc/0x700
[   39.189668]  ? __msan_metadata_ptr_for_load_4+0x10/0x20
[   39.195017]  ? __fget_light+0x1f5/0x700
[   39.198978]  __x64_sys_sendmsg+0x331/0x460
[   39.203202]  ? ___sys_sendmsg+0x1320/0x1320
[   39.207501]  do_syscall_64+0x15b/0x230
[   39.211382]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   39.216565] RIP: 0033:0x43fd59
[   39.219731] RSP: 002b:00007ffde0e30d28 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
[   39.227413] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd59
[   39.234660] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
[   39.241913] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   39.249158] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401680
[   39.256406] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000
[   39.263667] 
[   39.265270] Uninit was created at:
[   39.268791]  kmsan_internal_poison_shadow+0xb8/0x1b0
[   39.273871]  kmsan_kmalloc+0x94/0x100
[   39.277647]  kmsan_slab_alloc+0x10/0x20
[   39.281597]  __kmalloc_node_track_caller+0xb35/0x11b0
[   39.286767]  __alloc_skb+0x2cb/0x9e0
[   39.290460]  netlink_sendmsg+0x76e/0x1350
[   39.294581]  ___sys_sendmsg+0xec8/0x1320
[   39.298625]  __x64_sys_sendmsg+0x331/0x460
[   39.302845]  do_syscall_64+0x15b/0x230
[   39.306711]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   39.311879] ==================================================================
[   39.319212] Disabling lock debugging due to kernel taint
[   39.324636] Kernel panic - not syncing: panic_on_warn set ...
[   39.324636] 
[   39.331979] CPU: 1 PID: 4521 Comm: syz-executor120 Tainted: G    B             4.17.0+ #5
[   39.340269] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   39.349604] Call Trace:
[   39.352192]  dump_stack+0x185/0x1d0
[   39.355799]  panic+0x3d0/0x990
[   39.358975]  kmsan_report+0x29e/0x2a0
[   39.362767]  __msan_warning_32+0x70/0xc0
[   39.366811]  nfqnl_recv_config+0x939/0x17d0
[   39.371109]  ? mutex_lock+0x31/0x90
[   39.374718]  ? nfqnl_recv_verdict+0x2330/0x2330
[   39.379371]  nfnetlink_rcv_msg+0xb2e/0xc80
[   39.383588]  netlink_rcv_skb+0x37e/0x600
[   39.387635]  ? nfnetlink_bind+0x1d0/0x1d0
[   39.391771]  nfnetlink_rcv+0x2fe/0x680
[   39.395637]  ? nfnetlink_net_exit_batch+0x270/0x270
[   39.400630]  netlink_unicast+0x1680/0x1750
[   39.404845]  ? nfnetlink_net_exit_batch+0x270/0x270
[   39.409848]  netlink_sendmsg+0x104f/0x1350
[   39.414076]  ? netlink_getsockopt+0xc60/0xc60
[   39.418556]  ___sys_sendmsg+0xec8/0x1320
[   39.422608]  ? __fdget+0x4e/0x60
[   39.425951]  ? __fget_light+0x57/0x700
[   39.429816]  ? __fdget+0x4e/0x60
[   39.433168]  ? __fget_light+0x1dc/0x700
[   39.437129]  ? __msan_metadata_ptr_for_load_4+0x10/0x20
[   39.442471]  ? __fget_light+0x1f5/0x700
[   39.446430]  __x64_sys_sendmsg+0x331/0x460
[   39.450646]  ? ___sys_sendmsg+0x1320/0x1320
[   39.454945]  do_syscall_64+0x15b/0x230
[   39.458823]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   39.463990] RIP: 0033:0x43fd59
[   39.467158] RSP: 002b:00007ffde0e30d28 EFLAGS: 00000213 ORIG_RAX: 000000000000002e
[   39.474844] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 000000000043fd59
[   39.482100] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
[   39.489353] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
[   39.496604] R10: 00000000004002c8 R11: 0000000000000213 R12: 0000000000401680
[   39.503849] R13: 0000000000401710 R14: 0000000000000000 R15: 0000000000000000
[   39.511640] Dumping ftrace buffer:
[   39.515162]    (ftrace buffer empty)
[   39.518855] Kernel Offset: disabled
[   39.522456] Rebooting in 86400 seconds..