[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   34.285445] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   38.905614] random: sshd: uninitialized urandom read (32 bytes read)
[   39.384747] random: sshd: uninitialized urandom read (32 bytes read)
[   40.762407] random: sshd: uninitialized urandom read (32 bytes read)
[   47.061947] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts.
[   52.632636] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   52.753044] WARNING: CPU: 0 PID: 4556 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0
[   52.761574] Kernel panic - not syncing: panic_on_warn set ...
[   52.761574] 
[   52.768942] CPU: 0 PID: 4556 Comm: syz-executor801 Not tainted 4.18.0-rc4+ #26
[   52.776300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   52.785651] Call Trace:
[   52.788257]  dump_stack+0x185/0x1e0
[   52.791904]  panic+0x3d0/0x9b0
[   52.795106]  ? hash_netport6_del+0x21a/0x1a10
[   52.799615]  __warn+0x40f/0x580
[   52.802894]  ? smc_unhash_sk+0x37b/0x3f0
[   52.806974]  report_bug+0x72a/0x880
[   52.810602]  ? smc_unhash_sk+0x37b/0x3f0
[   52.814661]  ? smc_unhash_sk+0x37b/0x3f0
[   52.818742]  do_error_trap+0x1fe/0x710
[   52.822656]  ? sock_destroy_inode+0xab/0xd0
[   52.827000]  ? sock_alloc_inode+0x2b0/0x2b0
[   52.831353]  do_invalid_op+0x46/0x50
[   52.835094]  invalid_op+0x14/0x20
[   52.838558] RIP: 0010:smc_unhash_sk+0x37b/0x3f0
[   52.843248] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 30 a8 d5 f7 e9 f7 fe ff ff 8b 3a e8 24 a8 d5 f7 41 83 fe 01 0f 85 11 ff ff ff e8 a5 f6 79 f7 <0f> 0b 4d 85 e4 0f 84 0f ff ff ff 8b 7d d4 e8 02 a8 d5 f7 4d 85 e4 
[   52.863884] RSP: 0018:ffff88019178f9f8 EFLAGS: 00010293
[   52.869283] RAX: ffffffff89ee346b RBX: ffff8801adfa4080 RCX: ffff88018be89d80
[   52.876553] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000a13dd80
[   52.883844] RBP: ffff88019178fa78 R08: 0000000000480020 R09: 0000000000000002
[   52.891456] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000
[   52.899416] R13: ffff8801adfa4000 R14: 0000000000000001 R15: 00000000d8600099
[   52.906714]  ? smc_hash_sk+0x3a0/0x3a0
[   52.910604]  ? smc_unhash_sk+0x37b/0x3f0
[   52.914789]  ? smc_unhash_sk+0x37b/0x3f0
[   52.918882]  ? smc_hash_sk+0x3a0/0x3a0
[   52.922763]  smc_release+0x81b/0x900
[   52.926500]  ? smc_sock_alloc+0x830/0x830
[   52.930666]  sock_close+0x11e/0x360
[   52.934489]  __fput+0x458/0xa30
[   52.937784]  ? fput+0x300/0x300
[   52.941083]  ____fput+0x37/0x40
[   52.944554]  task_work_run+0x22e/0x2b0
[   52.948460]  do_exit+0x110e/0x3930
[   52.952053]  do_group_exit+0x1a0/0x360
[   52.955978]  __do_sys_exit_group+0x21/0x30
[   52.960249]  __se_sys_exit_group+0x14/0x20
[   52.964600]  __x64_sys_exit_group+0x4c/0x50
[   52.968943]  ? do_group_exit+0x360/0x360
[   52.973028]  do_syscall_64+0x15b/0x230
[   52.976947]  entry_SYSCALL_64_after_hwframe+0x63/0xe7
[   52.982143] RIP: 0033:0x43ec88
[   52.985321] Code: Bad RIP value.
[   52.988881] RSP: 002b:00007ffe5418d508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   52.996594] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88
[   53.003859] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   53.011123] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0
[   53.018392] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001
[   53.025674] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   53.033478] Dumping ftrace buffer:
[   53.037029]    (ftrace buffer empty)
[   53.040728] Kernel Offset: disabled
[   53.044357] Rebooting in 86400 seconds..