[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.288010] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.970913] random: sshd: uninitialized urandom read (32 bytes read) [ 38.260153] random: sshd: uninitialized urandom read (32 bytes read) [ 39.648635] random: sshd: uninitialized urandom read (32 bytes read) [ 39.881941] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.49' (ECDSA) to the list of known hosts. [ 45.518945] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.642399] WARNING: CPU: 0 PID: 4592 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 45.650962] Kernel panic - not syncing: panic_on_warn set ... [ 45.650962] [ 45.658352] CPU: 0 PID: 4592 Comm: syz-executor613 Not tainted 4.18.0-rc4+ #27 [ 45.665708] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.675075] Call Trace: [ 45.677693] dump_stack+0x185/0x1e0 [ 45.681353] panic+0x3d0/0x9b0 [ 45.684557] __warn+0x40f/0x580 [ 45.688097] ? smc_unhash_sk+0x37b/0x3f0 [ 45.692170] report_bug+0x72a/0x880 [ 45.695802] ? smc_unhash_sk+0x37b/0x3f0 [ 45.699867] ? smc_unhash_sk+0x37b/0x3f0 [ 45.703956] do_error_trap+0x1fe/0x710 [ 45.707878] ? sock_destroy_inode+0xab/0xd0 [ 45.712221] ? sock_alloc_inode+0x2b0/0x2b0 [ 45.716576] do_invalid_op+0x46/0x50 [ 45.720310] invalid_op+0x14/0x20 [ 45.723769] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 45.728443] Code: d5 f7 e9 e5 fe ff ff 8b 7d d4 e8 60 a5 d5 f7 e9 f7 fe ff ff 8b 3a e8 54 a5 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 32 a5 d5 f7 4d 85 e4 [ 45.747789] RSP: 0018:ffff88019caaf9f8 EFLAGS: 00010293 [ 45.753167] RAX: ffffffff89ee346b RBX: ffff8801a947c080 RCX: ffff880190a08000 [ 45.760441] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009f7ae80 [ 45.767712] RBP: ffff88019caafa78 R08: 0000000000480020 R09: 0000000000000002 [ 45.775712] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 45.782997] R13: ffff8801a947c000 R14: 0000000000000001 R15: 000000008f400099 [ 45.790308] ? smc_hash_sk+0x3a0/0x3a0 [ 45.794205] ? smc_unhash_sk+0x37b/0x3f0 [ 45.798290] ? smc_unhash_sk+0x37b/0x3f0 [ 45.802385] ? smc_hash_sk+0x3a0/0x3a0 [ 45.806271] smc_release+0x81b/0x900 [ 45.810012] ? smc_sock_alloc+0x830/0x830 [ 45.814216] sock_close+0x11e/0x360 [ 45.817869] __fput+0x458/0xa30 [ 45.821184] ? fput+0x300/0x300 [ 45.824491] ____fput+0x37/0x40 [ 45.827786] task_work_run+0x22e/0x2b0 [ 45.831677] do_exit+0x110e/0x3930 [ 45.835366] do_group_exit+0x1a0/0x360 [ 45.839281] __do_sys_exit_group+0x21/0x30 [ 45.843535] __se_sys_exit_group+0x14/0x20 [ 45.847796] __x64_sys_exit_group+0x4c/0x50 [ 45.852140] ? do_group_exit+0x360/0x360 [ 45.856214] do_syscall_64+0x15b/0x230 [ 45.860113] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 45.865302] RIP: 0033:0x43ec88 [ 45.868481] Code: Bad RIP value. [ 45.871860] RSP: 002b:00007ffcd7248428 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.879592] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 45.886858] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 45.894130] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.901407] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000001 [ 45.908745] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 45.916571] Dumping ftrace buffer: [ 45.920114] (ftrace buffer empty) [ 45.923830] Kernel Offset: disabled [ 45.927459] Rebooting in 86400 seconds..