[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   33.505415] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   37.159500] random: sshd: uninitialized urandom read (32 bytes read)
[   37.472424] random: sshd: uninitialized urandom read (32 bytes read)
[   38.939717] random: sshd: uninitialized urandom read (32 bytes read)
[   39.167171] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts.
[   44.630542] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   44.748387] WARNING: CPU: 1 PID: 4578 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   44.756937] Kernel panic - not syncing: panic_on_warn set ...
[   44.756937] 
[   44.764308] CPU: 1 PID: 4578 Comm: syz-executor734 Not tainted 4.18.0-rc5+ #29
[   44.771658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   44.781016] Call Trace:
[   44.783617]  dump_stack+0x185/0x1e0
[   44.787263]  panic+0x3d0/0x9b0
[   44.790479]  ? check_mem_access+0x153a/0x71e0
[   44.794982]  __warn+0x40f/0x580
[   44.798257]  ? smc_unhash_sk+0x37b/0x3f0
[   44.802318]  report_bug+0x72a/0x880
[   44.805957]  ? smc_unhash_sk+0x37b/0x3f0
[   44.810024]  ? smc_unhash_sk+0x37b/0x3f0
[   44.814140]  do_error_trap+0x1fe/0x710
[   44.818088]  ? sock_destroy_inode+0xab/0xd0
[   44.822440]  ? sock_alloc_inode+0x2b0/0x2b0
[   44.826770]  do_invalid_op+0x46/0x50
[   44.830492]  invalid_op+0x14/0x20
[   44.833943] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   44.838595] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 95 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 95 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 95 e0 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 95 d5 f7 4d 85 e4 
[   44.857920] RSP: 0018:ffff88018ccff9f8 EFLAGS: 00010293
[   44.863279] RAX: ffffffff89ee446b RBX: ffff880197638080 RCX: ffff88018d758000
[   44.870545] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea00098c5500
[   44.877818] RBP: ffff88018ccffa78 R08: 0000000000480020 R09: 0000000000000002
[   44.885082] R10: 0000000000000000 R11: ffffffff89ee40f0 R12: 0000000000000000
[   44.892359] R13: ffff880197638000 R14: 0000000000000001 R15: 00000000d1000099
[   44.899648]  ? smc_hash_sk+0x3a0/0x3a0
[   44.903532]  ? smc_unhash_sk+0x37b/0x3f0
[   44.907589]  ? smc_unhash_sk+0x37b/0x3f0
[   44.911667]  ? smc_hash_sk+0x3a0/0x3a0
[   44.915559]  smc_release+0x81b/0x900
[   44.919293]  ? smc_sock_alloc+0x830/0x830
[   44.923470]  sock_close+0x11e/0x360
[   44.927109]  __fput+0x458/0xa30
[   44.930407]  ? fput+0x300/0x300
[   44.933691]  ____fput+0x37/0x40
[   44.936984]  task_work_run+0x22e/0x2b0
[   44.940872]  do_exit+0x110e/0x3930
[   44.944434]  do_group_exit+0x1a0/0x360
[   44.948338]  __do_sys_exit_group+0x21/0x30
[   44.952592]  __se_sys_exit_group+0x14/0x20
[   44.956839]  __x64_sys_exit_group+0x4c/0x50
[   44.961171]  ? do_group_exit+0x360/0x360
[   44.965240]  do_syscall_64+0x15b/0x230
[   44.969125]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   44.974308] RIP: 0033:0x43ec78
[   44.977481] Code: Bad RIP value.
[   44.980861] RSP: 002b:00007ffecb0fa5b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   44.988568] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec78
[   44.995829] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   45.003097] RBP: 00000000004be528 R08: 00000000000000e7 R09: ffffffffffffffd0
[   45.010371] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001
[   45.017630] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   45.025404] Dumping ftrace buffer:
[   45.028935]    (ftrace buffer empty)
[   45.032634] Kernel Offset: disabled
[   45.036257] Rebooting in 86400 seconds..