[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.942504] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.689084] random: sshd: uninitialized urandom read (32 bytes read) [ 37.922417] random: sshd: uninitialized urandom read (32 bytes read) [ 39.271954] random: sshd: uninitialized urandom read (32 bytes read) [ 40.174858] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts. [ 45.735252] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 45.853646] WARNING: CPU: 1 PID: 4583 at ./include/net/sock.h:644 smc_unhash_sk+0x37b/0x3f0 [ 45.862192] Kernel panic - not syncing: panic_on_warn set ... [ 45.862192] [ 45.869563] CPU: 1 PID: 4583 Comm: syz-executor814 Not tainted 4.18.0-rc4+ #27 [ 45.876909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.886256] Call Trace: [ 45.888862] dump_stack+0x185/0x1e0 [ 45.892491] panic+0x3d0/0x9b0 [ 45.895693] __warn+0x40f/0x580 [ 45.898966] ? smc_unhash_sk+0x37b/0x3f0 [ 45.903126] report_bug+0x72a/0x880 [ 45.906750] ? smc_unhash_sk+0x37b/0x3f0 [ 45.910897] ? smc_unhash_sk+0x37b/0x3f0 [ 45.914995] do_error_trap+0x1fe/0x710 [ 45.918927] ? sock_destroy_inode+0xab/0xd0 [ 45.923528] ? sock_alloc_inode+0x2b0/0x2b0 [ 45.927863] do_invalid_op+0x46/0x50 [ 45.931581] invalid_op+0x14/0x20 [ 45.935044] RIP: 0010:smc_unhash_sk+0x37b/0x3f0 [ 45.939696] 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 [ 45.959060] RSP: 0018:ffff8801b370f9f8 EFLAGS: 00010293 [ 45.964421] RAX: ffffffff89ee346b RBX: ffff8801a2ee4080 RCX: ffff8801cc2d9d80 [ 45.971689] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea0009d19580 [ 45.978950] RBP: ffff8801b370fa78 R08: 0000000000480020 R09: 0000000000000002 [ 45.986216] R10: 0000000000000000 R11: ffffffff89ee30f0 R12: 0000000000000000 [ 45.993495] R13: ffff8801a2ee4000 R14: 0000000000000001 R15: 00000000aa200099 [ 46.000786] ? smc_hash_sk+0x3a0/0x3a0 [ 46.004669] ? smc_unhash_sk+0x37b/0x3f0 [ 46.008758] ? smc_unhash_sk+0x37b/0x3f0 [ 46.012842] ? smc_hash_sk+0x3a0/0x3a0 [ 46.016723] smc_release+0x81b/0x900 [ 46.020472] ? smc_sock_alloc+0x830/0x830 [ 46.024634] sock_close+0x11e/0x360 [ 46.028272] __fput+0x458/0xa30 [ 46.031569] ? fput+0x300/0x300 [ 46.034855] ____fput+0x37/0x40 [ 46.038145] task_work_run+0x22e/0x2b0 [ 46.042044] do_exit+0x110e/0x3930 [ 46.045607] do_group_exit+0x1a0/0x360 [ 46.049510] __do_sys_exit_group+0x21/0x30 [ 46.053778] __se_sys_exit_group+0x14/0x20 [ 46.058054] __x64_sys_exit_group+0x4c/0x50 [ 46.062393] ? do_group_exit+0x360/0x360 [ 46.066465] do_syscall_64+0x15b/0x230 [ 46.070351] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 46.075533] RIP: 0033:0x43ec88 [ 46.078709] Code: Bad RIP value. [ 46.082094] RSP: 002b:00007ffd526354f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 46.089807] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ec88 [ 46.097069] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 46.105182] RBP: 00000000004be548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 46.112450] R10: 0000000020000040 R11: 0000000000000246 R12: 0000000000000001 [ 46.119711] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 46.127445] Dumping ftrace buffer: [ 46.131007] (ftrace buffer empty) [ 46.134705] Kernel Offset: disabled [ 46.138326] Rebooting in 86400 seconds..